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Power Strokes
6.0 Tech
Camshaft Piston to Valve clearances
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[QUOTE="Zeb, post: 1529190, member: 30304"] 1st off, you’re not driving me nuts. It’s refreshing to see someone paying attention to details. I see too many guys that have no idea what anything measures, assemble the motor and then wonder why they have issues. 2nd, I can’t read that last graph you posted. It’s too blurry on my phone. 3rd, I should have been more clear when I originally posted piston protrusion and valve recession #’s. Those specs are “supposed” to work with a Stage 2 cam, BUT I HAVE NEVER MEASURED/RUN A MOTOR THAT HAS THAT MUCH PISTON PROTRUSION and a Colt Stage 2 cam. Every motor I’ve put a Colt Stage 2 in we’ve set it up with 0.026”, or less, piston protrusion, and 0.025”-0.028” valve recession, used Mahle gaskets (same thickness as Motorcraft) and been fine. If you don’t want to mess with the heads, and you’re taking the bottom end apart again, just take some off the top of the piston to get the clearance you need. My Excursion has 0.009”-0.015” piston protrusion, and delipped pistons. Do the math on what the compression ratio is.....Starts just fine, but does white haze a bit for the first minute or two when it’s below 30* ambient temperature. [/QUOTE]
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Camshaft Piston to Valve clearances
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