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911nut 911nut is offline
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Join Date: May 2001
Location: Michigan
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Originally Posted by philip j View Post
how about if you ran a higher compression ratio, like 8:1 ? Do you think that would overcome the slow, low end response. Also I think some may have a hard time porting a pancake manifold out to 42mm. Just trying to figure out a few things for my build. thanks Philip
Raising the compression ratio is a solution if your running a cam with some overlap. It won't help much for the lack of proper atomization of the air-fuel mixture due to low velocity/poor swirl in the intake ports.
There's a lot of guys around who've built engines using 38-39 mm ports that make 575-600 fwhp and more. Build an engine with 42 mm intake ports only if you want to run the Texas Mile
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'91 964 Turbo
Port matched, SC cams, K27/K29 turbo, Roush Performance custom headers w/Tial MV-S dual wastegates, Rarlyl8 muffler, LWFW, GT2 clutch & PP, BL wur, factory RS shifter, RS mounts, FVD timing mod, Big Reds, - 210 lb
Old 12-04-2011, 06:46 PM
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