Quote:

3/8 .080" wall pushrods with 650lb spring pressure will possibly deflect a heck of a lot more than .020" , will look like bananas when you pull em out , @ least shoot for .145" wall if using 3/8th.




I was just using a standard 3/8 pushrod as an example. The ones im using in the new engine are Manton Series 5, 3/8, .145 wall straight pushrods. Thanks for all the responses guys. Just trying to figure out what may be a good number to use as a pushrod deflection number to figure the actual lift at the valve. There are more variables, but this is one that Ive heard many different sides of the story on.

10.53 @ 125mph. 1.37 60 foot. Caltracs and Monoleafs, AFCO shocks.

Heads by INDIO MOTOR MACHINE; IMM.
CP Pistons, PC Carbs.