Cam recommendations for stock ls3 with 2.9l whipple
 

I'm in the middle of doing a build which I decided to take my stock ls3 and add the whipple 2.9l supercharger to it. My engine currently has a Texas speed cam #tsp229236 since my engine is out of my car I thought maybe it would be a good time to do the cam prior to adding the supercharger so they can work with each other correctly. Any recommendations would be great!


Thanks!
Corey

I love my cam which was recommended by tsp so if I was you that is the person I would ask.

Ideally you'd want something with a wider lobe separation angle for forced induction. LS3 heads are really lacking on flow on the exhaust side, so you're going to want a solo duration cam.

Are you looking for set and forget or max effort?


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Fixed my mistake.


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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

Suggest going to Camaro5.com and asking the question. There are a lot of folks running whipplechargers on 5th Gens there with cams.

Cam recommendations for stock ls3 with 2.9l whipple
 

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.

Cam recommendations for stock ls3 with 2.9l whipple
 

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.

Meant to say LS9 cam.

211/230 588/588 119or121 LSA. Are the specs off the top of my head. Is a good cam for square port LS with forced induction.

It's not the most power you're going to get, but generally, I find most people would trade the peak 40hp bragging rights for never having to mess with the innards again.


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The LPE GT9 cam works well for me. But you need to upgrade the entire valve train -- and use light valves -- to make it all last. My build was ground up so that was no problem... other than expensive.