for Sportsman or Pro racing this season: Comp Cams' new Sportsman roller lifters. Come on in for more... Comp Cams' Sportsman Solid Roller Lifters are premium-quality, high-value components designed ...

Depending on your budget, finding an affordable upgrade for your mill can be challenging and even a bit disappointing. That's not to say we all don't want to tear a motor down and start from scratch ...

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.

Any gearhead worth his or her salt knows that whether it's a SOHC, DOHC, or OHV engine, the camshaft is considered the brain of a four-cycle internal combustion power plant. The camshaft's profile ...