Four-stroke engines, which make up 99% of vehicles on the road, rely on a system for managing air intake, compression, ...

Compression: An automotive term used by everybody, forever. Let's get into some detail and maybe develop a better understanding. Pressure, and more pressure: It's a must-have to produce power within ...

With every passing day the Mule provides opportunities beyond our original expectations. Since the 467ci engine belongs to HPP editor Tom DeMauro, it is at our beck and call. This affords HPP the ...

Rotary engines (also known as Wankel engines and Wankel rotary engines) are quite different from piston or "reciprocating" engines. One of the distinguishing features is that they don't need valves to ...

Automobiles were still in their relative infancy in 1905, but they had been growing more popular for years. There was a problem, though: they were extremely noisy. One cause of the noise were the ...

The 5-valve engine—a short but intense era born from 5 valves per cylinderWhen looking at car or motorcycle engines, the term ...