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What Is Variable Valve Timing, And How Does It Work?

There is so much going on with internal combustion engines (ICEs) these days, it can give you a headache just reading about them. That's why we do the research for you and then cram it into bite-size ...
Hot Rod

How to Delete Chevrolet Variable Valve Timing (VVT)

The VVT system operates by advancing and retarding the cam timing to suit the speed and load of the engine. Generally speaking, advancing the cam (from 0) tends to improve low-speed power, while ...
GM Authority

GM Completes Rollout Of Variable Valve Timing In Its Truck Small Block V-8

GM has announced that all V-8 powered Chevrolet and GMC trucks now feature variable valve timing (VVT) for the 2010 model year. A quick trip back to engineering 101 reminds us that VVT is a piston ...
Hot Rod

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 ...
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 ...