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Old 06-25-2013, 08:39 PM
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SGreve32x, are you planning on this 383 being a pump gas engine? The Skip White kit you've listed with flat top pistons will give a too high static compression ratio to run on pump gas unless you go with 72 or 76cc chambered heads, which will limit your choices in heads. Built with a deck height/head gasket combo that gives a .040" quench your static CR will be 11.25:1, too high for pump gas. With a 72 cc chamber head the static CR will be 10.28:1 (still pretty high but could be ok with a tight quench), with a 76 cc chamber head the static CR will be 9.86:1. Using 64cc heads gives you a much greater choice in heads, but you'll need a dished piston to keep the CR in line if you want to run pump gas. The problem is the Probe dished pistons have a round dish which doesn't give a good quench. It would be MUCH better to have a D dish/reverse dome/step dish type of piston that aren't available in the Probe FPS series included in the Skip White kits.
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