Questions about heads and P/V
Questions about heads and P/V I'm not sure how to word this but ill try.
I bought the new PRC LS6 CNC Ported Heads-PRC springs,Hardened Chromoly Pushrods, with a 233/239 cam (233/239.595"/.603") 112Lsa, My question is will I see any p/v loss with this cam, is it too big.
Not sure if this is needed but heres the flow #'s.
Valve Lift Intake
.100" 72
.200" 149
.300" 205
.400" 255
.500" 287
.600" 307
.625" 310
I bought the new PRC LS6 CNC Ported Heads-PRC springs,Hardened Chromoly Pushrods, with a 233/239 cam (233/239.595"/.603") 112Lsa, My question is will I see any p/v loss with this cam, is it too big.
Not sure if this is needed but heres the flow #'s.
Valve Lift Intake
.100" 72
.200" 149
.300" 205
.400" 255
.500" 287
.600" 307
.625" 310
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Joined: Jun 2003
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The flow #'s on the heads have nothing to do with the P/V clearance. The size of the cam and the combustion chamber size on the heads (have they been shaved and how much) is what determan's the clearance. And the duration is the big determaning factor. Most likely the clearance will be fine but you could clay it just to make sure which is always wise when going to a biger cam.
put modeling clay on top of the piston, and carefully roll the motor over. you can see the contact pattern.
i feel buying a magnetic base dial indicator, and a degree wheel is the way to go. you can degree the cam (obviously), and also put check springs on the head and actually measure PtoV...claying it is not as accurate, imo.
i feel buying a magnetic base dial indicator, and a degree wheel is the way to go. you can degree the cam (obviously), and also put check springs on the head and actually measure PtoV...claying it is not as accurate, imo.
Restricted User
Joined: Jun 2003
Posts: 588
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I've only clayed to get P/V clearances. I use the check springs while degreeing the cam but didn't know I could get my P/V clearance out of it as well. How do you get the P/V clearance while degreeing the cam?
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