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This page is intended to provide links to all of the tests that have been documented on the site.  Because many tests are small efforts done out of curiosity or to explore variations of primary tests there may be test activities that don’t make it into the site menu.

Opaque Hood Showing Intake Inlets
Opaque Hood Showing Intake Inlets

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Last updated: June 18, 2022
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EditorialIntroduction to VWA site about the Volkswagen Golf Mk7 4DR Hatchback. Tests and analysis of results pertaining to aftermarket upgrades in the search for the best performance.
EditorialVW Golf Search Underway
Modification ResearchModification ResearchResearch into some optional power adders for the Volkswagen Golf GTI Mk7, looking at some of the options for modifying boost and other engine parameters.
Vehicle QuestVW Golf GTI trim levels comparedComparing the various VW Golf GTI trim levels is something I need to get settled and decided upon early in the process so that I can narrow my search.
Modification ResearchModification Research ContinuingSome information I have been able to locate on some aftermarket intake systems from APR and VMW compared to the VW stock intake on a DynoJet Dyno.
Vehicle QuestThe Search Continues
Vehicle QuestGolf GTI vs Golf R
Vehicle QuestJourney to the MK7
Vehicle QuestVW Mk7 Golf R Resources
Vehicle QuestDecision: Golf R
Vehicle QuestDSG or 6MT
Modification ResearchWhen Geeking Out goes wrong
TestingDragy DataloggerDragy datalogger is offered through Burger Motorsport and with a low price compared to VBOX and GTech I decided to give the product a try.
Vehicle QuestClose Call
Vehicle QuestVW Golf GTI Sport
Vehicle QuestGolf R Test Drive
Quick AnalysisMetal or Plastic Turbo Inlet PipingA back of the envelope analysis of the affect that material type of inlet piping might have on the air that is flowing through the Turbo Inlet Pipe.
Vehicle QuestGTI vs R AnalysisVW GTI versus R decision matrix to help determine which of these Volkswagen performance hatchbacks best meets my automobile needs and wishes.
Vehicle QuestTest Drive Decision
Vehicle QuestDepreciation
Vehicle QuestWinner
Testing>AirflowStock Airbox ModificationA Stock Airbox modification is made to a Mk7 GTI airbox to determine how airflow amount is changed and if improvements result by removing the Snow Guard.
Quick AnalysisMk7 GTI Majesty FMICEvaluating the dimensions of a Majesty Front Mount Intercooler (FMIC) for the VW Mk7 GTI and making a comparison with the Mabotech FMIC.
Testing>AirflowaFe Magnum Flow Pro Dry S Air FilterContinuing to try and improve airflow through the Mk7 GTI stock airbox by testing the Magnum Flow Pro Dry S Air Filter for Mk7 GTI on the flowbench.
Testing>AirflowTurbocharger Inlet Pipe Airflow TestAirflow test involving the Mk7 GTI stock Turbocharger Inlet Pipe with two different coupler hoses to evaluate the affect that coupler shape has on airflow.
Quick AnalysiseBay Intercooler for Mk7 GTIMeasuring the dimensions and internal volume of an eBay sourced stock location intercooler for the Mk7 GTI.
Testing>AirflowStock Airbox with Stock TIPAirlfow through the Mk7 GTI stock intake comprising the stock airbox, accordion hose, and turbocharger intake pipe is measured on the flowbench.
EditorialMk7 GTI PCV Breather HoseThe VW Mk7 GTI PCV Breather Hose attachment to the Turbocharger Inlet Pipe is a real fun part to separate when removing the TIP from the Turbocharger.
Testing>AirflowAPR Intake Airflow TestAPR Carbon Fiber Intake for the Mk7 GTI is placed on the flowbench to measure the amount of airflow through the aftermarket intake part.
Testing>AirflowAPR Intake with Stock Turbocharger Inlet PipeAPR Carbon Fiber Intake is tested with the Stock Mk7 GTI Turbocharger Inlet Pipe to evalaue airflow through the intake components.
Testing>AirflowAPR Intake with APR Turbo Inlet PipeAPR Carbon Fiber Airbox is flow tested along with the APR Turbocharger Inlet Pipe to compare with results obtained when measuring the same airbox with Stock TIP.
Testing>AirflowMk7 GTI Turbo Inlet Pipe EvaluationAPR Carbon Fiber Airbox and APR Turbocharger Inlet Pipe are compared with the Mk7 GTI stock airbox with aFe Dryflow filter and stock GTI turbo inlet pipe.
Quick AnalysisIE Intercooler Pressure Drop AnalysisIntegrated Engineering Mk7 GTI and Golf R intercooler is compared with a stock Golf R intercooler for differences in pressure drop.
Quick AnalysisVibrant Baun Performance FMIC Flow AnalysisThe Vibrant Performance Intercooler core is the product featured in the GTI-Jake FMIC for the Mk7 GTI. An analysis of the claimed air flow is performed.
TestingeBay FMIC Flow TesteBay Front Mount Intercooler for the Mk7 GTI is put on the flow bench to determine how airflow compares with other Mk7 GTI Intercoolers.
Testing>TemperatureMk7 GTI Stock Intercooler Cruise TemperatureThe Mk7 GTI stock intercooler is taken on a routine drive to record Intake Air Temperature and then assess how well the intercooler controls the IAT.
Testing>TemperatureMk7 GTI Stock Intercooler Drive Part 2Mk7 GTI Stock Intercooler taken on a loop drive to assess how the Intake Air Temperatures are affected when the GTI is accelerating rapidly.
Testing>TemperatureMk7 GTI Stock Intercooler Drive 3Evaluating Intake Air Temperture changes on a VW Mk7 GTI equipped with a stock intercooler and comparing with previously recorded IAT.
ModificationseBay FMIC v2 InstalledeBay Front Mounted Intercooler for the VW Mk7 GTI is installed with some minor modifications to the under tray needed. IC is configured as a twintercooler.
Testing>TemperatureMk7 GTI eBay FMIC First DriveeBay FMIC for theVW Mk7 GTI is installed in parallel with the Stock GTI intercooler in a Twintercooler configuration and Intake Air Temperature is measured.
Testing>TemperatureMk7 GTI eBay FMIC Drive ComparisonComparing Intake Air Temperature measured during drives performed with the Mk7 GTI Stock Intercooler and with the addition of an eBay FMIC.
Testing>TemperatureMk7 GTI eBay FMIC Minus Stock ICMk7 GTI eBay Front Mount Intercooler is taken for a test drive to record intake air temperature under typical driving conditions.
Testing>AirfloweBay DF Flow TestFlow test is conducted using an eBay direct fit intercooler for the Mk7 GTI. Results of the airflow test from the flowbench are compared with other ICs.
Testing>AirflowTIP Ranking Round 1Turbocharger inlet pipes for the Mk7 GTI MQB engine are undergoing testing on a flow bench to rank the airflow performance of the provided products.
ModificationseBay FMIC v2 installed picseBay Front Mount Intercooler installed on my 2016 VW Mk7 GTI. Showing how hard it is to see the black FMIC core behind the bumper grill.
Testing>AirflowTIP Ranking Round 2Turbocharger Inlet Pipes for the Mk7 GTI and Golf R are evaluated on a flowbench for airflow performance and compared to one another.
Testing>AirflowTIP Ranking Test ChangeTurbo inlet pipe ranking results thus far lead to changes in the test methodology to try and better represent IS20 and IS38 turbocharger inlet dimensions.
ModificationseBay Seller 1st-racinguk IC Fail1st-racinguk sells a "direct fit" replacement intercooler for the Mk7 GTI. I purchased one and attempted to install it finding multiple fit issues.
Testing>AirflowTIP Ranking Round 3Turbocharge Inlet Pipes from APR, Burger, CTS, Induct, Leyo, MST, Neuspeed, Unitronic are flow tested and compared for maximum airflow measured.
Testing>AirflowAPR Carbon Fiber "Hose"The APR Carbon Fiber Inlet Hose that replaces the stock accordion hose on the Mk7 GTI MQB engine is tested for affect on maximum airflow through the TIP.
Testing>AirflowInduct Performance Intake System Flow TestInduct Performance Air Intake System and Turbo Inlet Pipe are tested using a flow bench to evaluate any changes compared to stock Mk7 GTI intake parts.
Testing>AirflowAPR Naked Airbox Flow Test
Quick Analysis|Testing>AirflowRacingLine Performance Inlet Elbow AnalysisRacingLine Performance VRW Turbo 90 Inlet elbow flow results are analyzed to compare with TIP ranking results and vendor results from APR and Unitronic.
Testing>AirflowMST Performance Inlet Elbow v2
Testing>AirflowMore Stock Airbox Work - Duct TestModification to the plastic channel that leads into the airbox is a common change made to the Mk7 GTI and Golf R intakes. This modification is flow tested.
Testing>AirflowMk7 Inlet Elbow Large Bore Adapter TestA larger bore adapter is used to connect Mk7 GTI Turbo Inlet Elbows to a flow bench to measure airflow performance versus a stock IS20 size adapter.
