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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