351M valve spring question.
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Elder User
Joined: Dec 2010
Posts: 600
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From: New Carlisle, Ohio
351M valve spring question.
So I'm looking at this cam for my '77
JEGS Performance Products 200050 JEGS Performance Hydraulic Flat Tappet Camshafts=
I know that stock springs generally on these engines are set up for .490 lift. Now here's my question. If I stuck with stock springs the cam calls for .030 and .060 rocker shims for correct lash clearance. Would that give enough clearance on the spring? Or will I still need to swap springs. I'm brain farting right now. Also the lift of the new cam is .484/.510.
JEGS Performance Products 200050 JEGS Performance Hydraulic Flat Tappet Camshafts=
I know that stock springs generally on these engines are set up for .490 lift. Now here's my question. If I stuck with stock springs the cam calls for .030 and .060 rocker shims for correct lash clearance. Would that give enough clearance on the spring? Or will I still need to swap springs. I'm brain farting right now. Also the lift of the new cam is .484/.510.
Elder User
Joined: Apr 2003
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stock springs are not that great, especially old ones with a new cam. Spend the extra dough and do it right, with new matched springs compatible with the cam.
Believe me, you do not want broken springs, or valve float!
Believe me, you do not want broken springs, or valve float!
Thread Starter
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Elder User
Joined: Dec 2010
Posts: 600
Likes: 1
From: New Carlisle, Ohio
Oh I was deffinatly going to replace them, I was curious about the stock spring as I would like to use them with the cam for break in then swap in new. Now I've heard that you can run a big block chevy single spring on these engines. Any truth to that?
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