Mat

Hey guys,

Just a quick one here. Anyone got a calculator for pushrod length?

Perhaps someone can just answer my question straight up. I'm going to be installing a cam with specs of:

224/228 .581/.588 on a 113

Now.. do I use stock length 7.4" pushrods or do I go longer/shorter? Usually in the old motors I've put together you go with a shorter rod since the lift has increased in order to maintain proper valvetrain geometry...

Is my PVC gonna be okay? (no work done to heads at all/stock gaskets etc.)

Any advice?

BLUE99T/A

iTrader: (2)

I'm pretty sure cam base circle and rockers will determine p/r length. Someone correct me if I'm wrong.

davered00ss

iTrader: (4)

Cam base circle determines pushrod length along with Your heads.(if they have been milled) 7.4 is for an aftermarker cam and stock or unmilled ls1 heads.

PREDATOR-Z

I would use 7.425 Comp Cam p-rods. Available at Thunder Racing
While 7.40's will work, you valvetrain will be noticeably noisier.
7.425's quiet things down a lot and get you closer to original preload on lifters.

Mat

Gotcha. Right on. Is that because as was mentioned the base circle change necessitates this? I always used to associate extra lift needing a shorter rod. I'm betting I was wrong!