Diesel engines typically offer higher fuel efficiency and torque and longer lifespans than gas engines. How does the lack of a throttle body contribute?

One of the turbo engine's most iconic sounds is called the turbo flutter. That "stu-tu-tu-tu" sound the Nissan Skyline GTR R34 makes as the throttle closes is the sound of compressed air escaping ...

Learn more about the Fiat's Multiair Valve-Lift System Explained - Article. Read a review and see pictures of the Fiat's Multiair Valve-Lift System Explained at Car and Driver.

No diesel engine on earth is as legendary as a 12-valve Cummins. Not only is the inline-six known for its awesome stock torque figures, but the 1,100 pound iron hulk from Columbus, Indiana has a ...

Find everything you need for cleaning the idle air control valve (IACV) here: the best products, why it's important, and how to do it.

While conventional engines control air intake using a throttle valve, VVEL-equipped engines do this directly at the intake valves, continuously controlling their valve events and lifts.

In this tech article HOT ROD provides a guide to variable valve timing (VVT) technology which can be found in most late-model performance engines and we explain how hot rodders can get the most ...

At idle, vacuum from behind the throttle tries to lift the valve's piston up ... As conventional diesel engines have no throttle plate and function differently, a dump valve is not required.

A power valve plug can often work well in racing situations, where the engine only ever operates at wide-open throttle. However, it is a lousy compromise for street-driven engines that creates a ...

When car enthusiasts talk about their favorite engines, a number of classics from BMW's M division always come up–the high-strung four-cylinder from the first M3, the 3.5-liter six used in the ...