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Getting wrong CI when trying to calculate ls1 engine CI displacement

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Old 12-24-2011, 03:47 AM
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Default Getting wrong CI when trying to calculate ls1 engine CI displacement
I know im stupid lol. So I'm multiplying 3.14x3.90x3.62x8 and I come up with 354. What am I doing wrong? I was thinking people always said the CI of the ls1 was 346 and I'm getting 354. It's driving me nuts lol
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Old 12-24-2011, 05:38 AM
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try this formula...basically does the Pi calculations for you

bore*bore*.7854*stroke*#of cylinders....so

3.898x3.898x.7854x3.622x8=345.790454 cubes.
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Old 12-24-2011, 05:44 AM
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Or use bore X bore X stroke X 6.2832
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Old 12-24-2011, 08:57 AM
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Try this calculator

http://www.empirenet.com/pkelley2/DynamicCR.html
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Old 12-24-2011, 09:51 AM
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its not 3.90

bore 3.898 in (99.0 mm)
stroke 3.62 in (92 mm)

5,665 cc
345.7 cu in
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Old 12-24-2011, 05:17 PM
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its bore/2, squared, then multiply by 3.14, stroke and number of cyls

so 3.898/2 = 1.949^2, x 3.14 x 3.622 x 8
= 345.61

Area of a circle is pi*r^2
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