Overhead cams are a more efficient method of actuating the valves than with a pushrod, but someone in Detroit never got the memo. And thank goodness they didn't. With production pushrod mills turning ...

When trying to decide between two camshafts for an engine that will spend a majority of its life operating at low-to-moderate rpm on the street, it's better to err on the side of caution. That means ...

The debate over the optimum rocker arm ratio to use has dragged on probably since the invention of the pushrod V-8. Even though Chevrolet made the decision easy for us when it engineered the original ...