NEW SHAFT ROCKER ARM SYSTEMS...

COMP Cams® Performance Rocker Arms
Rocker Arms are an important part of the valve train, providing not only a means of actuating the valves thru a fulcrum utilizing the lifter and pushrod, but also provide a means of multiplying the lift ratio. Camshaft design has advanced by leaps and bounds over the last 3 decades, but overhead valve engines with centrally located camshafts still use lifters, pushrods and rocker arms as a means of opening and closing the intake and exhaust valves. Although advancements in rocker arm design have occurred, the basic principles have remained the same. We now have shaft-mounted rockers available for sophisticated head designs, but the primary means of actuation is a single rocker arm per valve mounted on a stem or stud in the cylinder head. Materials used in construction of the rocker arms has also advanced, moving from stamped steel to aluminum, forged steel or stainless steel. Light weight is still crucial to efficient operation, but strength also plays a major function in longevity. Roller tips and needle bearing fulcrums have helped reduce friction and heat, thereby increasing expected life-spans. COMP Cams® patented stainless steel rocker arms combine strength, lightweight, and superior tolerances over rocker arms used in past racing applications.

In the early 80’s COMP Cams® pioneered the roller tip rocker arm industry and turned the performance market upside down with the introduction of the Magnum Roller Tip Rocker Arm™. Investment castings, featuring superior ratio accuracy and chrome-moly roller tips. 20 to 30 horsepower gains were not uncommon with this new rocker arm design. Street Performance applications benefited most from this new technology, but Bracket Racers also found an inexpensive way to improve their valve train performance without breaking the budget. Increased usage in mild race applications led to the design of COMP Cams™next revolutionary break-thru, the Pro Magnum Roller Rocker Arm.

The success of the Magnum Rocker caused COMP Cams® engineers to investigate the possibility of creating a lightweight steel rocker arm that could provide a friction reducing fulcrum using needle bearings, and a roller tip for reduced friction between the rocker and the valve stem, but still be less expensive than stainless rocker arms. The Pro Magnum Rocker Arm™ proved to be the answer, and to the amazement of the performance industry, outperformed the majority of the aluminum rocker arms on the market at that time. Lighter mass at the valve also allowed for increased RPM, while the strength of steel made for increased durability. The Pro Magnum Rocker Arm quickly became one if the most popular rocker arms in performance history.

Today COMP Cams® has Magnum™, Pro Magnum™, Aluminum and Hi-Tech Stainless Steel Rocker Arms available for most all performance applications. A wide range of ratios, stud diameters and applications make COMP Cams® the logical choice for performance rocker arm technology.