Since the beginning of hot rodding, gearheads have endeavored to increase the performance of internal combustion engines through the optimization of valve timing. It's been proven time after time that ...

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 ...

GM Powertrain announced today it will deliver a 3.6-liter V-6 gasoline engine with direct injection and variable valve timing (VVT) technologies in the 2008 model year. A vehicle application will be ...

Earlier this year Toyota launched the iQ micro-car in Europe and now the Japanese automaker has unveiled a more “performance-oriented” version of the cute and trendy iQ. The new engine is a 99hp VVT-i ...

Toyota’s incredible iQ, the world’s smallest four-seat car, gains a new engine option with the addition of a 1.33-litre Dual VVT-i petrol unit with Toyota Optimal Drive technology. Presented for the ...

Toyota has added an all-new 1.33-litre Dual VVT-i petrol engine with stop-start technology to the Toyota Auris. Toyota says that the new powertrain with stop-start results in 17% lower CO2 emissions ...