Background:
For some time, I have been interested in testing the do88 V2 intake for the Mk7, and I recently contacted the company to see if I could borrow one for testing. They agreed, and a couple of weeks ago I took delivery of the intake system.
The do88 V2 intake is fully enclosed and combines an air filter housing with a full-width air duct.
I have a couple of popular intakes on hand, so I assembled intake parts to test.
Test Procedure:
As with other intakes I have flow-tested, the intakes are attached to an inlet hose, inlet elbow, and adapter that simulates the inlet of a turbocharger compressor. This assembly is then attached to the flow bench and tested at a depression of 28″ of H2O. Airflow through the intake is recorded at this depression.
As the image above shows, I have several inlet hoses and elbows, along with different flanges for the Blaze intake. The stock IHI IS20 and IS38 compressors have a 49 mm inlet, and the hybrid turbo diameter used for this test is 56 mm. These are not the only compressor housing sizes found on turbochargers; they are a couple of representative sizes.
The do88 inlet elbow is sized for a 53 mm turbo inlet, their “Hybrid” option, which will reduce airflow when used with the 56 mm adapter, but it is being tested to show what difference the size mismatch creates. The test result charts show the do88 V2 intake using an elbow sized appropriately for the adapter.
The do88 stock-size compressor cover test uses an MST Performance V1 elbow, and the DBV2 elbow for the hybrid-size compressor cover test.
Test Results:
The video highlights the testing session.
The do88 V2 intake tested with the stock turbo adapter flows 395 CFM @ 28″ of H2O.
The Racingline R600 flowed 395 CFM, and the Blaze AToM flowed 389 CFM.
Note: Testing with the do88 hybrid elbow, which is larger than the stock compressor housing, reduces airflow to 381 CFM @ 28″ of H2O. For stock-size turbo use, do88 offers an elbow with a 48.5 mm outlet, which I expect would increase airflow to near the flow rate measured in this test.
The do88 V2 intake tested with the hybrid turbo adapter flows 502 CFM @ 28″ of H2O.
The Racingline R600 flowed 499 CFM, and the Blaze AToM flowed 387 CFM.
Note: Testing with the do88 53 mm elbow, which is smaller than the 56 mm hybrid flowbench adapter, reduces airflow to 481 CFM @ 28″ of H2O.
Relative to other intakes tested, as of the date of this post, the do88 V2 intake flows similarly to the top-flowing intakes in each configuration tested.
Stock Adapter:
Hybrid Adapter:
Note: The flow rate numbers in this recent test for the R600 and Blaze AToM differ slightly from the rates shown in the chart, which were recorded a couple of years ago. Small variances in the alignment of the intake components can change the flow rate.
Conclusions:
The do88 V2 intake was flow tested using an adapter that simulates the IHI IS20/IS38 turbocharger compressor inlet and a larger hybrid turbocharger inlet. In each test, when outfitted with an appropriately sized inlet elbow, the do88 V2 intake flows similarly to other aftermarket intakes at the upper range of flow rates measured.