do88 makes an intake system for the Mk7 that replaces the upper half of the airbox, the accordion hose, and they also provide a turbo inlet elbow.
This test will be to evaluate the airflow through the fully assembled intake, along with using an aFe air filter.
The do88 intake system is assembled and attached to a flow bench. The bench is operated at a test depression of 28″ of H2O and the airflow through the intake is measured.
The do88 intake flows 382 CFM at 28″ of H2O.
This measurement is compared with other intake setups in the chart:
The do88 intake system flows similar to other airbox modifications of this type.
do88 reports flow test results of their intake without the air filter and lower half of the stock airbox. Given that they have modified the top half of the air box, not the lower half, and do not manufacture air filters, it is a sensible arrangement to evaluate. It is however different from the configuration that I normally test intake parts, where I assess the fully assembled intake.
To compare with the results that do88 recorded I removed the lower half of the stock airbox and the air filter. The arrangement flowed 394 CFM @ 28″ of H2O.
The next configuration substitutes a silicone coupler for the turbo housing simulator, this configuration flows 466 CFM @ 28″ of H2O. This compares well with the 455 CFM @ 28″ of H2O that do88 reports.