[Camarowguy]

Originally Posted by 2SSJIM

I don't know the facts but have been wondering if those blown LS3's had the rev limiter removed and rev'd beyond the engines limits resulting in the failure. We only read one side of the story and did not witness what really happened and you know it's never our faults. LOL!

Im gonna be straight up with you, I know I'll have a few people disagree...but that's ok. The ls3 has no valve reliefs on the piston. There are no hard facts as to what the biggest cam you can run in that engine with no piston to valve interference. It seems to be hit or miss. I think this is a big factor in the engine failures. Not all engines and camshafts have the exact same clearances, tolerances, timing etc. These small but many variables can likely be the culprit along with a missed shift or accidental over rev. This is the reason I would choose a smaller cam in the ls3, UNLESS the installer is going to degree the cam along with check the piston to valve clearance. I think too many times people have changed valve springs and slide a big bumpstick in and called it a day without knowing the true ptv clearance. Just sayin....