Testing>AirflowAirflow Velocity Uniformity Check - Part OneTurbo inlet elbow airflow velocity at the product outlet is evaluated for uniformityon products from APR, Unitronic, Frankenturbo and Burger Motorsports.
Testing>AirflowAirflow Velocity Uniformity Check - Part IITurbocharger Inlet Elbows for the VW Mk7 GTI are tested on the flow bench to evaluate how uniform teh airflow exiting the elbow is.
Testing>TemperatureMk7 GTI Underhood Cruising TemperatureRecording of the underhood temperature on a Mk7 GTI is undertaken with two RTD temperature sensors and datalogging equipment. Measurements are evaluated.
ModificationsCoilover Height AdjustmentAdjusting the height of ST coilovers on my Mk7 GTI posed a few challenges requiring a spanner wrench, channel locks, and oil filter wrench.
Testing>AirflowAPR CF Inlet Pipe Airflow TestThe APR Carbon Fiber Inlet Pipe is evaluated on the flowbench to determine if airflow changes compared to the stock Mk7 GTI accordion intake pipe.
Buying ModifiedTow Hook Cover ReplacementLosing the Tow Hook Cover from a Mk7 GTI is not an uncommon occurence. This post details the steps I took to make a 3D printed replacement tow hook cover.
Buying ModifiedToned Down ExhaustAdding quieting components to the AWE Tuning Track Edition exhuast and catless CTS downpipe for the Mk7 GTI to quiet the volume level.
Buying ModifiedMagnaflow MufflerMagnaflow's muffler unit is installed inline on my AWE Track edition catback exhaust (Mk7 GTI) in order to try and tone down the volume of the exhaust note.
Modification ResearchDSG Tune Comparison: APR versus EurodyneAPR versus Eurodyne DSG transmission control unit TCU evaluation of the Mk7 GTI with DSG tranmssion and DSG tunes by APR and Eurodyne.
EditorialMQB Apex ARC-8 Wheel PollApex is looking into developing a wheel set for the MQB platform and is gauging interest in bringing this product to market.
Testing>BoostBoost Onset BaselineA method for measuring turbocharger boost onset of the Mk7 GTI IS20 turbocharger and other available turbochargers is presented and explained.
Testing>AirflowMk7 GTI Stock Intercooler Flow TestFlow bench testing of the Mk7 GTI Stock Intercooler to measure airflow rates and compare with other available intercoolers.
Testing>TemperatureCommute Temperatures 1Underhood temperature inside the engine compartment is measured with two RTD probes during daily driving activities to asses magnitude and variation.
Testing>TemperatureCommute Temperatures 2Engine compartment temperature readings are made to evaluate how the temperature inside the Mk7 GTI engine compartment varies with location.
Testing>TemperatureCommute Temperatures 3
Testing>TemperatureCommute Temperatures 4Fourth installment of the series of temperature readings being taken within the engine compartment of the Mk7 GTI.
ModificationsTTRS Brake Caliper ConversionAudi TTRS Brake Calipers with Vagbremtechnic adapters are installed on a Mk7 GTI for use with 17" SSR Competition lightweight wheels.
EditorialIntake RestrictionsForum discussion about air intake systems leads to disagreement over what differeing levels of pressure losses produce in overall system loss.
Testing>AirflowIntegrated Engineering Cold Air Intake Airflow TestIntegrated Engineering Cold Air Intake for the Mk7 is measured on the flowbench to determine the airflow through the intake compared with a stock Mk7 GTI
Testing>AirflowMk7 GTI Stock Airbox Airflow BaselineSearching for the best air intake for the Mk7 GTI involves measuring the stock air intake system along with various aftermarket options.
Testing>AirflowS&B Cold Air Intake Flow TestS&B Filter Cold Air Intake is flow tested as part of the search for the best Mk7 GTI intake. Flow results of the S&B Intake are compared to other intakes.
Testing>TemperatureAir Intake Temperature EvaluationSearching for the best air intake for the Mk7 GTI moves from airflow testing to evaluating the intake air temperature at the IS38 turbocharger inlet elbow.
Testing>TemperatureIntegrated Engineering Temp Measurement 1Integrated Engineering Cold Air Intake is driven with a Mk7 GTI to measure turbocharger air intake temperature during the course of two drives.
Testing>AirflowTurbo Muffler Delete TestingTurbo muffler delete is a common modification of the Mk7 GTI, but does a turbo muffler delete provide the performance gains claimed by vendors?
Testing>TemperatureIntegrated Engineering Temp Measurement 2Intake air temperatue readings entering the turbocharger are recorded for the Integrated Engineering Cold Air Intake on my VW Mk7 GTI.
Testing>Airflow|Testing>TemperatureIntegrated Engineering Temperature SummarySummary of performance data for the Integrated Engineering Cold Air Intake for the VW Mk7 GTI as measured on the flowbench and the street.
Testing>TemperatureInduct Performance Intake Temperature MeasurementsInduct Performance Air Intake System for the Mk7 GTI is installed and temperature sensors placed to record air intake temperature on my Mk7 GTI.
Testing>TemperatureInduct Performance Intake Day 1Temperature readings with the Induct Performance Air Intake System are shown for the first day of the data collection using my Mk7 GTI.
Testing>AirflowGTI IC plus eBay FMIC Flow Testebay FMIC for the Mk7 GTI is combined with a stock GTI intercooler and the combination is flow tested to find the change in airflow versus the GTI alone.
Testing>TemperatureIntake Air Temperature Worst CaseTurbocharger intake air temperature is recorded during high ambient temperatures following a previous drive to heat the GTI engine compartment.
Modifications034 Motorsport Turbo Muffler Delete034 Motorsport Turbo Muffler Delete for the Mk7 GTI is installed on my GTI along with an RTD sensor that fits into a pre-existing port on the 034 TMD.
ModificationsShuenk IS38+ TurbochargerShuenk's IS38+ Turbocharger is described as an OEM+ upgrade over the stock IHI IS38 found on the Mk7 Golf R. A beta IS38+ is to be evaluated on my Mk7 GTI.
Testing>TemperatureTurbo Outlet TemperatureIHI IS38 turbocharger outlet temperatures are measured with an RTD temperature probe installed in a 034 Motorsport Turbo Muffler delete on my Mk7 GTI.
Testing>AirflowAPR Carbon Fiber Intake RetestAPR Carbon Fiber Intake and Turbo Inlet Pipe are returned to the flow bench for airflow testing using an adapter to simulate the IS20 and IS38 turbochargers
Testing>AirflowRacingline VWR R600 Cold Air Intake Flow TestRacingline VWR R600 Cold Air Intake system for the Mk7 GTI is placed on the flow bench to determine airflow compared with other Mk7 GTI airbox options.
Testing>TemperatureInduct Performance Temperature SummaryInduct Performance Air Intake System for the Mk7 GTI is measured for affect on Intake Air Temperatures going to the Turbocharger.
Testing>TemperatureS&B Intake System Commute Temperatures Day 1S&B Air Intake System for the Mk7 GTI is installed and temperature readings taken of the air temperature leaving the S&B intake airbox and pipe.
Testing>AirflowRacingline R600 with MST Performance Replacement FilterRacingline R600 Intake airbox with MST Performance replacement Air Filter is put on the flowbench to compare the foam filter with fabric replacement.
Testing>AirflowNeuspeed IS38 FMIC Flow TestNeuspeed IS38 FMIC for the Mk7 GTI is installed on the flow bench to determine how much airflow this stand alone front mount intercooler flows.
Testing>AirflowMST Performance Intake Parts AnalysisMST Performance Intake Components are paired with the Racingline R600 airbox to measure airflow through different inlet elbow options and turbo compressors.
ModificationsTurbo Swap In ProgressThe Shuenk OEM+ IS38 turbocharger will be installed in my Mk7 GTI to record performance data of the car when using this aftermarket turbocharger.
Testing>AirflowEventuri Intake Flow TestEventuri's Carbon Fiber Intake for the VW Golf Mk7 GTI and R is placed on the flow bench to measure the airflow through the intake.
EditorialTurbo Inlet Pipe InstallationA short DIY video explaining the process for installing a turbocharger inlet pipe / elbow on the turbo of a Mk7 GTI.
ModificationsShuenk IS38 Turbo First DriveBoost onset with the Shuenk OEM+ IS38 turbocharger is logged during an initial drive after swapping the turbocharger into my VW Mk7 GTI.
Modification ResearchShuenk IS38 OEM+ Turbo Boost DataShuenk OEM+ IS38 turbocharger is taken out for a second drive in cooler weather to gather some additional boost onset data.
Testing>TemperatureS&B Intake Temperature SummaryS&B Intake for the Mk7 GTI is installed and a series of drives are made to gather pre-turbocharger intake air temperature data. Results are shown on a chart.
ModificationsWastegate First Adaptation of Charge Pressure Actuator - P2563Wastegate actuator setting on my IS38 turbocharger with VCDS. First time adaptation and dealing with P2563 Turbocharger Boost Control Position Sensor Fault.
