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 ...

This may feel like specialist information, but for serious engine builders and home mechanics with a project themselves, checking the pushrod length may be a pain in the neck, but it’s worth doing.

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 ...