While HEMI engines have a reputation for toughness and durability, there is one common weak spot in the design: HEMI lifters ...

Editor's note: I met Jack Rhoads in 1967 when his father, James, conceived of a then-revolutionary way to vary valve timing as a function of engine speed. Today the concept is as valid as it was back ...

Camshaft technology is continually changing. From new lobe profiles to various forms of lobe placement, each manufacturer takes its own approach to modern performance. While flat-tappet grinds remain ...