pushrod question.....
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
I sorta almost agree. Stock heads, rockers won't change the wipe pattern as it came from the factory. However, a larger lift cam will change it because the rocker has to rotate through a larger angle. So the wipe should be checked with any aftermarket cam prior to measuring for pushrods. Pushrods should be the last part ordered for any installation. I kind of wish the vendors would include an adjustable pushrod with their kits and then ship the pushrods separately once the owner has measured.
On OEM heads preload is changed via p-rod length
so in cam only, rockers are unchanged, rocker position is unchanged, rockers are NON adjustable, valves are same height as OEM (still original valves), so wipe patter is unchanged.
Remember OEM rockers are not using a bearing on the fulcrum and are not adjustable. Wipe pattern of stock rockers is wide.
Last edited by PREDATOR-Z; Apr 13, 2009 at 09:50 AM.
Wipe pattern will not change on LS stock rockers unless you change valves (valve height), or rockers are changed.
On OEM heads preload is changed via p-rod length
so in cam only, rockers are unchanged, rocker position is unchanged, rockers are NON adjustable, valves are same height as OEM (still original valves), so wipe patter is unchanged.
Remember OEM rockers are not using a bearing on the fulcrum and are not adjustable. Wipe pattern of stock rockers is wide.
On OEM heads preload is changed via p-rod length
so in cam only, rockers are unchanged, rocker position is unchanged, rockers are NON adjustable, valves are same height as OEM (still original valves), so wipe patter is unchanged.
Remember OEM rockers are not using a bearing on the fulcrum and are not adjustable. Wipe pattern of stock rockers is wide.
