Without having to change the springs? Working on a budget of course

Comp XR281HR

228/230 .571/.573 112lsa

 

No, you must include valvesprings in your budget.

Why would you EVER want to run an aftermarket cam thats designed for performance with a stock set of valvesprings? Stock springs are designed to be low stress, low performance, 100k mile reliability on a stock lazy camshaft.

 

pac 1218 or pac 1518

 

Thanks for the advice. I was checking out this cam from the CC build, where they used L92 heads and simply upgraded to LS6 springs and ran it. The LS3 heads already have the LS6 springs.

http://www.carcraft.com/techarticles...ads/index.html

 

The stock LS3 springs were designed to work with up to .570 lift. That .571/.573 setup is pushing it. If you had your heart set on using the LS6 springs, physically check your spring clearances. Best bet is to run a set of aftermarket springs recommended for your specific cam.
There is nothing wrong with GMPP's performance cams either. They are a compromise item designed for the most part to conform with the production rules of the classes they race in, emissions, minimal tuning issues, hellified durability testing and such. Aftermarket cam makers are under no such constraints. Considering this, GMPP parts provide excellent and proven performance gains. Even thier valve springs were designed for long term durability in a performance street vehicle. Consider the pounding the rest of the valvetrain, seats, and valve stems are going to take long term from a triple increase in valve spring pressure and a high lift cam and it becomes rather obvious.

 

I'd run better springs than LS6 with that cam. I don't think I've seen anybody swap cams on an LS3 and not upgrade the springs when running more than .550 lift.

 

Thanks Dragon, I had heard the same about the lift, at least from searching here, that is was good up to .580. Lingenfelter actually sells a cam kit with the LS6 springs and their cam, which has lift in the .57X if I remember right.

I'm will most likely upgrade to the 1218's while I have the chance though, just to be safe.

 

"That camshaft in a normally aspirated engine would be fine with the LS6 valve springs.

Thank you,

Tim Dyer

Lingenfelter Performance Engineering"

So many different opinions on the internet, who do you trust?!

 

it is not just the lift that you should be worried about but the ramp rate also. honlestly i would run the asa cam it will work well with the stock springs.

 

Agreed. check out GM's LS3 crate engine numbers with the Hot Cam and ASA cam. A good combo specific tune should net you some great numbers for a street car, and you wouldn't lose the long term reliability of your LS6 springs either.
Besides, the guys at Lingenfelter know what they're doing. They have been messing with GM tuned port engines since thier inception. You can trust thier recommendations at thier word. The thing to remember is that most of these companies "package" thier performance parts as combos. To get the numbers they advertise, you'll need to go with the recommended combination of parts.