What Was The First Engine To Feature Variable Valve Timing & Why Was It Such A Game Changer?

Variable valve timing has been available in cars for almost half a century, first appearing in the Alfa Romeo Spider as far ...
Hot Rod

Variable Valve Timing For Circle Track Engines

In order to set a stage for what follows, let's first revisit some of the fundamentals involved in how valve timing relates to power output. And to further clarify how "power" is defined in the ...
Car and Driver

Variable Valve Timing Explained: An Appreciation of How Quickly Engines Operate

When it comes to the many variables of combustion inside an engine, engineers measure the timing of key events in degrees of crankshaft rotation, a relative frame of reference that remains constant ...
CNET

Variable valve tech and what it does in your car

When you check out the features of a new car, you’ll probably be bombarded with glowing words about its engine’s “advanced valvetrain technology.” How did this happen? They don’t shower us with ...