The CTS stock location intercooler for the Mk7 GTI was installed and operated on the street to record temperature a pressure drop data.
Operating performance data was recorded during full throttle acceleration in third gear from approximately 2,500 RPM to 6,500 RPM. The GTI is equipped with a Shuenk IS38+ turbocharger producing boost pressure that peaks around 28 psi mid-rpm before tapering off to approximately 24 psi.
Temperature and pressure drop are measured before, during, and after the acceleration runs.
Temperature data over a series of pulls is shown on the chart:
The median temperature rise of six data points produced a 10 degF over ambient result, plotted along with airflow on the next chart:
A composite chart showing bench airflow and bench cooling versus other products is below:
Next is a comparison of airflow measured using a flow bench and pressure drop between the compressor outlet and intake manifold:
The temperature drop median value of 10 degF over ambient is similar to other stock location intercoolers that have been street tested.
Note: The purpose of the bench cooling test is to identify candidate intercooler that are likely to perform well on the car, justifying the time commitment for installation and testing.
Pressure drop on the street averaged 2.7 psi peak, near the middle range of the intercoolers that have had this property measured.