"Bullwinkle, that trick never works. Why don't you figure out how to make hydraulic roller lifters survive big spring pressure." "Huh?" Like Bullwinkle, hydraulic roller lifters get no respect. It ...

The rules in some racing classes restrict competitors to running hydraulic valve lifters. Cheaters have been known to run hydraulic lifters on a mechanical (solid) cam profile. Solid cam profiles ...

It's been all the talk on internet forums, club meeting hangouts, and in enthusiast garages across the nation—the loss of zinc and other protective "barrier" chemicals in modern oil damaging ...

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 ...