Picking the right valvetrain for your engine can be a daunting task. Solid flat tappet, hydraulic flat tappet, solid roller, hydraulic roller; these are the choices, made even more difficult due to ...

Besides easily made horsepower, a 347's longer stroke means it makes power a little differently. At its most basic, a longer stroke is simply more displacement, and displacement means torque.

When Chet Herbert introduced roller tappet camshafts to racing in 1950, he established an upper echelon of performance hardware that continues to carry that hard-core mystique. The roller tappet ...

Roller cam break in done the right way. Proper procedure for breaking in a roller cam to ensure engine longevity. #Camshaft ...

In the magazine industry, when we look back at past tech articles, we usually find something new we need to do, either to fix a mistake we made or just improve an existing great combination. Usually, ...