PRI 2010: Speed-Pro Digital Diamond Profiled Pistons

When it comes to running pistons in your engine, sometimes a forged slug is out of the price range.  Even in some claimer classes, an engine needs to be built on a budget as well in fear of loosing it.  Speed-Pro gives you a lot of the advantages of a forged piston in a hypereutectic package.

Some of those advantages include piston and pins that are weight matched to a maximum of +/- two gram variation.  The pistons are made from a 425 aluminum alloy with a proprietary heat treat process, featuring a fully machined bowl and valve reliefs.  The thermal characteristics allow for tighter wall clearances while custom Thermal Arching Compensation ring groove geometries maintains optimal ring face-to-bore alignment for increased power, and reduced oil consumption.

• Standard skirt coating reduces friction while increasing wear resistance
• Fully machined bowl and valve reliefs
• Weight matched to +/- two grams
• Same material found in late-model Camaro and Corvette pistons

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About the author

Mark Gearhart

In 1995 Mark started photographing drag races at his once local track, Bradenton Motorsports Park. He became hooked and shot virtually every series at the track until 2007 until he moved to California and began working as a writer for Power Automedia. He was the founding editor for its first online magazines, and transitioned into the role of editorial director role in 2014. Retiring from the company in 2016, Mark continues to expand his career as a car builder, automotive enthusiast, and freelance journalist to provide featured content and technical expertise.
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