Posted By: bobs66440
Valve Spring Seat Pressure -Break-In - 05/02/12 03:05 AM
I'm getting ready to break in my rebuilt 440 with a Summit 6401 .465 .488 /.282 .292 flat tappet cam and Stealth heads with 130lb closed seat pressure (330 lb @ .600) single spring with dampers. They, and Summit tech said that they will be fine for break-in, but I've been reading that 80-100lb would be better. I only want to do this once.
Anyone have experience with this cam & spring combo during break-in? Opinions?
Thanks.
Anyone have experience with this cam & spring combo during break-in? Opinions?
Thanks.