Drag racers have been searching for tricks to gain horsepower since day one, and there are lots of ways to do it without spending a tremendous amount of time or money. One of the biggest downfalls of ...

Bruiser ("Ground & Pound," October '09) seemed well at home in the upper rpm. A closer look revealed a less-than satisfactory issue with valve float and subsequently a loss in power. It's been known ...

There are several broad rules of thumb that provide clues to whether increasing rocker-arm ratio will prove to be a performance boon with a given engine, cylinder head, and camshaft combination.