PushRod Length??
Thread Starter
Heel & Toe
Joined: Mar 2016
Posts: 15
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PushRod Length??
I recently got the BTR stage 4 cam and ive been talking to Advance inductions about doing my head work and they recommend to bump the compression up to 12:1 now with decking the heads that much would that require me getting shorter pushrods?
Le Mans Master
Joined: Dec 2003
Posts: 5,047
Likes: 252
From: San Diego
Shorter pushrods might not be the case but for sure check the length. The reason I state this is because your new cam will have a smaller base circle than your OEM cam and would require longer pushrods if you were not changing the heads. Regarding your head milling I would consider using a thinner head gaskets verse milling your heads. I'm saying to not mill your heads but to minimize the milling to preserve the quinch.
Le Mans Master
Joined: Dec 2003
Posts: 5,047
Likes: 252
From: San Diego
Once you install you new heads and cam. You will need to find top dead center on the cylinder and make sure it's on the compression stroke. Once you found TDC turn your crank 1/4 pass TDC this will ensure your on the base circle of the cam. Then set zero lash, meaning no play between the rocker and pushrod. Once that is determined add your lifter preload then you will have your pushrod length.
Safety Car
Joined: Jun 2005
Posts: 4,977
Likes: 256
From: St. Louis Missouri
If you're installing the heads, you'll need a pushrod length checker. They are about $20 from summit. If you aren't installing it, then your builder will do the measuring for you and let you know. Odds are, you'll need a shorter pushrod.
Safety Car
Joined: Jun 2005
Posts: 4,977
Likes: 256
From: St. Louis Missouri
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Safety Car
Joined: Jun 2005
Posts: 4,977
Likes: 256
From: St. Louis Missouri
Brandon619 told you how to do it in the post before your last. He left out a couple of parts, but I provided you with a complete step-by-step guide in a link.
Le Mans Master
Joined: Dec 2003
Posts: 5,047
Likes: 252
From: San Diego
Last edited by Brandon619; Aug 15, 2016 at 04:43 PM.