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 ...

Since a Pontiac V-8 is a pushrod engine (instead of being an overhead cam design), it afforded us the opportunity to explore a different rocker-arm ratio and determine its impact on power. As built, ...

Roller rockers are not glorious parts. They look trick, but they live a pretty dismal life, working feverishly, always trying to keep things stable. Glory's one thing, but are they worth the cost?

An engine's power production is directly proportional to its air-processing capacity. Internal-combustion engines consume both fuel and air, but the air is far more difficult to ingest than the fuel.