You’ve heard the term compression ratio before, but have you ever wondered exactly what it means? Well, it’s time to explain exactly what compression ratio is, and why every carmaker is now ...

Key to Porsche’s six-stroke engine is an eccentric crankshaft mechanism that changes the piston’s stroke, giving each cylinder two top and two bottom dead centers and three stroke lengths.

Images by 4 Piston Racing If you're looking to go full tilt on your next K-series build, 4 Piston Racing's gorgeous billet cylinder head should be at the top of ...

A single acting cylinder (SAC) is a pneumatic actuator that produces force and movement in one direction only, with a spring returning the piston to its original position.

Key to Porsche’s six-stroke engine is an eccentric crankshaft mechanism that changes the piston’s stroke, giving each cylinder two top and two bottom dead centers and three stroke lengths ...

A new opposed-piston diesel engine design yields more power and better efficiency from a smaller displacement, and is coming soon to a tank near you.

Ultran Slide Rodless Cylinders from Bimba Manufacturing Co., Monee Park, Ill. (www.bimba.com), use three rare-earth magnets on the carriage and three matching magnets on the piston to create a ...