An engine that just doesn't perform as it should at high speed on the dyno or racetrack can induce a series of checks that usually first includes measuring the pressure and volume of the fuel being ...

Since the invention of the overhead valve internal combustion engine, auto manufacturers have been faced with the added complexity of the rocker arm becoming a necessary part of the valvetrain in the ...

The basic design of a rocker arm hasn’t changed much over the last 40 years. Materials have improved, bearing designs have been updated and re-engineered, but the same basic part still exists to this ...

Jesel's New Sportman Series Shaft-Mount Roller Rockers Bring Bulletproof Racing Technology To The Bolt-On Street Car Ranks Shaft-mounted rocker arms are usually reserved for the high-stress ...

Horse Sense:Although we're using our Project Real Street '89 LX coupe as the subject of this test, please understand that use of shaft-mount rocker arms is strictly prohibited in our 5.0 Mustang & ...