is anybody running stock pushrods with an aftermarket cam? i think i have decided on this cam and was wondering if i could get away with using the stock push rods and valve springs? are the valve springs a known weak point for the 5.3's?
is anybody running stock pushrods with an aftermarket cam? i think i have decided on this cam and was wondering if i could get away with using the stock push rods and valve springs? are the valve springs a known weak point for the 5.3's?
Last edited by mudseeker; 01-11-2009 at 11:15 PM. Reason: spelling
im running stock rods with my z06 cam.
how big of a cam u going?
We need to know the base circle diameter of the cam before we can answer your question.
206/212 .515/.522 112lsa
i'm still debating about going a little bigger though.
212/218 .522/.529 114lsa
from the stock cam or the one i plan on using? i plan on pulling the cam by weds.Originally Posted by Madd Maxx
yea i ran the 212/218 with stock pushrods and springs shifting at 6400rpm
so yea the pushrods will work,but ide do springs
if you plan on reving the engine to high RPMs don't risk making future problems by running the weak stock pushrods. For right around $100 you'll have insurance to keep you from damaging the engine when a weak factory rod bends on a high RPM run.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
The Comp cam. We know the diameter of your stock cam (39.4mm). LS-series engines are good for about 0.5" valve lift for the cam to fit through the cam journals. Any higher lift and the base circle needs to be smaller for it to fit. If the base circle is not too much smaller (like the Z06 cams), you can get away with the stock pushrods w/o losing too much lifter preload.
thanks guys! i'll call comp cams before i place my order and go from there.
Posting Permissions
Reply With Quote