Figuring displacement?

intimidator said
Bore x Bore x stroke x 3.14 x # cylinders = cubic inch
Click to expand...
No it doesn't. If it did, my stroker would be 1664 cubic inches.

4.07 * 4.07 * 4 * 3.14 * 8 = 1664.4​


As I originally stated, the correct formula uses Radius squared... Radius is equal to Bore divided by 2.

(4.07/2) * (4.07/2) * 4 * 3.14 * 8 = 416.1​


If you use BJR's shortcut...

Bore x bore x stroke x 6.2832=CI​

... the number of cylinders must be 8. The reason is because Bore is equal to Radius times 2. So his formula is really...

(2 * Radius) * (2 * Radius) * Stroke * (2 * Pi) = ci​

And when you simplify that, the 2 * 2 * 2 becomes 8.