i have a pretty pig heads and cam package and i am running 7.150 p/r's and i have what looks to be perfect valve train geometry, now my ? is if i upgrade to te 1.65 rocker will it throw off the geometry?

and whats is thought on the comp pro-magnum HI-TECH SERIES rockers which are s/s bodied they told me this would work alot better in terms of how long they last over the aluminum bodied rockers as both are rebuildable. are do Steel bodided rockers last longer then aluminum bodied rockers? and will they run quieter.

i'm stuck on this one..

 

ttt

 

As far as I know the only difference in the different ratio rockers is the center to center distance between the pushrod cup and the rocker stud pivot. I wouldn't expect it to change the geometry between your rocker arm tip, rocker pivot and valve within the same lift range you are currently running. At max lift theoretically the contact point on the top of the valve would sweep a little further toward the rocker stud.


Michael