Testing>TemperatureAPR Intake Commute Temperatures - InitialAPRs Carbon Fiber Intake for the Mk7 GTI is installed on my VW to collect pre-turbocharger inlet air temperatures during daily commute driving conditions.
Modification ResearchMk7 GTI Stock Intercooler VolumeMk7 GTI Stock Intercooler volume is measured compared to the eBay direct fit intercooler followed by an evaluation of the likelihood of turbo lag occurring.
ModificationsEurodyne DSG TCU Tune Part 2Eurodyne DSG TCU tune is being datalogged to characteritze how the transmission control logic responds to driver input. The ED tune is not very responsive.
EditorialEQT DSG Transmission TuneEquilibrium Tuning Mk7 GTI DSG TCU Tune is recorded during daily driving and the engine speed and pedal position at which gear shifting occurs is shown.
Testing>TemperatureRacingline R600 Intake Commute Temperatures - InitialRacingline R600 Intake Commute Pre-turbocharger Intake AIr Temperatures during the first day commute.
Testing>TemperatureAPR Intake Temperature SummaryAPR Carbon Fiber Air Intake is used during a daily commute and pre-turbocharger air temperature is recorded for comparison with other aftermarket intakes.
Modification ResearchEQT DSG TCU Tune DownshiftingEquilibrium Tuning DSG TCU tune for the Mk7 GTI is data logged and downshift engine speeds are plotted for different starting gears.
DSG TCU TunesStratified Automotive Control DSG TuneStratified Automotive Control DSG TCU Tune for the Mk7 GTI is logged with shift points being illustrated on charts to show upshift and downshift behavior.
Testing>TemperatureAPR Intercooler Loop Drive
ModificationseBay bi-cooler and Unitronic intercoolereBay bi-cooler Front Mount Intercooler and Unitronic direct fit replacement intercooler being used together on my Mk7 GTI to assess intake air temperature.
Modification ResearchBest Mk7 GTI IC Finders Fee $$$Search for the best Mk7 GTI intercooler and willing to pay a finders fee for evidence that supports showing which intercooler is the best.
Testing>BoostShuenk IS38+ Turbo First Full PullFirst solid pull with the Shuenk IS38+ turbocharger for the Mk7 GTI. Turbo is paired with the Eurodyne IS38 base adjustable file.
Testing>TemperatureMk7 GTI Intercooler Outlet TemperatureMk7 GTI Intercooler Outlet Temperature is recorded and compared with the GTI stock Intake Air Temperature sensor reading.
Testing>TemperatureAir Conditioned Commute TemperaturesRecording intercooler outlet temperatures during a daily commute with the Mk7 GTI air conditioner on and then off to compare temperatures.
Modification ResearchSensor Housing ProgressDesigning and building an airflow and temperature sensor housing to enable measurement of the affect a Mk7 GTI intake scoop has on intake air.
Testing>AirflowIntegrated Engineering Turbo Muffler vs StockIntegrated Engineering Turbo Muffler is tested on the flow bench for airflow versus a stock Mk7 GTI turbo outlet muffler.
Testing>TemperatureVWR R600 Intake Temperature ResultsVWR R600 pre-turbo intake air temperatures are recorded during a daily commute and compared with other Mk7 GTI air intake options.
Testing>TemperatureEventuri Intake Temperature First Drive
ModificationsRear Performance Pack Caliper Swap Part 1The Mk7 GTI Performance Package Rear brake calipers and rotors are installed on my non-performance package GTI. Stainless steel brake lines are also installed.
ModificationsMk7 GTI PP Caliper Swap - Part 2Swapping the rear calipers and rotor discs of the Mk7 GTI performance package to my non-performance package GTI.
DSG TCU Tunes034 Motorsport Mk7 GTI DSG TCU Tune Review034 Motorsport Mk7 GTI DSG TCU Tune Review. From my initial impression and feedback to 034 to my thoughts on the 034 revised tune.
Testing>AirflowUltimate Mk7 GTI Air IntakeThe Mk7 GTI air intake system is modified with aftermarket parts to compare airflow with top performing aftermarket cold air intakes.
Testing>TemperatureEventuri Intake Temperature CompositeEventuri intake air system for the Mk7 GTI is installed while measuring the air temperature entering the GTI turbocharger. Composite results are shown.
Quick Analysis|Testing>TemperatureShuenk IS38+ Boost and TempsShuenk IS38+ Turbocharger is logged to record intercooler outlet temperature and compare with the GTI reported intake air temperature.
Testing>TemperatureAir Scoop PreparationsAir Scoop for the Mk7 GTI is installed in the grill using an Eventuri scoop. Temperature probes are installed along the intake to measure intake temps.
Testing>AirflowAPR Intercooler Airflow MeasurementAPRs Mk7 GTI intercooler is mounted to the flow bench to record airflow through the intercooler charge air path. Airflow results are compared to other ICs.
Testing>TemperatureIntitial Drive Stock GTI Airbox Commute TempsIntake air temperatures readings during morning and afternoon drives are taken with a stock Mk7 GTI intake to compare with several aftermarket intakes.
Testing>AirflowMk7 GTI Charge Pipe EvaluationMk7 GTI aftermarket charge pipes are advertised to increase airflow. Several charge pipe options are flow tested and compared versus stock GTI charge pipes.
Modification ResearchShuenk IS38+ Turbo DynoShuenk IS38+ turbocharger dyno results for other cars. Collection of dyno sheets from cars using the Shuenk IS38+ turbocharger.
Testing>TemperatureMk7 GTI Stock Airbox Final Commute TemperaturesStock GTI airbox air temperature into the turbocharger is recorded over several days of commuting and compared with aftermarket intakes.
Testing>Temperature|Modification ResearchAir Scoop Commute Temperature TestAn Eventuri air scoop for the Mk7 GTI is installed to determine if intake air temperature is reduced with the addition of the air scoop to the grill.
Testing>AirflowStock Airbox-Filter with MST PartsA Stock Mk7 GTI Airbox and Stock Air Filter are flow tested along with with MST Performance Intake Parts to compare airflow with the aFe air filter.
Testing>AirflowLT Motorsport FMIC Flow TestLT Motorsport sells a FMIC for the Mk7 GTI. One of these intercoolers is attached to the flow bench to measure airflow compared to other intercoolers.
Testing>AirfloweBay DF with eBay FMIC Bicooler Flow TesteBay direct replacement intercooler and eBay FMIC configured as a Bicooler are attached to the flow bench for airflow testing.
Testing>AirflowAir Scoop Airflow TestThe air scoop for the Mk7 GTI is installed to test if pre-turbocharger pressure drop is changed with the presence of the scoop in the GTI grill.
Testing>TemperatureAirbox Insulating Wrap TestModifying a Mk7 GTI air intake to see if insulating wrap lower the pre-turbocharger intake air temperature. Pipe Wrap Insulation is applied to an Eventuri.
Testing>TemperatureAir Scoop IC DataIntercooler outlet temperatures recorded during third gear pulls using the Mk7 GTI air scoop are compared between the scoop being open and closed.
ModificationsShuenk Turbo DV Sandwich PlateShuenk turbo sent a diverter valve sandwich plate spacer along with a prototype turbocharger inlet elbow to have me evaluate how the parts fit on my GTI.
Testing>TemperatureFMIC vs DF IC Loop DriveMk7 GTI FMIC versus direct replacement stock location intercooler along a semi-controlled loop recording various temperatures to determine IC efficiency.
Testing>BoostAir Scoop Boost OnsetAir scoop boost onset test is peformed on a Mk7 GTI to determine if the air scoop affects the boost onset rate for the turbocharger.
Testing>AirflowAir Scoop Throttle ResponseA Mk7 GTI air scoop is run through a throttle response test to determine if the scoop has an affect on the throttle response.
DSG TCU TunesEQT DSG TCU Tune KickdownEQT DSG TCU Tune Kickdown behavior is logged during operation of a Mk7 GTI to characterize the eagerness of the tune to shift to lower gears.
Testing>TemperatureFrost King Intake First DriveFrost King wrapped Eventuri intake is driven during a daily commute to evaluate the pre-turbocharger intake air temperature.
Testing>TemperatureFrost King Temperature Summary
Testing>AirflowMST Performance Intake System Flow TestMST Performance Mk7 GTI Intake System undergoes flow bench testing to compare airflow values with other cold air intakes for the Mk7 GTI.
Testing>AirflowTurbo Intake Hose Flow TestVWR Intake hose versus the Stock Mk7 GTI intake hose in a flow test comparison using a Turbo Inlet Pipe simulator and direct to flow bench.
Testing>Airflow034 Motorsport Turbo Inlet Elbow034 Motorsport provides an aftermarket turbocharger inlet elbow for the Mk7 GTI. A sample TIP was provided to take part in an airflow test.
Testing>AirflowIE Turbo Inlet ElbowA Integrated Engineering Turbocharger Inlet Elbow for the Mk7 GTI has been received from IE to conduct flow bench airflow testing with.
