Danny Garrison
Member
Can I get away with using stock valve springs with a 472 lift cam? I'm temporarily going to run a set of 906 heads with this cam. I don't really want to change valve springs, retainers ,seals ect if I don't have to.
Valve Springs
- Thread starter Danny Garrison
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What does Erson recommend?
Danny Garrison
Member
I'm not sure, that cam is 20+ years old 516 heads have bad seats, seals and I have a set of decent 906s
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That's not a lot more lift than a stock magnum cam, and a 2H has nice slow ramps. If the springs are in good shape, I'd try em.
Might be worth your time to pull a few and get them tested for pressure.
And since you don't know if they are strong enough, plan on keeping max revs to a practical maximum, maybe 5000? And ALWAYS check for clearance from retainer to guide/stem seals.
Might be worth your time to pull a few and get them tested for pressure.
And since you don't know if they are strong enough, plan on keeping max revs to a practical maximum, maybe 5000? And ALWAYS check for clearance from retainer to guide/stem seals.
Geoff 2
Well-Known Member
I have found BB heads that have mileage on them often have the two centre exh springs down on pressure. Because of the heat from the exh ports, they will often be noticeably shorter than int springs from loss of tension. You should remove & test.
lewtot184
Well-Known Member
the stock red magnum springs will coil bind around 1.35". i wouldn't run them with that cam but you can check installed height plus the .472 to see where you're at with 1.35" measurement. and, don't believe the 1.38 rocker ratio garbage for stock rockers. they are at 1.5 or very close.
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