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 much boost, and has a significant ...

We show you how to measure displacement and compression ratios to help you push engine compression limits without breaking the rules of your sanctioning bodies - Circle Track Magazine ...

We walk you through a compression test, a great way to determine the condition of your valves and piston rings.

Mods For Mods Part IV - Comparison Ratio On Ford Mustang GT 4.6L Engine Compression Ratio Comparison With Kenne Belle ...

Variable Compression Ratio Engines have been some sort of a Holy Grail, and now Porsche proposes a viable solution for this ...

But too high a ratio causes knocking—premature detonation of fuel-air mixture during the engine's compression stroke caused by high cylinder temperatures.

How to Calculate Compression Ratio from Scratch As an example, let's calculate the CR for a popular big-block Chevy application.