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Old 02-15-2011, 04:23 PM
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Piston HELP

alright guys.. so im ready to make my order today.. however heres the bad news.. i called larrys engine and marine which he is the best in az on race motors to tell him my setup and see what he thought..
bad news was the piston i wanted to run was a 22cc dome from speed pro.. and im running a big solid roller. he said he just did a build not to long ago with my same setup (really close) and speed pro builds their pistons with the valve pockets in the wrong spot so there will be no clearance. he had to cut the pistons and it was a pain.. now my biggest problem is that my 454 is brand new with a bore of .20 over dont ask why the guy did that i bought it like that. speed pro is the only company i can find who sells 20 over pistons. anyway he saying i need to go with a kb or srp forged which is way more money and i would have to get the new block honed to 30 over.. this is killing my budget any ideas or know if speed pro has fixed this issue.. of what my best budget route would be
thanks.

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Old 02-15-2011, 04:37 PM
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What was the Speed-Pro piston number??
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Old 02-15-2011, 05:09 PM
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693cp20 thanks for any info u can give me
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Old 02-15-2011, 05:18 PM
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Speed Pro hypers are for street engines and have nominal depth valve reliefs. Its not an issue of location. Just guessing: a cam with more than 240 at .050 and .600" lift would be a tight fit. I would mock up your assembly and try a few cams and see what fits.
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Old 02-15-2011, 05:45 PM
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If all the block would need is a bore job to be able to get cheaper pistons easier and have a better selection,why not get it bored .030 or .040 over? Boring is not that expensive,not around here anyway.About $200.00.
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