If I was to use diamond 4.030 +10cc nitrous domed pistons with factory 317 71cc heads and .040 head gaskets... with a 4.00 stroke crank
My overall compression ratio would be 11.5? is that right? Think i messed up somewhere doing that calculator..
If I was to use diamond 4.030 +10cc nitrous domed pistons with factory 317 71cc heads and .040 head gaskets... with a 4.00 stroke crank
My overall compression ratio would be 11.5? is that right? Think i messed up somewhere doing that calculator..
If the 4.030 is the bore size i came up with 14.49. check this site out.
Engine Size and Compression Calculator
David,
2003 GMC Sierra Denali, LQ4, AWD, AWS, 4.10, Wheatley 93 tune, LT headers, GMPP CAI, BBK 80mm TB, MSD wires, E3 plugs, 160* T-stat, Flowmonster DI/DO, cutouts. Working on 4.8 heads, just purchased Comp 228R cam, 918 Springs, TI retainers, 7.4 hardend pushrods,
I came up with 10.65:1.
Hold on, I have to do it again.
Last edited by MikeGyver; 03-08-2009 at 08:59 PM. Reason: Forgot the +10cc
2000 Sierra 2500 HD. 408 (11-2007) Whipplecharged, Big (18x24x4) FMIC.
I came up with 12.2:1.
2000 Sierra 2500 HD. 408 (11-2007) Whipplecharged, Big (18x24x4) FMIC.
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