GM has filed a patent application a variable displacement valvetrain system with rocker shaft porting and insert sleeves for ...

Meet the latest member of the Hellcat family, which combines the base “orange block” lower end with the Demon’s valvetrain to ...

Ford fans do not argue about much more fiercely than they do about pushrod versus modular V8s, because that split defines not ...

A small gap with big importance in the performance and health of an engine - here's everything you need to know.

Ford pushrod V8s were used in the second half of the 1900s, but they were phased out by Modular engines that were more ...

To obtain a thorough insight into the movements of slide-valves, and to completely understand the distribution of steam, is generally a difficult matter to first-year students and engineering ...

Abstract: Exhaust gas recirculation valves used in internal combustion engines are highly nonlinear due to its nonlinear mechanism and dry friction dominated at low valve speed that could lead to ...

If you are trying to make a race engine scream at high rpm, you eventually hit a wall where physics starts fighting back. That wall is usually valvetrain weight. At the PRI Show this year, PBM offered ...