Testing>AirflowDBV2 Turbo Inlet ElbowDBV2 manufacturers an aftermarket turbocharger inlet elbow for the Mk7 GTI. DBV2 provided one to take part in air flow testing with other intake pipes.
Testing>AirflowTurbo Inlet Pipe Test Second WaveTurbocharger inlet elbows from 034 Motorsport, Integrated Engineering, and DBV2 are measured on the flow bench and compared with MST Performance.
Testing>AirflowInlet Elbow Flow Test Round Two - Large AdapterAdditional airflow testing of the DBV2, Integrated Engineering, 034 Motorsport, and MST Performance inlet elbows on a flow bench with a large adapter.
DSG TCU TunesEQT v2 DSG GearshiftEQT v2 DSG TCU tune is driven in a Mk7 GTI and shift points are datalogged to characterize shift patterns and behavior.
Testing>AirflowAPR DF plus eBay Front Mount Intercooler Flow Test
Testing>Airflow034 and IE Elbow Velocity Investigation034 Motorsport and Integrated Engineering Turbo Inlet Pipes are flow tested to evaluate velocity uniformity exiting the turbo elbow outlets.
Testing>AirflowTIP Adapter Flow TestAdapters used during turbocharger inlet pipe airflow testing are checked for maximum airflow values without inlet elbows being attached.
ModificationsAdding Fuel Pressure HeadroomThe stock high pressure fuel pump on my GTI was showing signs of not keeping up with the Shuenk IS38+ turbocharger so an HPA HPFP is to be installed.
Modification ResearchUnderhood Temp Prep
Testing>TemperatureUnderhood TemperaturesTemperature at various locations inside the engine compartment of my Mk7 GTI are recorded during a routine daily commute.
DSG TCU TunesAPR DSG TCU Tune DataData logging with the APR DSG TCU tune for the Mk7 GTI DQ250 transmission. Reviewing upshift and downshift behavior with the APR TCU tune.
Testing>AirflowUnitronic IC Flow TestUnitronic Mk7 GTI stock location intercooler is flow tested to measure airflow and pressure drop across the intercooler and compared with other Mk7 GTI intercoolers.
Testing>AirflowRam Air Test Preparations
Testing>AirflowAirflow Testing "Open" IntakesSome candidates for the "open" intake category are tested to see how their airflow performance compares when tested on the flow bench.
EditorialFlow Bench Testing Air Intakes
DSG TCU TunesCobb Sport DSG TuneThe Cobb Sport DSG TCU tune for the VW Mk7 GTI is recorded under varying conditions and control logic is presented in chart form.
Testing>AirflowRam Air Results
Modification ResearchDSG TCU TuningContinuing the search for a great DSG TCU tune on my VW Mk7 GTI. With 034 Motorsport development on hold I look for other DGS tuning options.
DSG TCU TunesStratified DSG Tune RevisionStratified Automotive Controls Mk7 DSG TCU Tune is being refined based on suggesions and the first revision of the base file is test driven.
Testing>AirflowRam Air Part II
Modification ResearchForge Motorsport Day
DSG TCU Tunes5150 DSG Tuning - Week 1 Progress
ModificationsDyno Progress CheckShuenk IS38+ turbocharger dyno results after completing stock fueling tuning of my VW Mk7 GTI. Wheel horsepower on a Dynojet is measured with the Shuenk IS38+ turbocharger
ModificationsHPA HPFP CheckoutAn HPA High Pressure Fuel Pump is installed on my MK7 GTI to address a drop in fuel rail pressure during tuning of the Shuenk IS38+ turbocharger.
Testing>AirflowForge Motorsport Turbo Inlet Pipe Flow TestForge Motorsport supplied me with several of their parts for the Mk7 GTI to include the Forge Turbo Inlet Pipe. Flow testing is performed with the part.
Testing>AirflowForge TIP Flow Test Part 2Forge Motorsport Turbo Inlet Pipe is hooked up to a flow bench using a large adapter to measure airflow through the elbow and a Forge silicone intake hose.
DSG TCU Tunes5150 DSG Tuning - Week 2 Progress5150-Racing is custom tuning a TCU file for my GTI's DQ250 DSG transmission. The first base file along with an initial revision have been installed. this week.
Testing>AirflowForge Motorsport Intake Flow Test
Testing>AirflowFact or fiction: Stock Airbox
Modification Researchdo88 Intercooler Unboxingdo88 Performance provided their stock replacement intercooler for the Mk7 GTI for an upcoming intercooler performance evaluation. Here it's being unboxed.
Testing>AirflowForge Motorsport Bicooler Flow TestForge Motorsport Bicooler is taken to the flow bench to measure airflow readings of the intercooler standalone and along with the stock Mk7 GTI intercooler.
Testing>TemperatureIC Temp Testing: Trial 1
DSG TCU Tunes5150 DSG Tuning - Week 3DSG Tuning with 5150 is being documented as a series of blog posts to describe the process and progress toward a customized DSG tune.
Testing>Airflow034 Cold Air Intake Flow Test
Modification ResearchForge Intercooler Delivery
Modification ResearchIC Temp Testing: Trial 2
DSG TCU Tunes5150 DSG Tuning - Week 4
Modification ResearchIC Temp Testing: Trial 3
Testing>Airflowdo88 Intercooler Flow Testdo88 intercooler for the Mk7 GTI is tested on a flow bench for pressure drop performance and airflow then compared to other stock location intercoolers.
DSG TCU Tunes5150 DSG Tuning - Week 5
Modification ResearchIC Temp Testing: Trial 4
Modification ResearchIC Temp Testing: Trial 5
Testing>AirflowForge Intercooler Flow TestThe Forge stock location intercooler for the Mk7 GTI is subject of a flow test to measure pressure drop across this aftermarket intercooler
Testing>AirflowMishimoto Intercooler Flow TestMishimoto stock location intercooler for the Mk7 GTI is flow bench tested to measure airflow and pressure drop and compare with aftermarket intercoolers.
DSG TCU Tunes5150 DSG Tuning End5150 Racing Mk7 GTI TCU Tuning. The custom DSG tuning project with 5150 Racing has reached an end without completing the project due to other priorities.
DSG TCU TunesStratified DSG Tune Revision - V3
DSG TCU TunesStratified DSG Tune Revision V4Stratified Automotive Controls has been making some updates to their TCU tune for the DQ250 DSG transmission in the MK7 GTI, these are the latest changes.
Modification ResearchWagner-Tuning Intercooler SpecsWagner Tuning Competition Intercooler for VW Mk7 is measured to determine the IC core depth.
Testing>AirflowVibrant 12810 Intercooler Flow TestThe Vibrant Performance 12810 Intercooler is offered for use on the Mk7 GTI by JD Eurosport and Baun Performance. The Vibrant intercooler is flow tested.
Testing>AirflowAMS Performance Intercooler Flow TestAMS performance intercooler undergoes flowbench airflow testing to compare pressure drop versus other intercoolers available for the Mk7 GTI.
Testing>AirflowUSP Tear-Duct Intake Airflow Test
DSG TCU TunesStratified DSG Tuning v5
Quick AnalysisDragy Time Result Resolution
Testing>AirflowStock Charge Pipe Airflow - Part 2
Testing>AirflowRevo Turbo Inlet Hose Flow Test
Testing>Airflow|Quick AnalysisInstant Test: Cold Side Charge Pipe Flow
ModificationsHPA HPFP Slow Start
Modification ResearchProject: Bicooler Upgrade
Testing>TemperatureUSP Boost Tap Caution
Modification ResearchProject: Bicooler Upgrade Candidates
Testing>TemperatureIntake Duct Block Off Plate TestTesting to determine if the air intake temperature inside the Mk7 GTI airbox changes when covering the opening at the back of the inlet duct.
Testing>TemperatureIntake Manifold External Temperatures
Modification Researchdo88 IAT Logsdo88 intercooler for the Mk7 GTI is logged when using the EQT Vortex turbocharger to evaluate the intake air temperature when in high boost.
Modification ResearchProject: Bicooler Upgrade First Round CutsTreadstone TR8L and Vibrant 12810 intercoolers, along with an ECS Tuning FMIC, are compared with one another as candidates for use as a Mk7 GTI bicooler.
Testing>TemperatureEngine Compartment Temps - Weather Seal RemovalEngine compartment temperatures measured near the turbocharger and map sensor with the weather seal strip in place and removed.
Testing>TemperatureUnderhood Temps Near Oil FilterTesting is done to evaluate the affect that opening the passenger side intake duct has on the engine compartment underhood temperatures of a Mk7 GTI.
Modification ResearchIE Intercooler Poor Performance ClaimIE intercooler poor performance claims are researched with an evaluation made of data showing a comparison of integrated engineering and AMS ICs.
Quick AnalysisIE Intercooler Claim - Part2The Integrated Engineering intercooler cooling performance of a hybrid turbocharger output air is evaluated by analysis against expected performance.
