piston to valve clearance

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piston to valve clearance

Post  10SHOTS on April 18th 2012, 1:03 pm

how much duration and lift have guys used with a diamond flat top piston and tfs steet head without having a clearance problem? i know theres a lot of varables but just wondering if someone has used something in the 280s with .825 lift are so with no problems. thanks
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Re: piston to valve clearance

Post  dfree383 on April 18th 2012, 1:08 pm

Depends on the depth you specified for the relief and where the cam is installed.
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Re: piston to valve clearance

Post  cool40 on April 18th 2012, 10:00 pm

the only way to know is check it. what ever you do,CHECK IT!
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Re: piston to valve clearance

Post  10SHOTS on April 19th 2012, 5:33 pm

did some homework. cam grinder said cam will be .300 with a 1.73 rocker and advanced a degree more than im going to install it. but to add .025 for insurance so .325 minus the valve drop of .068 = .257 + .100 for psion to valve clearance =.357 minus .040 for head gasket = .317 so a .320 pocket shoud be plenty
.then check it
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Re: piston to valve clearance

Post  IDT-572 on April 19th 2012, 5:58 pm

I would check it at several degrees before and after split over lap in case you ever decide to advance or retard your cam later you will know it will work.
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