6cm = ~.61 A/R. posted by Chip(GinnMotorsports) on January 04, 2003 at 09:05 AM
Message
Isn't it.. 7cm is around .54 and 8cm is around .64 isn't it?
And you can have to small of exhaust housings which is still a mismatch. The turbo is going to flow so much less than Pentroof manifold can handle that there is probably not going to be much gain to the Pentroof manifold itself.