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JFairman JFairman is offline
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Join Date: Jul 2006
Location: S. Florida
Posts: 7,265
Originally Posted by tj930 View Post
I'm sure that my car used to rev much higher when it had the original cams (who knows - maybe they weren't standard?), but engine used to be dead below 4,000rpm. Had about 2 engine rebuilds since then, though

Who knows - maybe you were running your CIS leaner? (That would make the mid-range much more responsive and the high-range much bumpier!)
Cam timing is probably different.
When they are retarded from stock settings you gain top end horsepower and loose low and mid range power. You're moving the powerband higher because it's acting similar to a longer duration cam on the intake side that way.

Advancing the cams from stock setting gives more low end power or torque, and top end power drops.

New cars have variable valve timing to try and get the best of both worlds.

I'd like to know if anyone has tried 964 cams slightly advanced from the stock setting, and how the power curve works out that way compared to SC cams.
Old 09-02-2008, 12:20 PM
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