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Old 06-20-2003, 11:46 PM
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Talking How Do You Figure Out How Many Cubic Inches A Motor Will Have.

I HAVE A 350 CHEVY MOTOR AND WAS PLANNING ON PUTTING A 327 STEEL CRANK IN IT AND WAS WONDERING, DESTROKING ONE LIKE THIS WHAT OR HOW DO I FIGURE OUT WHAT SIZE IT WILL BE.

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Old 06-21-2003, 12:30 AM
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it would be a 327. the 302, 327 and 350 share a 4 inch bore. only the stroke differs. if you want to add up cubic inches, here`s how you do so
bore X bore X 0.7854 X stroke X numbers of cylinders =
example 4.001 X 4.001 X 0.7854 X 3.480 X 8 = 350
also be aware, the 62 - 67 327 crank was a small journal, 68-69 was a large journal, if your crank is a small journal you`ll need bearing spacers to install the crank in a large journal 350 and small journal rods with the correct 327 pistons. one more thing, loose the caps lock.
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Old 06-21-2003, 04:10 PM
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Here are a bunch of different calculators:

http://www.kb-silvolite.com/calc.phtml
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Old 06-21-2003, 07:35 PM
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Fomula for CI

The formula is pi x (bore/2) squared x stroke. The bore is a circle and area of a circle is pi x r squared.

Example: figuring out the cubic inches on the new 5.7 Hemi, you take 3.92/2 = 1.96; 1.962 squared is (3.8416) x pi= 12.0687 x 3.58 stroke =43.20 x 8 cylinders = 345.6.

Hope this helps.
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