Calculate Dynamic Compression Ratio

Chev

CI Bore Stroke
327 4.00 3.250
350 4.00 3.480
383 4.00 3.750
400 4.125 3.750
427 4.250 3.766
454 4.250 4.000

Holden

CI Bore Stroke
186 3.625 3.000
202 3.625 3.250
3.8L 3.800 3.400
253 3.625 3.0625
304 4.00 3.025
308 4.00 3.0625
355 4.00 3.480

Ford

CI Bore Stroke
250 3.680 3.910
289 4.00 2.870
302 4.00 3.000
347 4.00 3.400
351 4.00 3.500
377 4.00 3.700

Crow Cams Hydraulic Grinds

Crow Grind
Number		 Intake
Dur @.050"		 Exhaust
Dur @.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
Nnumber 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: