Pushrod length
Thread Starter
Advanced
Joined: Jul 2018
Posts: 76
Likes: 5
From: Southeast Mo.
Pushrod length
I know this has been discussed to death but I'm doing a H/C/I swap in a few weeks, using .051 compressed gasket and .035 milled heads. The new cam's base circle is .002 smaller than the stock one. Can I get the right length if I subtract the .035 mill from the 7.385 stock length pushrod, getting 7.350 length and it be the correct size?
Burning Brakes
Joined: Dec 2017
Posts: 755
Likes: 272
Assuming you are using the stock lifters (LS7) and stock rockers, yes, that will probably get you close enough.
No engine expert will tell you to trust the math in itself. You SHOULD buy an adjustable push-rod and measure to make sure the 7.350 is the correct length. But going to that depth is your call.
Who are you buying the heads from? Often times the builder can tell you what you need if it is a "typical" setup. My heads are PRC units from Texas Speed and they were able to tell me exactly what length push rods I needed based on my selections for milling, head gasket thickness, etc.
No engine expert will tell you to trust the math in itself. You SHOULD buy an adjustable push-rod and measure to make sure the 7.350 is the correct length. But going to that depth is your call.
Who are you buying the heads from? Often times the builder can tell you what you need if it is a "typical" setup. My heads are PRC units from Texas Speed and they were able to tell me exactly what length push rods I needed based on my selections for milling, head gasket thickness, etc.
Thread Starter
Advanced
Joined: Jul 2018
Posts: 76
Likes: 5
From: Southeast Mo.
My heads are ported 241 milled .035 with new .051 gaskets, new ls6 lifters, factory rockers with the trunion upgrade. I should use the length checkers but I was thinking if the only difference in the setup is the .035 head mill that I could put in a .035 shorter pushrod.
