A question prompted by the second round of turbo inlet pipe testing was the maximum airflow rate through the adapters.
To test the airflow rate a bell-mouth was made to attach to the inlet ends of the IS20/IS38 adapter and silicone coupler.
Results
The maximum airflow through the IS20/IS38 adapter was 420 CFM. This is 10 CFM greater than the airflow recorded using the three turbo inlet elbows.
- Turbo Inlet Elbow: 410 CFM
- IS20/IS38 Adapter: 420 CFM
Using the silicone adapter and bell-mouth a reading of 536 CFM was taken. The DBV2 turbo inlet elbow had the highest reading of the elbows tested at 527 CFM.
- DBV2 Inlet Elbow: 527 CFM
- Silicone Adapter: 536 CFM
Safe to say that all the inlet elbows you’ve tested would flow more if the opening to the turbo were larger?
Previously I performed a test with a larger adapter using most of the inlet elbows.
http://mygolfmk7.com/2019/02/mk7-inlet-elbow-large-bore-adapter-test/