Testing>TemperatureIC Temp Testing: Trial 6
DSG TCU TunesStratified DSG Tuning v6
Modification ResearchProject: Bicooler Upgrade First Direct Comparison
Testing>TemperatureAC and Intercoolers
TestingMk7 Intercooler: Stock vs UnitronicUnitronic's intercooler is compared with the stock GTI intercooler to determine how the two stack up with respect to cooling efficiency and airflow.
Testing>TemperatureClosed Intake Turbo Inlet TempsMk7 GTI closed air intake system is used to measure the turbo inlet temperature during a series of wide open throttle pulls to set a temperature baseline.
Quick AnalysisIC Temperature Drop LogIntercooler charge air temperature drop is measured by a temperature sensor located in the cold side charge pipe and the GTI IAT sensor.
Testing>TemperatureAMS Performance Intercooler Bench CoolingAMS Performance intercooler is subject of a bench air temperature cooling test to evaluate how well the AMS intercooler compares with the stock Mk7 GTI IC.
Testing>TemperatureSemi-Open Intake Turbo Inlet Temps
DSG TCU TunesStratified DSG Tuning v7Stratified Automotive Controls TCU tune for the Mk7 GTI DQ250 DSG has been undergoing revisions to improve the transmission behavior. This is revision 7.
Testing>TemperatureForge Motorsport Intercooler Bench TestingForge Motorsport Mk7 GTI intercooler is evaluated using a bench cooling test and compared with other aftermarket intercoolers for combined perfomance.
EditorialIntercooler Bench Test MethodAddressing concerns raised about the Mk7 GTI intercooler bench testing being used to identify candiate systems for on vehicle testing.
DSG TCU TunesStratified DSG Tuning v8
Testing>BoostBicooler Turbo LagBicooler turbocharger lag was a concern that prompted a boost onset test to determine if the Majesty FMIC bicooler causes turbo lag for the Mk7 GTI turbo.
Testing>TemperatureAPR Intercooler Bench Cooling TestAPR intercooler for the VW Mk7 GTI is subject of a bench cooling performance test to see how it compares with other aftermarket intercoolers for the GTI.
Testing>TemperatureClosed Filter-On-A-Stick Inlet TemperaturesMST Performance Intake for the Mk7 GTI is installed with the cover on the air filter enclosure to measure the temperature to the turbocharger during a pull.
Testing>TemperatureOpen Intake Turbo Inlet TemperatureMST Performance intake housing is removed to expose the air filter to the engine compartment. Air temperature entering the turbocharger is recorded at WOT.
ModificationsOne Year Update: Shuenk IS38+ TurboSummary of the first year operating my Mk7 GTI with the Shuenk IS38+ Turbocharger. Review how the turbocharger has been operated and held up to tuning.
ModificationsUnitronic to APR Intercooler SwapThe Unitronic intercooler is removed from my Mk7 GTI to make room for the APR intercooler. Detailed performance data under conditions I am interested in will be collected.
DSG TCU TunesStratified TCU Tune PreviewStratified Automotive Controls has been making revisions to the Mk7 GTI DQ250 DSG TCU Tune. This is a preview of the changes delivered with the update.
Testing>AirflowSnow Guard Flow Test Part 2The snow guard grate installed in the Mk7 GTI stock airbox is removed to test airflow with an aFe filter and MST inlet hose and turbo inlet pipe.
Testing>TemperatureMishimoto Intercooler Bench Cooling TestMishimoto intercooler for the Mk7 GTI is bench tested to compare cooling performance with other aftermarket intercoolers for the GTI.
Testing>TemperatureeBay Tube & Fin Intercooler Bench TestAn eBay brand stock location tube and fin intercooler for the Mk7 GTI is bench cooling tested and compared with aftermarket intercoolers for the Mk7 GTI.
Testing>TemperatureStreet Battle: APR vs UnitronicIntercooler performance data comparing the APR and Unitronic stock location intercoolers for the Mk7 GTI after recording street temperature data.
Testing>TemperatureIntegrated Engineering Intercooler Bench TestIntegrtaed Engineering intercooler for the VW Mk7 GTI is subject of a bench cooling efficiency test and compared with other aftermarket intercooler cooling.
Testing>TemperatureIAT Sensor Lies
Testing>AirflowIntegrated Engineering Flow TestIntegrated Engineering intercooler for the Mk7 GTI and Golf R is flow tested and compared with other aftermarket intercoolers available for the Mk7 GTI.
Fact CheckingIE IC V2 - Change ReviewIntegrated Engineering V2 intercooler claims for the Mk7 GTI are evaluated to assess if there is data to support the claims.
DSG TCU TunesStratified DSG Tuning v9
DSG TCU TunesStratified DSG Tuning v10
Modification ResearchAPR to IE Intercooler Swap
ModificationseBay Bicooler Hose SpacereBay bicooler hoses sometimes have issue fitting to the stock GTI intercooler. This silicone sleeve is how I addressed the issue.
Testing>TemperatureStreet Battle: APR vs IEIntegrated Engineering intercooler compared with the Audi Performance and Racing intercooler on the street using an IS38 turbo on my Mk7 GTI.
Testing>Temperaturedo88 Intercooler Bench Cooling Testdo88 intercooler for the VW Mk7 GTI is subject of a bench cooling test and compared with other aftermarket intercoolers for the Mk7 GTI.
Modification ResearchIE Intercooler Claim - Part IIIClaims that the Integrated Engineering intercooler performs poorly are investigated through a data analysis of vehicle data logs.
ModificationsIE to do88 Intercooler SwapThe Integrated Engineering intercooler is removed from my Mk7 GTI to be replaced by a do88 intercooler so that testing can continue.
Testing>AirflowMST vs Stock Inlet ElbowsMST Performance and Stock Mk7 GTI Turbo Inlet Elbows are compared using a stock airbox with aFe filter and aftermarket turbo inlet hoses.
Modification ResearchBlanket PreparationsPreparing various underhood sensors to monitor temperature and pressure of the engine compartment of my Mk7 GTI during turbo blanket testing.
Testing>TemperatureStreet Battle: do88 vs IEdo88 intercooler and Integrated Engineering intercooler street pull data is the basis for a cooling performance comparison.
Testing>Airflow034 Carbon Fiber Intake Flow Test034 Carbon Fiber Intake for the Mk7 GTI is subject of a flow bench airflow test comparing it with other aftermarket intakes.
Testing>AirflowSXTH Element Turbo Inlet Elbow Flow TestSXTH Element Engineering sent a Turbo Inlet Elbow and Turbo Inlet Pipe for the Mk7 GTI to have air flow testing performed to compare to other TIPs.
DSG TCU TunesStratified DSG Tune v14Stratified Automotive Controls has been making revisions to the Mk7 GTI TCU tune. This is the fourteenth revision and last that I will give feedback about.
Testing>AirflowCTS Stock Location IC Flow TestCTS stock location intercooler for Mk7 GTI is flow tested to evaluate pressure drop against other aftermarket intercoolers available for the GTI.
Modification ResearchBicooler BluesBicooler options for the Mk7 GTI receive mixed opinions, the post looks at the facts of bicooler performance.
Modification ResearchProject Bicooler: PTE CandidatePrecision Turbo and Engine Front Mount Intercooler is flow tested and bench tested for cooling efficiency to compare with other IC options.
Quick AnalysisAnalysis: Burger Motorsports IntercoolerBurger Motorsports Intercooler for the Mk7 GTI is analyzed on the basis of cooling performance against the Integrated Engineering intercooler.
ModificationsTurbo Blanket InstallInstalling a Forge turbocharger blanket on the IS38 turbocharger that my Mk7 GTI is equipped with. Testing the turbo blanket is next.
Testing>BoostTurbo Blanket Spool Up EvaluationTurbo blanket claims of faster spool up, reduced turbo lag, and earlier peak torque are tested by comparing IS38+ boost onset times.
Testing>TemperatureTurbo Blanket Spool Test TemperaturesEngine compartment and air intake temperatures are compared during turbocharger blanket boost onset testing with an IS38 equipped Mk7 GTI.
Testing>TemperatureTurbo Blanket Long Drive TemperaturesTest and Evaluation of turbocharger blanket affects on underhood temperature and air intake temperatures on a Mk7 GTI.
Modification ResearchExhaust Wrap Install On DownpipeDEI Titanium Exhaust Wrap is applied to the downpipe on my Mk7 GTI in preparation for testing to record underhood engine compartment temperatures.
Testing>TemperatureExhaust Downpipe Wrap Drive EvaluationDEI Titanium exhaust pipe wrap is used on the Mk7 GTI downpipe from turbo to flex joint and engine compartment temperatures are recorded.
ModificationsCTS Intercooler InstallCTS stock location intercooler for the Mk7 GTI / Golf R is installed in preparation for recording street data.
Testing>TemperatureCTS Intercooler Bench Cooling TestCTS stock location intercooler for the Mk7 GTI is bench tested for cooling efficiency and compared to other GTI intercoolers.
DSG TCU TunesStratified DSG Tune v12Continuing the revisions to the Stratified Automotive Controls DSG TCU tune for the MK7 GTI. Focus of this update is 6th to 5th gear downshifting.
