317 heads that I just got have .030 longer exhaust valves
06-10-2010, 07:58 PM
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317 heads that I just got have .030 longer exhaust valves can any body help with some info about why the valves on the exhaust would be .030 longer than the intake valves I posted all of the specs the heads were ported and larger valves installed but with the fact that the exhaust valves are longer wont that be a problem with the valve adjustment ?? if I put these heads on and just run the rockers down what happens at high rpm when the lifters pump all the up wont they hit the piston
ALSO THESE HEADS WERE BEING BUILT FOR A SUPERCHARGER FROM WHAT I WAS TOLD
specs on heads
flow #
intake 0.6000 lift 273.6 ccfm after that it goes down
exhaust 0.7000 lift 220.2 ccfm after that it goes down
69.8 cc combustion chamber
valves
intake 202
ehaust 1.575
any info that might help would be good
ALSO THESE HEADS WERE BEING BUILT FOR A SUPERCHARGER FROM WHAT I WAS TOLD
specs on heads
flow #
intake 0.6000 lift 273.6 ccfm after that it goes down
exhaust 0.7000 lift 220.2 ccfm after that it goes down
69.8 cc combustion chamber
valves
intake 202
ehaust 1.575
any info that might help would be good
06-10-2010, 09:21 PM
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Did you contact the person that built the head to see if they were put there on purpose? I know the 317's have a different valve angle but I have noe idea on the lengths, contact one of the head makers like AFR or patriot etc. and see what they have to say on the lengths. Thats my $.02.
