Quote Originally Posted by speedy55779
headcc + piston dishcc + head gasketcc + deck hieghtcc + cylinder sweptcc

(76cc + 15cc + 4.24cc + 3.09cc + 738.26cc) / (76cc + 15cc + 4.24cc + 3.09cc) 836.59cc / 98.33 = 8.5 :1 for 76cc with 4.060 bore and 3.48 stroke with 15cc dished pistons

to get cylinder swept volume (bore size divide it by 2) take your answer x bore size x stroke x 51.48 = cylinder swept volume in cc's
CR = SWEPT VOL. + TDC. VOL. DIVIDE BY TDC VOL.

SWEPT VOL.= 3.1416 X BORE X BORE X STROKE DIVIDE BY 4.

TDC VOL. = CYL. HEAD VOL. + GASKET VOL. + DECK VOL. + PISTON DISH OR DOME VOL.

GASKET VOL. =3.1416 X GASKET BORE X GASKET BORE X COMPRESSED GASKET THICKNESS DIVIDE BY 4.

DECK VOL. = 3.1416 X BORE X BORE X DECK CLEARANCE DIVIDE BY 4.