Reaching supercar revs is a complicated casserole of ingredients that includes the reciprocating mass, balance, lubrication, type of valvetrain, valve timing, and the engine's ability to breathe.

Correctly viewed, a pushrod engine's valvetrain assembly stands at the gateway of improved power. It is not a collection of components only intended to time and provide the correct valve motion.

From Street Stock to Winston Cup, the three most important areas for engine performance improvements are cylinder heads, valvetrains, and intake manifolds. In particular, cylinder heads affect most ...

The Volkswagen VR6 engine has been used in the VW Golf GTI, Passat, Phaeton, Touareg, Beetle, and many of the golf generations, among others. The VR6 engine is a bit of combination of a "V" style ...