[AT] OT: Calculating Cubic Inches

[Bob McNitt]

Formula to Calculate the CID (Cubic Inch Displacement) of an engine:

R² × Pi × H × number of cylinders = CID (Cubic Inch Displacement)

In other words;

Radius of the bore squared × 3.14 × Stroke × number of cylinders = CID

For Example:

If we have a V8 engine with a 4" bore and a 3" stroke, the formula
would read:

2² × 3.14 × 3" × 8 = 301.44 CID

Hope this helps.