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Old 12-30-2012, 09:46 AM
cdminter59 cdminter59 is offline
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406 small block review

Your stactic compression did not change but your DCR did. Sorry about the math mistake. Anyway .275 above the block is something to consider real hard. Personally I wouldn't build an engine with the piston that much above the block for the street. That is some close tolerances measure carefully. I might have considered it at .005 but not at .275. What happens if your block has been milled in the past? I think the best solution would be to use the 22.5 dished pistons with 5.7 rods. This assembly would give you 9.497 static compression and a DCR of 7.689. But you will still have to deal with the quench of .053". I can suggest something but you will have to contact Cometic Gasket INC. They will make you a custom head gasket with the compressed thickness and bore size you need. I would rather check on this and try to get closer to .040 for quench. But who knows you could use the .027 compressed thickness gasket and not have any problems. I remember back in the day just using the head gaskets from the gasket kit with a .039 compressed thickness with flat top pistons and 76cc heads with a DCR of .064" and never heard any pinging.

Last edited by cdminter59; 12-30-2012 at 09:56 AM.
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