Shubeck lifters

[Dave Noll]

Originally Posted by ProfessorRock

I just want to know about the crown and how they rotated on the cam lobe

A flat tappet cam is ground with between 4 - 6 minutes of angle across the lobes of the cam. The crown on the lifter meets the 6 minute angle of the lobe, as the lobes are not centered directly below the lifter bores. As the cam spins, the angle on the lobe grabs one side of the crown on the lifters and spins them in their bores.