Correct valvetrain geometry is critical to ensure trouble-free operation of an engine, especially during high-rpm operation. When building a new engine, many people simply reuse the original pushrods ...

The most common reasons for using a pushrod that is longer or shorter than stock are: a decked cylinder block or heads, thicker/thinner head gaskets, small base-circle camshafts, aftermarket rocker ...

The modern stock car racing engine is a product of two very interesting, and normally competing, dynamics. First, there are the rules. Aimed at providing safety, cost containment, and a level playing ...

Introduced as a successor to the venerable small block Chevy, the LS engine family had a good run. Recently replaced by the fancy, direct-injected, LT-series engine, the LS still reigns supreme in ...