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.

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) ...

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 ...