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 ...

The concept of placing a small wheel at the end of a tappet to reduce friction has existed for decades, and in fact, roller camshaft setups have been available for the American V-8 engines we tinker ...

Critical for achieving max cam performance, preventing piston-to-valve contact, and as a doublecheck against assembly errors, accurately locating TDC and degreeing in a custom cam should be a routine ...

Decades ago (OK, half a century or more), there was a product advertised in many of the performance magazines called the Varicam. The idea was a set of springs attached to a centrifugal device that ...