Whats the largest cam you guys have run in your 5.3 with stock rockers and pushrods. I just installed comps 54-426-11 @ 0.566 in & 0.568 ex. had crane rollers to noisy swithed back to stocks and I can tell it dosnt rev up as free. need none adj. full rollers.

 

What ratio rocker arms were they?

 

They were LS1 / LS6 Gold race cranes 1.7 with 7.250 pushrods they came as a kit.

 

Your pushrods were way to short. That's where the noise came from.

 

Look in sig for cam size. I had my heads milled .022 and ended up using a 7.250 push rod with the stock rockers. The LS7 lifters I have, the lifter/push rod cup is higher up inside the lifter. This also made me fun such a short push rod.

James

 

Sounds like maybe the adjustment wasnt right, or the rockers might have been hitting something. I don't see how they could be thay noisy, crane makes a good rocker.

 

What is the base circle of the cam?
I agree pushrods are to short.
It makes sense cause that would also make your cam seem smaller which would normally cause it to rev alittle quicker.

 

I order a pushrod length tool last night Ill measure and get the right length.