I'm gonna go back into my motor soon and upgrade a few things. I want to make sure I get the right length pushrods for the preload on my Comp R lifters. Here will be my valvetrain:

Yella Terra 1.7 roller rockers
Comp 227/227 .599/.599 110LSA cam
Comp R lifter
Comp 987 springs
heads milled .030"

Anyone know what length pushrods I will need? Thanks!

 

I'm guessing the the stock 7.400" pushrods will work since your heads are millled 30 thou; should cancel out the small base circle on that big cam. You get shims with the Yella Terra's also, that gives you a little more flexibility.

 

I second the guess. 7.400" sounds good.

 

stock 7.400"

most aftermarket cams have a 0.030" smaller base cyrcle (would need a 0.030" longer pushrod)

heads milled 0.030" would need shorter pushrods

7.400" - 0.030" + 0.030" = 7.400"

 

I guess that is why I had to use the shim w/ the YT rockers...I am milled .015? Does this sound right?