For instance, a typical small-block Chevy like the much-maligned 305 has a stock rocker arm ratio of 1.5:1. A cam lobe with 0.3 inches of lift multiplied by 1.5 equals a valve lift of 0.45 inches.

Chevy's 502-cubic-inch crate engine is available as HT502, 502 HO, ZZ502/502, or SP502/605 options. As a result, the 502 big block offers a range of horsepower ratings.

A low cost and highly powerful V-6 crate engine is a winning combination. This low-cost powertrain delivers the goods.

Chevrolet Performance already offers a crate version of this lump, which is good for the very same 401 horsepower at 5,200 revolutions per minute and 464 pound-feet (629 Nm) at 4,000 revolutions ...

As a high-performance variant of the naturally aspirated 5.7L V8 LT1 gasoline engine, the LT4 featured a more aggressive camshaft, 1.6:1 aluminum roller rocker arms, lighter hollow intake valves ...

Introduced as a 265 cubic inch V-8 in 1955, the Chevy small block engines powered Chevrolets through the 1950s and 1960s, with the 305 and 350 cubic inch versions showing up more in the '80s. The ...

Longer roller rocker arms and a Lin­genfelter Performance Engineering (LPE) custom-ground camshaft provided higher lift and more duration.

The Vector W8, the first supercar built in the U.S., was an outstanding piece of engineering and one of the most impressive supercars ever.

Can roller rocker arms actually help add horsepower? The mechanically savvy will likely consider that question and say: “If you have more lift, and open the valves more, then you’ll make more ...

1. For our 327ci small-block Chevy, we’re swapping to a set of Comp Cams 1601 Ultra Pro Magnum roller rocker arms. They feature a 1.52:1 ratio and have a super sturdy design for the ultimate in ...

The extra 30 horsepower comes from a more aggressive camshaft, higher-flow aluminum heads, larger valves, higher-compression pis­tons, new high-flow fuel injectors, and roller rocker arms.