Miscellaneous tests and other stuff that doesn’t fit neatly into other categories.
Also, topics that frequently are raised in discussions.
DV Stuff
Stock DV versus BOV – How well does a BOV perform compared to the stock DV.
Stock vs Turbosmart – Comparison of response times of the Turbosmart valve versus stock DV.
Stock vs DV+ – Does the DV+ provide measurable benefits versus the stock Diverter Valve?
GFB T9381 DV+ – Discussing my experience with the T9381.
DV Spacer vs BOV sound – In-cabin recording of sound from the ECS DV spacer and Forge BOV.
BOV vs Open Intake – In-cabin sounds from a Forge BOV versus IE V2 Open Intake.
DV vs BOV Analogy – Explaining why a DV doesn’t recirculate excess pressure to help build boost back faster.
Counterfeit DV+ – Showing the performance difference between a Genuine GFB DV+ and a counterfeit product
- DV Spacer Leaking Investigated – Using and measuring boost with a DV spacer.
- More DV Spacer Investigation – A second look at understanding the misconception that the DV spacer causes boost leaks.
Intake Stuff
Stock airbox modification – Flow testing the Mk7 stock airbox with additional holes.
Stock airbox modification (continued) – Street logging temperature with the stock airbox that has holes cut in it.
Stock modified airbox vs aftermarket – Comparing flow performance of the stock airbox vs aftermarket with a larger turbo.
Grill intake scoop – Several tests to investigate what, if anything, the intake grill scoop does.
Searching for Ram Air –
- Air Scoop Airflow Test
- Ram Air Test Prep
- Ram Air Test Results (Early)
- Ram Air Part II
- More Air Scoop Testing
- More Ram Air Testing
- Foglight Duct Test
- MGM7 / Eventuri – Ram Air Research
Intakes & hydro locked engines – Part 1, Part 2, Part 3 – Checking if water gets into the GTI intake.
Intake power gains – Comparing an aftermarket intake to stock to see if acceleration performance changes.
APR vs Modified stock – APR carbon fiber closed intake compared with a modified stock GTI airbox during street pulls.
Block off plate and underhood temperatures – Comparing the underhood temperature near the oil filter with and without blocking the passenger side duct.
Open vs Closed intake air temperatures – Recording the air temperature entering the turbocharger using each type of intake.
Hybrid turbo intakes – Test of the difference a hybrid optimized setup makes.
Duct Modification Testing –
- Stock air duct baseline – Recording pre-turbo air temperature with a stock air duct.
- Modified stock air duct – Modified duct testing during full throttle.
- More modifications to the stock air duct – The stock air duct has more modifications made to it and then air temperatures are measured.
- Part 4 – Modifying the CTS Turbo heat shield.
- Part 5 – Measuring air temperatures without the intake heat shield.
- Part 6 – Measuring air temperature with an IE V2 intake.
- Part 7 – APR PEX intake data analyzed
- Part 8 – Eventuri with MST inlet hose.
- Part 9 – Eventuri with stock inlet hose.
Intake Insulating Wrap –
- Part 1 – Frost King
- Part 2 – Frost King First Drive
- Part 3 – Frost King Comparison Data
Intercooler Stuff
Bicooler outlet temperature with the AC on – Comparing the temperature from the bicooler with a stock location and FMIC with AC operating.
FMIC and SMIC with AC On – Comparing the temperature out of different style intercoolers with the Air Conditioning on.
- FMICs affecting AC – Measuring the temperature between a FMIC and the AC condenser.
- More FMIC effects on AC – Measuring the air temperature out of the AC ducts.
Bicooler blues – Evaluating the performance of a Mk7 bicooler intercooler.
Bicooler vs aftermarket stock location – A comparison of data I’ve logged with each type of intercooler.
Bicooler and SMIC – Temperature trends compared for a sampling of products.
Intercooler test trends – Trends observed using different intercooler configurations on the GTI.
FMIC vs SMIC trends – Overall trends of front mounts and stock mount ICs that I have used.
Tube & Fin Stock Location trends – Comparison of four aftermarket stock location Tube & Fin style intercoolers.
Stock vs Aftermarket ICs – Comparison of the performance of the stock GTI IC and an aftermarket stock location IC.
More Stock and Aftermarket IC – Another comparison of the stock GTI IC and aftermarket products.
Bicooler spacer mod – fitting the Majesty bicooler hose to the stock IC.
Bicooler turbo lag – Comparing boost onset time with and without a bicooler.
Tune Stuff
IS38 turbo with IS20 tune – What happens when driving with an IS38 turbo on an IS20 tune?
Cobb IS38 OTS tune – Comparing the Cobb GTI IS38 OTS tune with a customer IS38 tune from EQT.
Random Stuff
IS20 and IS38 Wastegate Adaptation – The steps I went through to calibrate the wastegate actuator.
IS20, IS38, and Garrett Pmax Comparison – Average WHP and WTQ values for these turbos pulled from other people’s dyno charts.
Custom Performance Engineering Mounts – Review of cp-e engine and transmission mounts for the Mk7.
Turbo Inlet Pipes and Boost – Comparing stock and aftermarket inlet pipe boost onset / turbo spool changes.
IAT Sensor Lies – Measurements from the IAT sensor compared with a temperature sensor at the IC outlet.
IAT During Cruising – Measurements from the IAT sensor during cruising show how the sensor inaccurately reports the temperature leaving the intercooler.
Product Reliability – Discussion of the processes involved with determining a product’s reliability.
Ethanol mix time – After filling the fuel tank with ethanol it takes some time for the content analyzer to show the new percentage of ethanol.
DSG Shift Analysis – Comparing the stock DSG shift times with the time using a tuned file.
DynoJet and Virtual Dyno Comparison – Measurements from a dynamometer session on a DynoJet are compared with Virtual Dyno calculations.
Stock vs aftermarket exhaust – Stock GTI exhaust and Baun aftermarket exhaust are compared by evaluating street data.
- AC Condenser Temps – Measuring the temperature of the Air Conditioning condenser.
- AC Condenser Temps – Part 2
- AC Condenser Temps – Part 3
- AC Condenser Temps – Part 4
Vibration Analysis –
- Mount Vibration Analysis – Comparison of cabin vibration with 034 Street Density mounts and BFI mounts.
- Fluidampr – Vibration and sound analysis before and after installing a Fluidampr.
- Fluidampr plus 034 Density Line mounts – Vibration and sound analysis.