Some other alternative car engine technology are the hydraulic hybrid and the jet engine like starRotor. Popular Science discusses these two technologies, the $25 million X prize for a 100mpg car and ...

The engines of yesteryear were pretty simple, with tappets clackity-clacking away on cam lobes, opening valves, and making a ruckus while doing it. Mechanical lifters were adequate for valve operation ...

From the archives: The beauty of hydraulic lifters is that they self-compensate for valvetrain clearances, doing away with the need for valvetrain adjustment. To celebrate HOT ROD's 75th anniversary, ...

While the engineering community continues to explore the benefits of electric and hybrid vehicles—i.e., the environmental and renewable energy factors—the automotive market is still dependent on ...

There are very few sounds sweeter to a gearhead than a small-block spinning past 8,000 rpm. For anyone who appreciates internal-combustion engines and horsepower, a race engine spinning at high rpm is ...

Converting mechanical energy to fluid form provides the "muscle" in a fluid-power system. The power source is the key element in a fluid-power system. In a pneumatic system the power source is an air ...