At its most basic level, an engine is an air pump. Internal combustion engines breathe fresh air and expel wasted exhaust gases to make power. Something has to tell those intake and exhaust valves ...

There is no doubt that the stud-mounted rocker systems that are commonplace on Magnum small-blocks are simpler and easier to work with. But there's a reason why any high-end race team, whether it is ...

There's no doubt that the valvetrain is the most complex part of any racing engine. It's also pushed the hardest against some incredible stresses. Nextel Cup teams and some manufacturers are putting ...

A camshaft can be a huge performance component for an engine-many people know this. Cam lobe design is often regarded as a black art. Many who have mastered it prefer it that way to keep people from ...

BLOOMFIELD, Connecticut—Jacobs Vehicle Systems has begun demonstrating two new technologies designed to help fleets and OEMs meet federal 2027 emissions targets. Just outside of Hartford, Connecticut, ...

If there is one performance limitation to hydraulic roller lifters it is the maximum rpm capability they can maintain in race applications. The internal hydraulics of standard roller lifters are ...

One way to improve diesel engine performance and to reduce emissions is improving power density and combustion cycle efficiency. It can be done by increasing combustion pressure and engine speed ...

Eaton’s valvetrain portfolio for diesel off-highway vehicles now features cylinder-deactivation (CDA) technology that allows for variable valve actuation with hydraulic lash adjustment (HLA) ...