Want to know how healthy or unhealthy your engine really is? Get yourself a compression tester and find out. Despite how complex many modern vehicles are, you can do many common repair and maintenance ...

Horsepower and torque are all about cylinder pressure. Compression ratio, cam timing, cylinder head flow, and all the rest of the goodies that go into an engine aren't worth much if what enters the ...

We've all heard of Cosworth's three-cylinder engine test bed, used to develop the 1,000-horsepower V12 for the Aston Martin Valkyrie. Dedicated Cosworth fans may even have seen the company's other ...

Rob Morehead snaked a camera on a cable up the rocket engine’s nozzle looking for anomalies caused during the combustion of supercold liquid oxygen and liquid methane. He ran his fingers along the ...