Here's the process of making this rotary valve engine with a different intake and an exhaust system. It wasn't easy to start ...

This means it is a reciprocating rotary engine. Yeah, weird stuff. The camshaft is also centrally located in the crankcase and still runs at 50-percent crankshaft speed but only actuates one valve ...

Jacobs Vehicle Systems, a manufacturer of heavy-duty diesel engine retarding systems and valve actuation mechanisms, has launched a new 2-Step Variable Valve Actuation (VVA) system.By enhancing ...

The first production car engine with variable valve timing (VVT) came from Alfa Romeo in 1980. It was installed in the fuel-injected Alfa Romeo Spider. Before this, a few experimental systems ...

We test GM's new variable valve timing system and get dozens of horsepower with not sacrificing and torque. Only at www.hotrod.com, the official website for Hot Rod Magazine.