Ducati has announced it will introduce new engine technology that will boost power and torque, improve fuel economy, reduce emissions and won’t affect servicing intervals. Ducati Testastretta engine ...

To celebrate HOT ROD's 75th anniversary, we teamed up with CASTROL GTX to bring you some of the stories that exemplify the core of what HOT ROD is and reflect the brand's influence on America's car ...

Discover how VVTi technology changes engine performance, improves responsiveness, and enhances the driving experience when variable valve timing comes into action. #VVTi #CarPerformance #AutomotiveTec ...

No forced induction around here - check out which engines make the most natural power in 2026 ...

Honda did not invent variable valve timing or variable valve lift. In fact, Cadillac had a driver-operated variable valve timing system in production in 1903, three years before Soichiro Honda was ...

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 ...

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 ...

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 ...

A variety of two-stage, or discrete, variable valve lift (DVVL) and continuously variable valve lift (CVVL) systems have recently been incorporated in production vehicles. Several systems that have ...

An updated Suzuki GSX250R has appeared in Chinese type-approval documents with styling changes, a revised exhaust and a variable valve timing system. Tap for more details.