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red82gt · 12-13-2004, 01:57 AM

Piston to valve clearance almost has nothing to do with max lift. When the cam is at max lift, the piston is down the bore. You should be concerned with duration and the cam timing itself and even moreso, the size of the intake valve. I had GT-40's with 1.84" valves and I was running a Comp XE270HR with .544" lift and stock pistons. I had .130" of clearance on the intake and .145" on the exhaust (in other words, I wasn't close to being in danger).

12-13-2004, 01:57 AM	#11
red82gt Sober voice of Reason Join Date: Nov 1998 Location: Kelowna, B.C., Canada Posts: 1,514	Re: stupid head/cam/intake choices LONG POST Piston to valve clearance almost has nothing to do with max lift. When the cam is at max lift, the piston is down the bore. You should be concerned with duration and the cam timing itself and even moreso, the size of the intake valve. I had GT-40's with 1.84" valves and I was running a Comp XE270HR with .544" lift and stock pistons. I had .130" of clearance on the intake and .145" on the exhaust (in other words, I wasn't close to being in danger). __________________ 393W: AFR 205's, hydraulic roller, TKO600.