Block deck height
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==Deck heights defined== | ==Deck heights defined== | ||
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An uncut production SBC block deck height is nominally 9.025". When combining a 0.045" piston deck height with a 0.040" compressed gasket, the result is a 0.085" '''[[quench]]''' distance, which will have little effect in controlling detonation. Quench is recommended at no less than 0.035" to 0.045", so a zero piston deck height with 0.040" gasket puts the squish in the right place (0.040"). This isn't the only way a 0.040" quench can be reached, obviously. A better way (and cheaper from the machine shop labor standpoint) is to use a thinner head gasket and keeping the deck as thick as possible. This is easy to do with the 4" nominal bore SBC because of the abundance of '''[[head gasket]]s''' available for that engine. | An uncut production SBC block deck height is nominally 9.025". When combining a 0.045" piston deck height with a 0.040" compressed gasket, the result is a 0.085" '''[[quench]]''' distance, which will have little effect in controlling detonation. Quench is recommended at no less than 0.035" to 0.045", so a zero piston deck height with 0.040" gasket puts the squish in the right place (0.040"). This isn't the only way a 0.040" quench can be reached, obviously. A better way (and cheaper from the machine shop labor standpoint) is to use a thinner head gasket and keeping the deck as thick as possible. This is easy to do with the 4" nominal bore SBC because of the abundance of '''[[head gasket]]s''' available for that engine. | ||
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