Hosted on MSN

The difference between variable valve timing (VVT) and variable valve lift (VVL), plus how they work

Variable valve timing (VVT) and variable valve lift (VVL) have very similar names, both referring to variable valve performance. Does that mean that they are basically the same thing? The are most ...
SlashGear

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

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 existed, ...
Hot Rod

Variable Valve Timing - The Next Phase

Once upon a time, picking a cam for a given engine combo was all about compromise: improve top-end power at the expense of low-end torque, run well at wide-open throttle but sacrifice idle stability ...
Motor Trend

The Advantages of Using a VVT Cam in a Gen IV and Gen V Engine

Decades ago (OK, half a century or more), there was a product advertised in many of the performance magazines called the Varicam. The idea was a set of springs attached to a centrifugal device that ...
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 ...