Quote:
Originally Posted by Nux
Do you even need the flap?
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I would say it depends on the build. I had a 3.6L race engine that, due to class rules. had to run a 1995 993 intake and 1 5/8" headers. The flap being open or closed made a difference there.
Soon I will be putting a a 996 GT3 setup on my 369 RWHP 3.6L race engine with AT Power ITBs and 1 3/4" headers. We will do dyno runs with the resonance flap open and closed at 100% throttle to see the differences. We will also do some partial throttle tuning to see what happens with the resonance flap open and closed to how that works out.
I am told that on engines like mine that the flap makes a difference and that difference is not small.