Putting the Squeeze on

Putting the Squeeze on

The Importance of Compression Ratios and How to Measure Them:

Gibtec-Pistons-Compression-RatiosSince race pistons in domestic V-8 engines move up and down in excess of 100 times per second, replacing them is a normal part of a racer’s routine. NHRA Top Fuel and Funny car teams replace them after every race pass and every second qualifying pass. Pro Stock teams
replace them after every 40 passes approximately, and weekend warriors replace them every 12 to 18 months, sooner if their engines are nitrous-assisted. Read the complete story as it appeared in Maximum Drive magazine’s 2015 Sept/Oct issue.


  1. Hello. My Name is Jason Schagt. I was wondering how big of bore pistons can you make? I’m gonna be building a big Caterpillar motor for a semi and was wondering if that would be something you could make.
    Jason Schagt
    Shotties Porting Service

    • This depends on the size of the od.


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