Whether you’re dealing with a mostly stock junkyard small-block or a highly modified race engine, rocker arms play a big role in freeing up horsepower and helping reduce friction in the valvetrain.

In cam-in-block, overhead-valve (OHV) pushrod engines (used in all our beloved Vettes save for the ZR-1), this actuation of intake valves is controlled by a rocker arm driven by the camshaft-lobe ...

It is just like putting a lower lift cam in our engine. Whatever your rocker arm manufacturer wants for geometric angles will be greatly affected if the parts are not installed correctly.

In the valvetrain of your typical pushrod engine, the rocker arm is a critical component that also is an excellent tuning device. To properly tune with rocker arms, though, you need to understand ...

The global automotive rocker arm market is poised for substantial growth between 2025 and 2035, driven by escalating global ...

T hough it's been called many things, the VTEC acronym stands for Variable Valve Timing and Lift Electronic Control. VVTLEC ...

Thankfully, the most basic methods are viable for this type of engine. For the record, the 440 we’re working on is equipped with a hydraulic flat tappet cam and fixed shaft-mounted rocker arms.

Honda knew the only way to get what they wanted was with a clever system that could switch the operation of cams and rocker arms on the fly, giving the engine a sort of a double personality.

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 right out of the head, and two more were working ...

Here's how a SOHC motor works, according to Cars.com: In an OHC engine, the camshaft is in the cylinder head, above the valves, and the camshaft acts directly on the valves or on rocker arms that ...

An engine can generate power through a process ... When the pushrod goes up, the rocker arm, which is attached to the top of the pushrod, moves in a seesaw like motion. While one end of the ...