Background:
Mishimoto turbo inlet pipe / elbow (TIP) is the subject of a flow bench flow test.
Mishimoto provided me with one of their Mk7 turbo inlet pipes so that I could perform a flow test with it and compare the results against those of the stock Mk7 GTI inlet elbow and other aftermarket inlets elbows that I have had access to.
Test Procedure:
The Mishimoto turbo inlet elbow is attached to a flow bench using an adapter that simulates the compressor housing of the IHI IS20 and IS38 turbochargers found in the Mk7 GTI and Golf R.
The inlet elbow is then attached to a stock accordion hose, and the hose is attached to the top half of a stock airbox.
The top half of the airbox is used to help smoothly direct air into the parts without creating a significant restriction to airflow.
The flowbench is operated at a depression of 28″ of H2O and the airflow measured at that pressure is recorded.
The Mishimoto inlet elbow is next tested with an aftermarket inlet hose replacing the stock accordion hose. A 034 Motosport turbo inlet hose is used during this test.
Test Results:
Tested with the stock accordion hose the Mishimoto inlet elbow supported airflow of 390 CFM.
Flow test with the aftermarket turbo inlet hose the Mishimoto supported airflow of 401 CFM.
Conclusions:
The Mishimoto turbo inlet elbow was flow tested and measured 390 CFM @ 28″ of H2O attached to a stock accordion hose as described above.
This measurement is within approximately 2% of the highest reading made thus far and is an 8% increase over the stock Mk7 GTI turbo inlet elbow.
When used with an aftermarket inlet hose airflow increased to 401 CFM @ 28″ of H2O. This is just over an 11% gain versus the stock GTI components.