Which valve gets closer to the piston?
#1
Which valve gets closer to the piston?
I might be going from a 230/232 111+1 to a 230/236 112+ 2 since the cam has to come out. I really doubt I'll gain anything, but my heads are milled .015 and I don't want to get close to slapping a piston. Since the intake duration will stay the same but the exhaust gets slightly larger, I wanted to make sure that generally the exhaust valve isn't a worry when it comes to P to V clearance. Is this true at all?
#4
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My exhuast valve was hitting first. With this new cam I am putting in there now. The exhuast duration is 242 with .50" milled heads. I had to flycut .170". Thats hella deep.
Always check to be for sure it will clear. You should have .100" to be safe.
Always check to be for sure it will clear. You should have .100" to be safe.
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#8
Originally Posted by GuitsBoy
I too have heard that it's teh exhaust thats in the most danger. But flycutting a stock piston .170 is pretty ballsy. How thick are the piston crowns?
Yes if you miss a shift at HIGH rpm the piston is racing up the cylinder faster then the exhaust spring is closing the valve....