Marine 273 build

TRBenj said

65Dart, I did read that thread you linked a while back and will be forwarding it along to my buddy who already has his Egges in hand. I have a hard time seeing how going from 675 heads and factory flat tops to 315's and domed pistons wouldnt make it a piece of cake to gain a point of compression, but I suppose the math is what it is! Im sure some milling is in his future, as he was planning to have the 315's ported anyways.

For my build, Im keeping the factory flat tops and trying to break into the low-mid 9's for CR, if at all possible.

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If your buddy is willing to repeat my measurement of the compression height for the Egge pistons and post it here, it would be greatly appreciated. I'd like some confirmation that I did it right and that they don't vary from batch to batch.

Factory flat tops might be taller than currently available flat tops. If your engine is apart, maybe you can let us know how far below zero deck they are. Or if they're out of the bores perhaps you could measure the compression height directly.

EDIT: Just noticed your earlier post where you state that your pistons are .012" below deck. That's really good and that's where I keep having trouble on my build. My block deck is .010" above spec at 9.610". Even if I mill off .010" to get the deck height on spec, those Egge's will still be .072" in the hole. I would love to know your deck height and/or your piston compression height.