Discover how VVTi technology changes engine performance, improves responsiveness, and enhances the driving experience when ...

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 ...

Much has been made of Honda's B- and D-Series VTEC engines over the years, but what are the key differences between the two ...

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 ...

New evidence just surfaced indicating that the GSX250R is slated for some significant upgrades in engine performance and ...

Set to debut in a new 1.6-liter 4-cylinder Smartstream turbo engine, Hyundai's new valve tech is able to continuously change the duration of valve openings to suit driving conditions, which Hyundai ...

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 ...

Something I've been kicking around for a while, and wanted to get opinions on: Is there a reason we can't use variable intake valve timing to "optimize" engine operation for E85 operation, while still ...

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 ...

Hyundai figured out continuously variable valve duration in a production vehicle (or at least one about to hit production). increase in performance of 4 percent with 5 percent better efficiency, along ...