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QIKLUV
07-30-2007, 04:35 PM
4.185 bore x 4.00 stroke 58cc chamber .062 thick gasket flat top piston.... 13.5 to 1. is this correct??:confused:
388Monte
07-30-2007, 05:39 PM
No you would be at 12.5 to 1 @ .000 deck.
QIKLUV
07-30-2007, 06:08 PM
i have used 4 diff calculators and they all come up with 13.50-13.54.
is there something i am missing in the equation?
it is zero deck.:rolleyes:
NOS-Nelson
07-30-2007, 06:14 PM
Remember that a flat top piston usually has about -6 cc's for the valve reliefs.
Ed-vancedEngines
07-30-2007, 07:29 PM
lol.

At zero deck it better have. lol.

Remember the old Mopar 440 's no valve reliefs in piston. Of course as far down as they were the valve would not get close. Like modern nitrous engines, or some of them are now.

That guess of 6 cc might even be a consertive guess. Good guess though. That and the head gasket diameter will take away from most compression figuring programs.

If you really want to get close go to Diamond Racing Pistons and look at the one that Mike Panetta has for you to use. It is pretty exact.

Ed