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Old March 22nd, 2006, 01:10 PM   #1
GreaseMonkey
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Engine B/S and R/S Ratios

Measurements in inches. PS = Piston Speed (in inches)
I don't know why the spacing won't format into the post, so I did a color code instead.

CID Bore Stroke B/S Ratio Rod Length R/S Ratio Rod Angle PS @ 6000 RPM
Chevy
302 4.000 3.000 1.333 5.700 1.900 15.258 3000
302 4.000 3.000 1.333 6.000 2.000 14.495 3000
305 3.736 3.480 1.073 5.700 1.638 17.699 3480
327 4.000 3.250 1.230 5.700 1.754 16.529 3250
327 4.000 3.250 1.230 6.000 1.846 15.703 3250
334 3.766 3.750 1.000 5.565 1.484 19.535 3750
350 4.000 3.480 1.149 5.700 1.638 17.699 3480
350 4.000 3.480 1.149 6.000 1.724 16.814 3480
366 4.000 3.600 1.111 5.700 1.583 18.310 3600
366 4.000 3.600 1.111 6.000 1.666 17.394 3600
377 4.125 3.480 1.185 5.700 1.638 17.699 3480
377 4.125 3.480 1.185 6.000 1.724 16.814 3480
383 4.000 3.750 1.066 5.565 1.484 19.535 3750
383 4.000 3.750 1.066 5.700 1.52 19.073 3750
383 4.000 3.750 1.066 6.000 1.6 18.119 3750
400 4.125 3.750 1.100 5.565 1.484 19.535 3750
400 4.125 3.750 1.1 5.700 1.520 19.073 3750
409 4.310 3.500 1.231 6.135 1.753 16.539 3500
410 4.125 3.810 1.082 6.000 1.575 18.409 3810
427 4.250 3.760 1.130 6.135 1.632 17.768 3760
454 4.250 4.000 1.062 6.135 1.534 18.902 4000

Ford
302 4.00 3.00 1.333 5.090 1.697 17.087 3000
351 4.000 3.500 1.143 5.780 1.651 17.555 3500
427 4.230 3.780 1.119 6.485 1.716 16.898 3780
428 4.130 3.980 1.038 6.485 1.629 17.792 3980
429 4.360 3.590 1.214 6.605 1.840 15.757 3590
460 4.360 3.850 1.132 6.605 1.715 16.898 3850

Chrysler
318 3.910 3.313 1.180 6.123 1.848 15.686 3313
360 4.000 3.580 1.117 6.123 1.710 16.950 3580
383 4.250 3.380 1.257 6.359 1.881 15.409 3380
400 4.340 3.380 1.284 6.359 1.881 15.409 3380
413 4.188 3.750 1.117 6.770 1.805 16.058 3750
426 4.250 3.750 1.133 6.770 1.805 16.058 3750
426 4.250 3.750 1.133 6.860 1.829 15.847 3750
440 4.320 3.750 1.152 6.770 1.805 16.058 3750

Olds
330 3.938 3.385 1.163 6.002 1.773 16.350 3385
350 4.057 3.385 1.198 6.002 1.773 16.350 3385
400 4.001 3.975 1.006 7.000 1.761 16.462 3975
400 3.870 4.250 0.910 6.735 1.585 18.294 4250
403 4.351 3.385 1.285 6.002 1.773 16.350 3385
425 4.125 3.975 1.037 7.000 1.761 16.462 3975
455 4.126 4.250 0.971 6.735 1.585 18.294 4250

Pontiac
326 3.791 3.750 1.011 6.625 1.767 16.410 3750
350 3.877 3.754 1.033 6.625 1.765 16.427 3754
389 4.062 3.750 1.083 6.625 1.767 16.410 3750
400 4.125 3.750 1.1 6.625 1.767 16.410 3750
421 4.093 4.000 1.023 6.625 1.656 17.504 4000
428 4.125 4.000 1.031 6.625 1.656 17.504 4000
455 4.153 4.214 0.985 6.625 1.572 18.440 4214

Buick
350 3.800 3.850 0.987 6.387 1.659 17.475 3850
403 4.351 3.385 1.285 6.002 1.773 16.350 3385
425 4.313 3.640 1.185 6.220 1.709 16.966 3640
430 4.185 3.900 1.073 6.607 1.694 17.113 3900
455 4.313 3.900 1.106 6.607 1.694 17.113 3900
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Last edited by GreaseMonkey; March 22nd, 2006 at 05:34 PM.
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