The 1970 4-4-2 equipped with the W-30 455 was an epic muscle car but it could've been even better with the 32-Valve W-43 455 ...

Truck owners choose the 5.9 Cummins engine because it combines outstanding power features with exceptional durability.

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 ...

The Knight sleeve valve engine used the four-stroke Otto-cycle system present in most modern vehicle engines. Starting with ...

The positive crankcase ventilation valve releases exhaust gas and unburned fuel from the engine block into the intake manifold. All engines allow some exhaust gases, unburned fuel and oil to ...

While the poppet valves work well at low speeds, they are unreliable at high engine speeds, and the “timing,” or opening and closing of the valves, is uncertain. This is the gravest objection ...

Since few of us drive around with the throttle wide open—lest we draw unwanted attention—the engine is forced to draw air through a partially closed butterfly valve that creates a vacuum in ...