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Old 02-03-2013, 09:08 PM
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Landshark928 Landshark928 is offline
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Help with Push Rod Length SBC

Trying to dial in my push rod length.

Using the Comp Cams checker 8.150" gauge centers the wear pattern best, however the wear pattern seems pretty wide. Almost from 1/3 inboard to 1/3 outboard.

Also 8.150" seems rather long to me for a solid roller cam in a SBC.

Dart block zero decked.
Lunati Voodoo solid roller with 1.65 scorpion rockers. .660 adjusted lift .016" lash(60133 cam, I think it's a .9" base circle.)
Lunati solid roller lifters
Airwolf heads with +100 valve

Here are pics of the pattern with a 7.900 and 8.150 push rod. Pattern is more center and smaller with the 8.150. Should I try 8.200 to get it perfect. I was worried it seems too long already.








Also note the cheap Pro Comp 7.900" push rods I have do not match up to the Comp Cams checker. When both are set for 7.900 the Pro Comp is much shorter than the checker. Since it uses gauge length I would have thought it would be a tad longer. Guessing the Chinese crap is like playing the lottery?



Here are the push rods I am thinking of ordering:
COMP Cams Hi-Tech Pushrods 8478-16 - SummitRacing.com

8.100"- 3/8" 0.135 wall
or
8.280"- 3/8" 0.135 wall

So before I order, am I missing something? Seems like my Lunati lifters may be standard flat tappet height and not stock roller lifter height?
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