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WinRice WinRice is offline
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Join Date: Jun 2005
Location: Colorado
Posts: 700
Quote:
Originally Posted by 911nut View Post
This is recommended for n/a engines when running cams with a lot of overlap too.
Maybe it's better to leave the stock cams in place and switch to a more efficient turbo like a Garrett GT35.
Thoughts?
Exactly!

When designing a new engine, the engine builder starts with the heads and the cam, matching the cam profile to the flow of the heads. Once that is nailed down, the pistons are chosen that give the proper effective compression ratio, or effective cylinder pressure. Then the intake and exhaust are matched up for the proper flow rates.

Maybe someone can elaborate on the group B turbo, but that's what they did with the cams is optimize the duration as far as the valve train geometry would allow, while maintaining the same lift. This allows more flow, and a would allow a higher flow turbo.
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1986 911 Turbo
3.3L, K27HFS, Tial 46mm, TurboKraft Intercooler, 964 Cams, Monty Muffler, MS3Pro Evo, M&W Ignition, Zietronix WBO2 Data Logger, Wevo shifter, coupler and motor mounts.
Old 01-31-2010, 08:59 AM
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