Testing>AirflowAPR Intake with MST Hose and TIPAPR Carbon Fiber Mk7 Intake is modified with AEM air filter and MST inlet hose and turbo inlet pipe to determine affect on airflow.
ModificationsShuenk IS38+ Bearing CheckChecking the bearing play of a Shuenk IS38+ turbocharger for my VW Mk7 GTI after a year in operation. With the downpipe removed the check was good.
Quick AnalysisTurbocharger Intake TemperaturesTurbocharger Intake Temperatures are investigated for an affect on turbocharger wastegate duty cycle versus pressure drop from intercooling.
Quick AnalysisFMIC Hurts AC PerformanceFrount mounted intercoolers degrade air conditioning system performance is a claim that is tested by measuring the air temperature between the two parts.
Modification ResearchMore Air Scoop TestingThe air scoop for the Mk7 GTI is a modification to the grill that is supposed to allow direct cool air into the air intake system.
Testing>AirflowFlow Test vs Vehicle Pressure DropFlow bench flow test data for several intercoolers is compared with vehicle operating pressure drop readings to assess how well they compare.
Modification ResearchProject Bicooler: ARM Motorsports FMICARM Motosports intercooler for the Mk7 GTI is unpackaged and prepared for installation onto my GTI for possible use as a Bicooler.
Testing>TemperatureExtended Intercooler Bench Testing TrialsTest of several methods for conducting an extended cooling test using a flow bench and stationary cool air supply along with regulated hot air supply.
Testing>AirflowARM Motorsports FMIC Flow TestARM Motorsports Front Mount Intercooler for the Mk7 GTI is flow tested on the flow bench and airflow readings compared with other FMICs.
Testing>AirflowNeuspeed Re-doNeuspeed's Mk7 GTI / R Frount Mount Intercooler is tested again for airflow readings in preparation for on-vehicle pressure drop testing.
Testing>TemperatureARM Motorsports FMIC Bench Cooling TestARM Motorsports FMIC is configured for a bench cooling efficiency test and the results are compared with the Vibrant 12810 intercooler.
ModificationsEQT Custom Tuning UpdateEQT is developing a custom tune for my Shuenk IS38+ turbo equipped GTI. This post is a status update on the tuning progress with the HPA HPFP.
Testing>TemperatureNeuspeed FMIC Bench Cooling TestNeuspeed Front Mount Intercooler for the Mk7 GTI is subject of a bench cooling efficiency test and compared to other aftermarket intercoolers.
Modification ResearchIntegrated Engineering IC ComparisonIntegrated Engineering intercooler version 1 and version 2 are obtained to conduct comparison tests to see if, and how, these products differ.
Testing>AirflowInjen Mk7 Intake Flow TestInjen Mk7 intake is tested for airflow performance and the receives a small modification to the coupler to check for airflow changes.
Modification ResearchIntegrated Engineering V2 and V1 IC Comparison PicturesIntegrated Engineering V2 and V1 Intercoolers are compared in pictures to show differences in dimensions and construction.
Testing>AirflowIntegrated Engineering V2 Intercooler Flow TestIntegrated Engineering V2 Intercooler Flow Test. The IE revised Mk7 intercooler is the subject of an airflow test.
Testing>TemperatureIE Intercooler V1 vs V2 Bench Cooling TestIntegrated Engineering Intercooler V1 vs V2 Bench Cooling Test. Temperature rise rate and steady state temperature are compared.
ModificationsIE V2 Intercooler InstallA prerequisite to recording street data is to install the Integrated Engineering v2 Intercooler on my Mk7 GTI.
Fact CheckingIE IC V2 - Change Review - Detailed Version
EditorialIntegrated Engineering V1 vs V2 IC Street DataIntegrated Engineering V1 and V2 intercoolers are logged on the street and results are compared for temperature and pressure drop differences.
ModificationsARM FMIC BicooledARM Motorsport front mounted intercooler for the Mk7 GTI is setup to work as a bicooler with the stock GTI intercooler.
TestingARM FMIC Street DataARM Motorsports Front Mounted Intercooler for the Mk7 GTI is installed and measured for cooling and pressure drop performance in operation.
Quick AnalysisTemperature, Pressure, and WorkLooking at temperature changes caused by the Injen intake with a partition and the ARM FMIC combined with the stock IC as a bicooler.
Modification ResearchIntake Investigation
DSG TCU TunesDSG Data Translation
Testing>AirflowDBV2 Charge Pipe Flow TestingDBV2 Charge Pipes and Stock GTI Charge Pipes are flow tested to compare pressure drop across full pipes and individual pipes.
Modification ResearchPrecision Turbo and Engine Intercooler
Quick AnalysisDBV2 Charge Pipes - Part 2
Fact CheckingComments AnalysisAnalysis of a discussion about airbox airflow performance by a former Integrated Engineering employee.
Editorialdo88 Intake Unboxingdo88 sent me an intake lid, inlet hose, and turbo inlet elbow, to perform flow testing with. Here is the unboxing of the package.
Modification ResearchTreadstone TR8C IntercoolerTreadstone TR8C Intercooler is a candidate to use as part of a bicooler setup. This is a first look and flow test of the intercooler.
Quick AnalysisHood ClearanceHood to grill clearance is a source of concern to owners seeking to modify their GTI intake for maximum airlfow. Play-Doh answers the question.
Testing>AirflowMk7 Intake Manifold Flow TestMk7 GTI Intake Manifold is subject of a flow bench flow test. Individual runner and combined airflow is measured.
Testing>AirflowTreadstone TR8C Flow Test 2
Modification ResearchMk7 GTI Stock IC EvaluationThe Mk7 GTI stock intercooler is compared with an aftermarket intercooler to evaluate how well the stock IC cools compared to aftermarket.
ModificationsEthanol Mix TimeEthanol E30 tune transition process to pump gas and watching the change in mixture ratios over time is the point of discussion in this post.
ModificationsBicooler SwapIntegrated Engineering v1 intercooler is paired with a Majesty FMIC in a bicooler arrangement.
Testing>TemperatureCTS Intercooler Street DataCTS Mk7 Stock Location Intercooler is tested on the GTI operating on the street for cooling and pressure drop performance.
ModificationsFuel-It! Ethanol Content AnalyzerInstall of the Fuel-It! Ethanol Content Analyzer is part of the preparation for Stratified ECU tuning
Modification ResearchTurbo BrandsList of manufacturers who supply turbochargers for the Mk7 GTI and Golf R.
Testing>AirflowRacingline R600 Cotton Filter Flow TestRacingline R600 Cotton Air Filter for the Mk7 GTI is subject of an air flow test and compared with other aftermarket intakes.
Testing>AirflowEventuri with MST inlet hoseEventuri intake is flow tested using an MST inlet hose and TIP to compare to previous results with a Racingline hose
Testing>AirflowDownpipe Flow TestStock Mk7 GTI downpipe and the USP Motorsport downpipe are subjects of a flow test to evaluate how they compare.
TuningStratified E30 Tuning - Base FileStratified E30 tuning effort is started upon receipt of a base ethanol file for my GTI. Acceleration data is recorded for analysis.
Testing>AirflowCTS Turbo Intake Flow TestCTS Turbo 3.5" Intake for the Mk7 GTI is attached to a flow bench to measure airflow and compare to other GTI intakes.
Testing>AirflowCTS Intake Flow Test - Part 2CTS Turbo 3.5" Intake for the Mk7 GTI is modified with a larger silicone adapter to fit the MST inlet elbow.
EditorialMk7 ECU Tuning OptionsComprehensive list of Mk7 ECU tuning options. Various vendors offer tunes for the GTI and Golf R, here are some of them.
EditorialMk7 GTI Fuel Line RemovalTips for removing the Mk7 GTI fuel line at the connection near the coolant reservoir.
Fact CheckingKickoff: Fact CheckingFact checking is conducted by applying test and evaluation processes to product claims and enthusiast statements to gauge how well the claims are met.
Testing>TemperatureTreadstone TR8L Street DataTreadstone TR8L FMIC is part of the JD Eurosport Intercooler Kit. Street temperature data is recorded for evaluation.
TuningStratified E30 Tuning – rev1Stratified Automotive Controls E30 tuning on my Mk7 GTI. Results for the first revision with increased boost pressure.
Quick AnalysisIs the modified stock airbox as good as aftermarket?Comparing the flow performance of a modified stock airbox with drop in filter against an aftermarket intake with different turbocharger configurations.
Testing>AirflowWagner Tuning Intercooler Flow TestWagner Tuning Competition intercooler for the Mk7 GTI is subject of an airflow / pressure drop flow bench test and compared with aftermarket intercoolers.
TuningStratified E30 Tuning – rev2Stratified Automotive Controls custom Ethanol E30 tuning on my Mk7 GTI. Here is the second revision to the base file that adjusts timing during boost onset.
