Any gearhead worth his or her salt knows that whether it's a SOHC, DOHC, or OHV engine, the camshaft is considered the brain of a four-cycle internal combustion power plant. The camshaft's profile ...

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 other ...

GM has filed a patent application a variable displacement valvetrain system with rocker shaft porting and insert sleeves for ...

Q:I have a 327 in my '31 Ford that features nearly the same cam and components as the one you referenced recently in Pit Stop (Nov. '12). Since a 1.6:1-ratio rocker arm will push the valve a little ...

The Lash Effect: Solid lifter valvetrains depend on accurate lash to make maximum power and dependability. Here’s how to do it right A properly tuned engine is an incredible mix of components all ...

Roller rockers are not glorious parts. They look trick, but they live a pretty dismal life, working feverishly, always trying to keep things stable. Glory's one thing, but are they worth the cost?