Background:
HPA sells an upgraded tube and fin style intercooler for the Mk7 to replace the stock location IC.
A fellow Mk7 enthusiast sent me their HPA intercooler to run some tests with.
The first measurements recorded are of the airflow through the external fins and the internal fins using a flow bench.
Test Procedures:
Measuring the airflow through the external fins is described in detail in this previous post. The intercooler is placed on an adapter that seals with the external fins and then air is pulled through the fins until a pressure depression of 10″ of H2O is reached. Airflow at this depression is then recorded. The intercooler is then rotated and the measurement is taken two more times to produce an average value.
To measure the airflow through the internal fins the intercooler is attached to the flow bench using the supplied HPA silicone connector hose. The second hose is attached to the inlet and a bellmouth is inserted into the end of the hose to help smooth the airflow entry to the end tank.
The flow bench is operated at a test depression of 28″ of H2O and the airflow at this pressure differential is recorded.
Test Results:
The external airflow through the HPA intercooler reached 339 CFM @ 10″ of H2O.
This result is shown on the chart along with other intercoolers that have been measured.
The internal airflow measured 249 CFM @ 28″ of H2O.
This is shown on the chart along with other stock location intercoolers.
Conclusions:
The HPA stock location replacement intercooler was tested to measure the external and internal airflow to compare with other intercoolers that have been the subject of these tests.
The HPA flows 339 CFM @ 10″ of H2O externally which is in the lower 50% of intercoolers that have been tested.
The HPA flows 249 CFM @ 28″ of H2O internally which is in the top three (3) of all stock location intercoolers that have been tested.