Editorial|ModificationsWagner Tuning Competition Intercooler InstallWagner Tuning Competition Intercooler for the Mk7 GTI is installed on my GTI to record cooling performance and pressure drop during street logging.
EditorialApex Race Parts Mk7 Group BuyApex Race Parts VW Mk7 Group Buy is finally live after two years. Aftermarket wheels to clear most big brake kits and support track enthusiasts.
Modification ResearchBicooler vs Aftermarket Stock LocationBicooler for the VW Mk7 GTI is compared with aftermarket stock location intercoolers to see if the bicooler performs worse or better versus the stock locations.
Quick AnalysisSub-Ambient IATSub-ambient intake air temperature is possible under the proper conditions. Understanding what these are can help to properly interpret Cobb Accessport data.
Testing>TemperatureWagner Intercooler Street DataWagner Tuning Competition Intercooler for the Mk7 GTI is tested for street cooling performance and temperature drop compared with other aftermarket IC options.
TuningStratified E30 Tuning - rev 3Stratified E30 tuning of my Mk7 GTI with IS38 turbocharger moves onto the third revision. This revision a closer look is made at the low pressure fuel supply.
Quick AnalysisContact Patch DeterminationWhat size is the Mk7 GTI stock Austin wheel contact patch? Traction issues led to an investigation to calculate the contact patch size on my GTI.
TuningStratified E30 Tuning - rev 4Stratified customer E30 tune for my IS38 turbocharger is onto revision number four. This posts looks at logged engine data and acceleration to evaluate progress.
Modification ResearchStock DV versus BOVBOV versus stock DV - Aftermarket Blowoff valves are popular for the sound they make, but is the OEM Mk7 Diverter Valve best? Testing both seeks to answer that question.
Testing>TemperatureOpen Intake vs Closed Intake ContinuedOpen intake versus closed intake test is conducted to evaluate how the pre turbocharger air temperature affects turbo wastegate duty cycle.
TuningStratified E30 Tuning – rev 5Stratified Automotive Controls E30 ethanol tuning process with my VW Mk7 GTI. This is a progress review of the fifth revision of the E30 Custom Tune.
Fact CheckingFact Check - Vendor Claim StandardsFederal Trade Commission Truth In Advertising guidelines are reviewed to determine applicable guidelines for claims by aftermarket performance parts vendors.
Testing>AirflowMk7 Exhaust Flow TestMk7 GTI full turboback exhaust with CTS turbo downpipe, catalytic converter, vibrant resonator, magnaflow muffler, and AWE track exhaust is flow tested.
Testing>AirflowaFe Power Charge Pipe Airflow Test - Part IaFe Power BladeRunner charge air pipes for the Mk7 GTI are flow tested to compare flow performance with the stock Mk7 GTI charge air pipes.
Testing>TemperatureFMIC vs SMIC | AC OnFMIC vs SMIC outlet air temperatures with the air conditioning system operating are compared for a stop and go test drive route to compare intercooler performance.
Modification ResearchARM DownpipeARM Motorsport downpipe for the Mk7 GTI is obtained to conduct performance evaluations with other catted downpipes.
Testing>Airflowdo88 Turbo Inlet Elbow Flow Testdo88 Turbo Inlet Pipe for the Mk7 GTI is flow tested to determine airflow and compare the results with other aftermarket turbo inlet elbows.
TuningStratified E30 Tuning - rev 6Stratified Automotive Controls E30 custom tune for my Shuenk IS38+ equipped Mk7 GTI. This is the sixth revision of the custom road tuning process.
Testing>AirflowMk7 GTI Stock Exhaust Flow TestThe Mk7 GTI stock exhaust is flow tested and compared with an aftermarket exhaust to compare the flow rates measured when paired with a Trackslag downpipe.
Modification ResearchTechnical Service Bulletin 21E7Technical Service Bulletin 21E7. On Audi A3 vehicles manufactured within a specific period the turbocharger may fail causing the MIL to illuminate.
Testing>AirflowCTS 3.5" Downpipe Flow TestCTS Turbo 3.5" Cast Downpipe for the Mk7 GTI is subject of a flowbench flow test to measure airflow through the downpipe using different configurations.
ModificationsShuenk IS38+ 2 years in serviceShuenk IS38+ turbocharger passes two years in operation on my Mk7 GTI supporting various test activities and a dyno session as well as 93 octane and E30 tuning.
Quick AnalysisDemographics Poll: Power SetupPoll to gauge the power level of enthusiasts who visit this website and some of the Mk7 GTI, Golf R, and Sportwagen enthusiast groups.
ModificationsApex Wheel ArrivalApex wheels for the Mk7 GTI are delivered at the conclusion of a group buy that is the culmination of a two year development effort.
Testing>AirflowARM Motorsport Downpipe Flow TestARM Motorsport catted downpipe is subject of a flow test to measure the airflow through the downpipe and compare with other MK7 downpipes.
Fact CheckingDV vs BOV Research: No Data RequiredComparison of operating Air-to-fuel ratio of a Mk7 GTI equipped with the stock diverter valve and an aftermarket Forge blow-off valve.
Testing>BoostCTS vs ARM Downpipe - Boost OnsetBoost onset might be affected by downpipe design choices. The CTS Turbo and Arm Motorsport downpipes are compared on the GTI for affect on spool time.
Testing>Airflowdo88 Intake System Flow Testdo88 intake system for the mk7 gti is flow tested to determine the airflow through a fully assembled intake. The do88 airbox is also compared to do88 test results.
Testing>TemperatureStock Mount vs Front Mount Intercooler Initial CoolingStock location and front mount intercooler affect on temperature drop is evaluated. A route with stops is driven and intake air temperature is compared.
Testing>AirflowMore Mk7 Turbo Muffler Delete Flow TestingMk7 Turbo muffler deletes (TMD) sold for the GTI are tested on the flow bench to compare how aftermarket turbo muffler deletes compare with the stock turbo muffler.
Testing>Airflow034 Motorsport "Insuction Bundle" Air Intake Kit034 Motorsport Insuction Bundle air intake kit for the Mk7 GTI is subject of a flow test and compared with the MST Performance turbo inlet kit and aFe air filter.
Testing>TemperatureMk7 GTI Stock Intercooler Heat SoakMk7 GTI Stock Intercooler Heat Soak is quoted as a problem leading to conclusions that the GTI IC sucks. This post looks at IC efficiency and recovery times.
Testing>AirflowTrackslag Downpipe Flow TestTrackslag Mk7 downpipe is flow tested to compare with other aftermarket downpipes. The 4" Trackslag catted downpipe is compared with ARM Motorsport and CTS Turbo.
Modification ResearchGarrett GT2260S Turbo Inlet ElbowGarrett GT2260S turbocharger for the Mk7 has a detachable turbo inlet elbow that has been measured to build a flow bench adapter for. Flow testing the Garrett TIP will be next.
Testing>TemperatureTreadstone TR8C Too Much AirflowTreadstone TR8C intercooler is installed on a Mk7 GTI along with an Integrated Engineering stock location intercooler. Bicooler performance is measured.
Quick AnalysisDragy vs Cobb APDragy GPS acceleration meter is compared with the Cobb Accessport to see how well the Cobb generated engine speed data compares with GPS based vehicle speed.
Testing>TemperatureIE + Majesty BicoolerIntegrated Engineering v1 intercooler is matched with a Majesty Front Mounted Intercooler for the Mk7 GTI. Intercooler outlet temperature is evaluated.
Modification ResearchTurbo Muffler Delete FinaleTurbo muffler delete is compared to a stock GTI turbo muffler to determine if acceleration is improved. TMDs are also flow tested using an IS20 turbocharger.
ModificationsBaun Performance MidpipeBaun Performance mid-pipe with AWE fitment is ordered for my GTI to help support downpipe testing. Baun Performance was able to ship this mid-pipe quickly.
Modification ResearchAPR Intake vs Modified Stock: Street TestAPR intake for the Mk7 is compared with a modified stock GTI airbox to evaluate acceleration performance and affect on engine parameters.
Testing>AirflowAPR PEX Intake Flow TestAPR PEX open intake review including flow tests of the intake and comparison with other aftermarket performance intakes. APR intake is combined with other parts.
Testing>TemperatureAPR PEX Intake - Road TestAPR Pex Open Intake is subject of a street test to record intake air temperature prior to the turbocharger. Stock airbox temperatures are measured and compared.
Modification ResearchSnow Guard - Water Barrier TestSnow guard for the Mk7 airbox is being tested to see if it helps to prevent water entry to the airbox and impingement of water on the air filter.
Testing>BoostTrackslag vs ARM Downpipe Boost OnsetTrackslag downpipe for the Mk7 GTI is swapped out with the ARM Motorsport downpipe to evaluate the affect on boost onset times. Ambient air temperature differences prevented a valid comparison.
Modification ResearchIntercooler Volume and Performance CorrelationIntercooler volume is routinely referenced as a measure of how well an intercooler might perform. Using intercooler volume for this purpose is not advised.
