05-08-2020, 04:27 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Quote:
Originally Posted by tomshep
The cam card specs are quoted with 1.6 rockers. Is it possible to get 1.5 ratio for those heads? That will tame the cam.
Tom
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Lift has nothing to do with how tame a camshaft is. You need to focus on durations and LSA. All of those work together to create overlap, which is the amount of time both valves are open at the same time. If both valves are open at the same time, no vacuum is being made. If no vacuum is being made then you have reversion. The OP’s cam has 88 degrees of overlap. Normally I would aim for somewhere around 65-70 with these engines while keeping the powerband the same. It’s just a lazy old lobe to keep guys from hurting valve springs and burning pistons up. Crate engine. Assembly line, universal....
An NHRA stock eliminator camshaft can be a very nasty mannered camshaft but in a lot of cases will only have about .400” lift. I can also grind a very docile cam that has .700”-.800”-.900” lift.
Last edited by blykins; 05-08-2020 at 04:32 AM..
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