Dave from Dave's Premium Engines isn't afraid to tell it straight. Working through three fifth-generation 6.7L Cummins blocks ...

Cummins is a trusted name in diesel engines. Its oil-burner motos run everything from Ram HD trucks to buses, generators, and ...

Correctly viewed, a pushrod engine's valvetrain assembly stands at the gateway of improved power. It is not a collection of components only intended to time and provide the correct valve motion.

For years, the standard operating procedure for testing new components or ideas has been to eliminate every variable possible, make one small change, and evaluate how that affects performance. It's ...

If there is one performance limitation to hydraulic roller lifters it is the maximum rpm capability they can maintain in race applications. The internal hydraulics of standard roller lifters are ...