Testing>AirflowVargas Charge Pipe TestVargas Turbo Technologies charge pipes for the Mk7 GTI and Golf R are flow tested and compared to the stock GTI charge pipes to evaluate airflow gains.
EditorialARM Motorsports Mk7 Intake Flow TestARM Motorsports Mk7 open intake is tested to measure airflow through the intake using a flow bench. Airflow is compared with other Mk7 intake products.
Testing>Airflow|Modification ResearchR600 Intake Flow Test IIR600 intake for the Mk7 GTI is subject of a flow test to evaluate how changing intake components can affect overall airflow through the intake.
Fact CheckingFact Check: Turbo Parts Canada BB IS38Turbo Parts Canada IS38 Ball Bearing turbocharger claims are investigated to determine how well the claims are substantiated.
Modification ResearchGFB DV+ advantage versus Stock DV?Go Fast Bits Diverter Valve Plus (GFB DV+) is a supplemental component for use with the Mk7 GTI stock Diverter Valve. The valve is supposed to improve performance.
Fact CheckingCanadian Advertising GuidelinesCanadian advertising guidelines that relate to claims about product performance and requirements to substantiate claims by way of tests.
Fact CheckingTurbo Parts Canada IS38 Ball-Bearing Turbo: Information CampaignTurbo Parts Canada sells a ball-bearing IS38 turbocharger for the Mk7. Information provided by the business about the product fails to meet Canadian advertising guidelines.
DSG TCU TunesDSG Tune Shiftpoint DiscussionDSG tune shift points for the Mk7 GTI DQ250 transmission are discussed in a video and several charts showing examples of shift points are provided.
Fact CheckingTPC IS38 BB: ProgressTurbo parts Canada is38 ball bearing turbocharger product description is subject of a discussion with TPCs owner with positive progress being made.
Modification ResearchTPC IS38 BB Performance Claim AnalyzedTPC IS38 (Turbo Parts Canada IS38) ball-bearing turbocharger. Claims from the manufacturer are assessed if they are likely to be realized based on compressor map analysis.
Testing>TemperatureIntercooler Test TrendsIntercooler tests of various options for the Mk7 GTI are compared showing the variation of temperature delta for different IC placements and configurations.
Modification ResearchSnow Grate Water Barrier Test - Part 2Snow grate test for water passage to the air filter. Test goal is to determine if the grate inside the Mk7 airbox prevents water from reaching the air filter.
Modification ResearchSnow Guard Water Test - Part 3Snow guard test results after driving the GTI during rainfall spanning several days and different driving conditions. Water indicator strips are viewed.
Modification ResearchTrackslag vs ARM DP - Street DataTrackslag 4 inch downpipe for the Mk7 GTI is compared with an ARM Motorsport downpipe to evaluate how each downpipe affects GTI acceleration.
Testing>TemperatureBicooler & Intercooler Heavy LiftingBicooler and stock location stand alone intercooler are used to support data logging of parts during heavy acceleration. Cooling performance is compared.
Testing>BoostTurbo Inlet Elbow Boost Onset TestTurbo inlet elbows are hypothesized to improve turbocharger boost spool up. The stock GTI inlet elbow is compared with an aftermarket inlet elbow to check boost onset.
Quick AnalysisMk7 GTI Oil Pressure LoggingAn oil pressure gauge was installed in my GTI and I have connected the pressure sender signal to a data logger to observe trends in the oil pressure while driving.
Quick AnalysisOil Pressure - ContinuedContinuing to log oil pressure with my Mk7 GTI to understand how the oil pressure is varied by the engine computer under different operating conditions.
Modification ResearchMk7 GTI Stock Airbox Modification TestingMk7 GTI stock airbox is subject to modifications to try and increase the airflow through the air intake. Holes are added to learn if additional airflow is allowed.
Testing>AirflowTurbo Inlet Hose Flow TestTurbo inlet hose flow test is performed to compare aftermarket inlet hoses with the stock Mk7 GTI inlet hose for flow performance.
Testing>TemperatureBicooler with Air Conditioning OnMk7 GTI Bicooler with air conditioning on is evaluated to determine how the intake air temperature is affected when the air conditioner is on.
Testing>AirflowARM Motorsport Cat-less DP Flow TestARM Motorsport provided a sample of their Mk7 cat-less downpipe to conduct a flow test with. Results are compared with the stock GTI downpipe.
Testing>AirflowStock Airbox Chamber Flow TestThe airbox chamber at the back of the Mk7 GTI stock airbox is tested to determine if the chamber has an effect on the airflow through the stock airbox.
EditorialCustom Performance Engineering Mk7 Mounts ReviewCustom Performance Engineering mounts for the Mk7 are reviewed. Installation and experience with the cp-e engine and transmission mounts for the Mk7 GTI is discussed.
DSG TCU TunesIntegrated Engineering Mk7 DSG TuneIntegrated Engineering Mk7 GTI DSG tune review. The IE TCU tune for the DQ250 DSG is reviewed and analyzed.
Testing>AirflowAir Duct Flow Testing - ContinuedMk7 GTI air duct is subject of a flow test to determine how different configurations of the air duct affect airflow into the stock airbox.
Quick AnalysisIntake Dyno Test - AnalysisIntake dyno test was done using a number of Mk7 aftermarket intakes along with the stock airbox to measure changes in horsepower and torque.
EditorialAftermarket Intake Manifold IAT Sensor DisplacementAftermarket intake manifolds for the Mk7 might change the exposure of the intake air temperature, IAT sensor, to air within the manifold.
Testing>BoostARM Motorsport Catless Downpipe Boost OnsetARM Motorsport catless downpipe is installed on my Mk7 GTI to test how quickly boost pressure builds compared to catted downpipes from ARM and Trackslag.
Testing>Temperaturedo88 + TR8C Bicoolerdo88 + TR8C bicooler temperature rise test with a comparison to other bicooler intercoolers that have been installed on the Mk7 GTI.
Testing>TemperatureStock IC Cruising IATCruising IAT can be misleading when assessing the cooling performance of an intercooler. The stock GTI IC is evaluated during cruising to compare IC out with IAT.
Testing>TemperatureMid-term IC ComparisonAPR, do88, and IE intercooler upgrades for the Mk7 GTI are measured to record intake air temperature rise during a third gear pull. Results are compared.
Testing>TemperatureMk7 GTI Stock Airbox Modification Testing - Part 2Mk7 GTI stock airbox modification is continued. The airbox outlet air temperature with holes in the airbox is compared with a stock GTI airbox.
Testing>TemperatureDownpipe Area Air TemperatureDownpipe area air temperature is the subject of this post. A temperature probe is located over the downpipe and recorded during routine driving.
EditorialCTS Open Intake Air TemperatureCTS open intake is installed on the GTI and pre-turbo air temperature is measured to compare with a closed stock airbox. Intake air temperature is compared.
Testing>AirflowAftermarket Intake Manifold Flow TestAn aftermarket intake manifold flow test was peformed using a prototype Mk7 intake manifold and the results were compared with the Mk7 GTI stock intake manifold.
Quick AnalysisCobb Tune - OTS IS38 GTICobb tune for the Mk7 GTI with an IS38 is installed on my Mk7 to record performance data. Figures are compared with a customer EQT tune.
Testing>AirflowIntercooler External AirflowIntercooler external airflow for several stock location and FMIC intercoolers for the Mk7 GTI are flow tested to help gauge impact on radiator performance.
Fact CheckingEquilibrium Tuning's Best IntercoolerEquilibrium Tuning recommends teh best cooling intercooler for the Mk7 GTI. I investigate to find out if the claim about the best intercooler is valid.
Fact CheckingEQT Best IC - Part 2EQT recommends to consumers the best intercooler for the Mk7. This post examines the claims and evaluates the credibility of the EQT recommendation.
Testing>AirflowIC External Airflow - Baun & ARMExternal airflow is measured using a flow bench through an ARM Motorsport FMIC and Vibrant Baun Performance intercooler to compare with other intercoolers for the Mk7 GTI.
Fact CheckingUK Advertising GuidelinesUK advertising guidelines are helpful to be familiar with so that claims made by companies selling aftermarket parts in the UK can be assessed against these standards.
Modification ResearchIntake Power GainsIntake power gains is a regular topic of discussion in what's the best intake debates. Intakes don't make power is the consensus, this post discusses a test to evaluate the claims.
Fact CheckingNeuspeed FMIC Fact CheckNeuspeed FMIC fact check investigates how truthful the marketing claims by Neuspeed are and if they are substantiated. Federal Trade Commision act is referenced.
Testing>AirflowGolf R IC Flow TestGolf R IC is subject to flow testing to measure external cooling airflow and pressure drop across the intercooler. Comparison is made with GTI and aftermarket ICs.
Quick AnalysisIS38 using IS20 TuneUsing an IS20 tune with an IS38 turbocharger is the focus of this experiment to see what the results are. Regular driving and hard acceleration are test conditions.
Testing>AirflowHPA Intercooler Flow TestingHPA intercooler for the Mk7 is flow tested to measure the airflow through the external and internal fins to compare with other aftermarket intercoolers.