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.

How Rockers Add PowerThe rocker arm mechanically multiplies the cam's lobe lift. It does this by moving the pushrod closer to the fulcrum pivot point than the valve stem tip is. A simple example ...

The typical four-stroke engine is made up of hundreds of parts. These parts are all designed and engineered to work together to make a prescribed amount of power, torque, engine longevity, and ...

Pivot ball rockers have been used for years ... For any true gearhead, these shaft-mounted aluminum rocker arms look like jewelry. Comp says the rocker arms themselves are fully machined and ...

Q I own a '99 Chevy Lumina with a 3.1-liter V6. This weekend I got a flashing check-engine light with a severe misfire. I took the vehicle to a shop, which told me I had two rocker arms blown ...