When you think about it, everything in the valvetrain between the camshaft and the valve is little more than a high-tech telephone line. All the parts and pieces-the springs, the retainers, the ...

The rocker arm employs the use of a fulcrum or pivot to increase the cam lift by a given ratio. That increase in lift is the result of moving the pushrod pivot point closer to the fulcrum. That ...

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 ...

When it comes to assembling a host of go-fast engine parts, pushrods are rarely thought of as being anything more than a simple link between the cam and the valves-that is, until one of them breaks or ...

General Motors has filed a new patent that offers a look at how the company may be rethinking cylinder deactivation for its next generation of pushrod engines. The application, published by the U.S.

GM has filed a patent application a variable displacement valvetrain system with rocker shaft porting and insert sleeves for engine cylinder deactivation. The patent application is tagged with patent ...