If the 4.030 is the bore size i came up with 14.49. check this site out.
Engine Size and Compression 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,
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