This paper describes a variable-throat combustion chamber developed by I.F.P. and the Société d'Etude des Machines Thermiques. The chamber seems to offer advantages in overall efficiency with a ...

Automotive performance pistons are manufactured in flat-top, dome or dish configurations—but such a variety in crown design doesn't suggest that engine builders will always have a choice. "Piston ...

Aside from a large camshaft, cubic inches, and lots of fuel, compression is the element that allows power to be formed. It’s the massive amount of squeeze being placed on the fuel and air, which in ...

Rotary engines have an aura of cool. In games of Top Trumps, the V12 might have been king, but a rotary was a joker, a wild card. A lack of mainstream success no doubt contributes; there are reasons ...