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 ...

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 ...

The new darling of the camshaft world is the hydraulic-roller cam. GM made it fashionable back in the late ’80s when Chevy put hydraulic-roller cams in production Corvettes and ’87 Camaro engines. At ...

In the Oct. '05 issue of Sport Truck, we started the task of powering up a GM Vortec big-block powerplant in a '96 Chevy Crew Cab dualie. The goal was to increase the amount of torque the ...