Valve Springs

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Valve Springs

Post  geno on September 19th 2013, 1:29 am

If you move down in cam size, do you have to go down with the springs also? I have an 801 lift and want to install a 765. Would the springs be too much for the new cam?

Thanks,
Geno
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Re: Valve Springs

Post  dfree383 on September 19th 2013, 2:16 am

What springs and installed height are you running now?

Most of the time it won't be a big deal, but there are exceptions.
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Re: Valve Springs

Post  geno on September 19th 2013, 11:32 am

The springs that were installed were Comp Cams 944-16. Seat load: 190 lbs @ 1.950 - open 747 lbs. @ 1.200' - spring rate : 743 inch lbs. - coil bind is 1.100. Hope this helps.

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Re: Valve Springs

Post  dfree383 on September 19th 2013, 11:50 am

Those are good springs. if you installed them at 1.950 you are still pretty good shape, the .800 - lash put you at about .075 from coil bind the .765 cam is still relatively tight to that at .115, not ideal but it should work fine. you could slide a little bit of shim under the springs to get it a bit tighter.
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Re: Valve Springs

Post  geno on September 19th 2013, 1:53 pm

Thank you dtree. I'll slip a shim in before I install the heads. Once again, Thanks

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Re: Valve Springs

Post  IDT-572 on September 19th 2013, 4:01 pm

Over the nose pressure is just as important as your seat pressure..............
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