Cam recommendations for stock ls3 with 2.9l whipple

[cjsgarage]

Originally Posted by hdduramaxman

I just want to put the right one in the first time that will work with my combination and still give me that lumpy idle the engine already had before.







Corey

The cam you have won't be awful. But if you're looking for a am that will just work well and have a set and forget style, then think about an LS9 cam. It won't wear out valve springs and it's made for a blower.

If you're looking for a little more max effort, you're looking at something more like what you have, but with a wider lobe separation angle. 233/239 is a good split. Much more duration than that and you're going to push the power band way up the RPM range.

But with a blower you're going to want a 116 or even higher lobe separation. The less overlap will help with the forced induction. What we usually do to help bring the power band down into a usable range is to advance it. An adjustable timing set with +2 or +3° makes it friendly.

But the wide lobe separation takes away from the muscle car sound. The tight LSA is what makes a car idle choppy. The wide LSA will make it idle smoothly. You'll have to fake the cammyness by throwing the idle spark table adjustments.

[cjsgarage]

Originally Posted by cjsgarage

If you're looking for a little more max effort, you're looking at something more like what you have

Forgot to mention, too. Lifts over .575-.600" require periodic valve spring inspection. Cam companies don't really tell you that, but you can't go 45 or 50,000 hard miles on those springs. I like to check a few once a year or so. They wear out (or break) and you start losing valve train control.