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Cobra Forums
2013-14 Shelby GT500
Who has a VMP Gen3 TVS
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<blockquote data-quote="Justin@VMP" data-source="post: 16170372" data-attributes="member: 18468"><p>The cams drop 2-3psi and the 5.8 drops 1-2psi, the 3.0 with a 10% is equivalent to a 2.8 upper pulley only...which is incredibly mild. Assuming your compression ratio is around 8.5-9, I would not be afraid to drop to a 2.8 or 2.7 with your 10% lower. The cams bleed off quite a bit of cylinder pressure at the TQ peak where you are most likely to knock. I don't know what kind of power you are making now, but the builds we have done like yours, made 1000+rwhp on E85 with a 2.4/10% on a box stock VMP Gen3. Given you are on pump gas, that thing should still be a monster.</p></blockquote><p></p>
[QUOTE="Justin@VMP, post: 16170372, member: 18468"] The cams drop 2-3psi and the 5.8 drops 1-2psi, the 3.0 with a 10% is equivalent to a 2.8 upper pulley only...which is incredibly mild. Assuming your compression ratio is around 8.5-9, I would not be afraid to drop to a 2.8 or 2.7 with your 10% lower. The cams bleed off quite a bit of cylinder pressure at the TQ peak where you are most likely to knock. I don't know what kind of power you are making now, but the builds we have done like yours, made 1000+rwhp on E85 with a 2.4/10% on a box stock VMP Gen3. Given you are on pump gas, that thing should still be a monster. [/QUOTE]
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2013-14 Shelby GT500
Who has a VMP Gen3 TVS
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