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| offyaguts |
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Now that I've made cam choise and I'm aware of P/V clearance issues, what is the best method to check?
I've been told dummy up the engine.... Use model clay on valves... Start the engine.... Can anyone give me any more specifics and what I should and shouldn't do. Cheers
_________________ EL Fairmont Ghia V8 Turbo 303rwkw
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| EDXR8 |
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What I did was clay the top of the pistons, just around the valve reliefs and put a bit of oil on the valves so they dont stick to the clay. Install the heads (on old gaskets preferably so you don't wreck a set of new ones), install the rockers etc then turn the engine over by hand a few times. Take the heads off and then use a sharp blade to cut through the clay through the thinnest point and measure the thickness.
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| greg302 |
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model clay goes on top of piston. i dont think u start the engine, just turn over by hand
_________________ 347, crane cam, Pro topline 180 heads, Edelbrock victor efi intake, 80mm C&L maf, 75mm tb, 30lb injectors and 1/4 horse |
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| offyaguts |
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Thanks guys, sounds like a pretty easy process.
If the piston doesnt go all the way through the clay, then what would be the thinnest bit of clay that you would take it that it wont hit, considering they might expand in hotter temps. Maybe half a millimeter to a millimeter?
_________________ EL Fairmont Ghia V8 Turbo 303rwkw
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| greg302 |
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minimum of .080" on intake and .100" on exhaust thats wat my crane leaflet says
_________________ 347, crane cam, Pro topline 180 heads, Edelbrock victor efi intake, 80mm C&L maf, 75mm tb, 30lb injectors and 1/4 horse |
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| offyaguts |
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Just had a thought, is it wise to check all pistons or is one or two sufficient?
_________________ EL Fairmont Ghia V8 Turbo 303rwkw
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| EDXR8 |
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offyaguts wrote: Just had a thought, is it wise to check all pistons or is one or two sufficient?
One or two would be fine |
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