Calculate Dynamic Compression Ratio

Number of cylinders:
Bore size:	inch
Stroke:	inch
Combustion chamber volume:	cc
Piston to deck height:	inch
Gasket thickness:	inch
Gasket bore diameter:	inch
Dome/Dish or Valve relief:	cc
Piston ring height:	inch
Piston crown diameter:	inch
Con-rod length:	inch
Camshaft intake duration:	degrees
Cam lobe separtion angle:	degrees
Intake Valve closing angle:	degress
Advance or retard:	degress

Cubic Inches:
Litres:
Static Compression Ratio:
Dynamic Compression Ratio:

Chev				Ford				Holden
CI	Bore	Stroke		CI	Bore	Stroke		CI	Bore	Stroke
327	4.000	3.250		250	3.680	3.910		186	3.625	3.000
350	4.000	3.480		289	4.000	2.870		202	3.625	3.250
383	4.000	3.750		302	4.000	3.000		3.8L	3.800	3.400
400	4.125	3.750		347	4.000	3.400		253	3.625	3.0625
427	4.250	3.766		351	4.000	3.500		304	4.000	3.025
454	4.250	4.000		377	4.000	3.700		308	4.000	3.0625
								355	4.000	3.480
								383	4.000	3.750

Crow Cams Hydraulic Grinds
Crow Grind Number	Intake Duration &.050"	Exhaust Duration &.050"	Intake Duration	Exhaust Duration	Intake Lobe Lift	Exhaust Lobe Lift	Lobe Seperation
613	194	202	254	264	.264"	.272"	112
666	204	214	270	280	.280"	.296"	112
602	208	208	270	270	.280"	.280"	110
603	214	214	280	280	.295"	.295"	110
665	214	224	280	290	.293"	.310"	112
770	214	226	280	290	.293"	.297"	111
651	222	222	282	282	.298"	.297"	113
686	224	224	280	280	.290"	.290"	108
619	226	232	286	290	.306"	.316"	109
622	230	230	280	280	.320"	.320"	110
650	230	230	292	292	.302"	.302"	113
761	230	230	292	292	.301"	.299"	109
620	234	234	290	290	.316"	.316"	110
649	234	244	282	295	.303"	.304"	108
690	238	243	295	305	.318"	.318"	108
616	240	240	300	300	.299"	.299"	110
802	245	245	295	295	.338"	.338"	108
675	258	258	310	310	.326"	.326"	108