Background:
Continuing testing of the HPA IC the intercooler is installed on the GTI and logged on the street.
Previously the HPA intercooler was flow tested using a flow bench.
Test Procedure:
Street data is recorded continuously during a drive that includes a series of full-throttle pulls in third gear.
The GTI is equipped with a Shuenk IS38+ turbo using a custom EQT tune that boosts to approximately 28 psi and then tapers to around 23 psi.
Data of interest is logged during full-throttle third gear pulls that begin around 2000-2500 rpm and conclude about 6300-6500 rpm.
Full-throttle acceleration is repeated to gather multiple data points to support calculating sample averages.
Temperature is recorded at the turbo compressor outlet, the intercooler outlet, and the intake manifold.
Pressure is recorded at the turbo compressor outlet and the intake manifold.
Test Results:
The entire drive is shown here:
A close-up of the time when full-throttle pulls were made is shown next:
The average Intake Air Temperature over ambient at 6,000 RPM is 16 degF.
Ambient temperatures during the drive varied from 79-81F.
The pressure drop across the HPA IC averaged 2.3 psi.
The next chart shows the HPA intercooler along with other ICs that have been tested in the same manner:
Conclusions:
The HPA intercooler was measured during street driving and found to produce a temperature delta of 16 degF over ambient.
The HPA pressure drop averaged 2.3 psi at a boost pressure of approximately 25 psi.
The HPA performance was similar to other Tube and Fin style intercoolers from Wagner and do88 that have also been tested.