The engines of yesteryear were pretty simple, with tappets clackity-clacking away on cam lobes, opening valves, and making a ruckus while doing it. Mechanical lifters were adequate for valve operation ...

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 ...

Once upon a time, most car engines used solid or mechanical lifters. But unlike most fairy tales that begin that way, there was no lasting happy ending for them. Hydraulic lifters first appeared in ...