If the Chevrolet Corvette is known for one thing, it's speed. Speed is relative, though, and our expectations have grown over the years. Every Corvette generation has beefed up the specs, and one ...

The problem is as old as the internal combustion engine itself: Static valve timing is always a compromise. Figures that produce good power at lower engine speeds aren't ideal for higher-rpm operation ...

In 2010, the Mustang was released with a new look, but the same powerplant that had lived between the fenders since 2005. The outgoing three-valve 4.6-liter had served the Mustang world well, but its ...

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 ...

VTEC is an acronym for a variable valve-timing system used on Honda and Acura models since 1989. The full name is variable valve timing and lift electronic control, and the first U.S. model with VTEC ...

Precise ignition timing is essential for high-performance engine tuning and ensuring your small-block or big-block is delivering every horsepower within its capability. Since the era of poodle skirts, ...

The inlet and exhaust valve timing of a piston engine plays a large role in engine performance. Many modern automotive engines have some sort of variable valve timing, but the valves are still ...

Ford engines to avoid include the 6.0- and 6.4-liter Power Stroke engines and certain variants of the 3.5-liter EcoBoost V6.

Editor's Note: Way back in March of 1998, GMHTP ran "Opti-Spark" by Ray Bohacz, an engineering-level dissection of GM's Opti-Spark distributor. This evolutionary ignition component was a bridge ...