The Power Squeeze

Maximizing the compression ratio delivers more bang for the buck than you may imagine.

By David Vizard 

At least 150hp of a Pro Stock engine is due to the use of ultra high compression ratios (CR) of 16:1--or more. 110 octane race fuels make this possible, but don't be fooled into thinking that the use of 93 octane pump fuel in any way diminishes the importance of the CR used. Understanding how the CR affects your street or race engine can easily net as much as a 50hp benefit. CONTINUE

Crank It! The Tuning Secrets Of Cranking Compression  By Jeff Smith Photography: Jeff Smith

 

Cylinder Pressure Compression Ratio