78mm or 90mm LSX intake for stock 346 engine?
08-11-2004, 09:14 PM
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78mm or 90mm LSX intake for stock 346 engine? LG recommended 78mm intake with just a ported TB. For a stock 346 ci engine, would this be recommended? Would 90 mm intake and 90 mm throttle body make a difference or are better for larger engines?
Vette includes G5x3 cam, LG headers, AFR 205 heads, and Blackwing.
Vette includes G5x3 cam, LG headers, AFR 205 heads, and Blackwing.
Last edited by DRM C5; 08-11-2004 at 09:32 PM.
08-11-2004, 09:36 PM
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With that cam and heads, I'd go 90mm, especially since you're spending that much money, might as well go big. I keep hearing the 78's don't flow too much better than the LS6's, or at least not enough to justify the price difference.
08-11-2004, 10:34 PM
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We just saw a gain of 8rwhp, and 11rwtq with a 90mm setup over a 78mm ported stock t/b setup. This was on a cam only stock ls6 headed car.
Last edited by TTPMatt; 08-12-2004 at 06:28 AM.