Compression Ratio = (626.8cc + 63.5cc) / 63.5cc Compression Ratio = 10.9:1 Run your numbers twice or three times to make sure you've not making any errors—but don't worry.

The compression ratio isn’t just a number: it’s one of the greatest determining factors in engine building. Compression ratio determines the type of fuel, how m MotorTrend ...

How to Calculate Compression Ratio from Scratch. As an example, let’s calculate the CR for a popular big-block Chevy application. Starting with a 0.060-inch overbore (4.310-inch) ...