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 ...

An engine's static compression ratio is only a rough indicator of its ability to tolerate a particular gasoline octane ratio. The real key isnumbers. Most engine builders say 175 to 185 psi cranking ...

Compression Ratio = Absolute discharge pressure/Absolute suction pressure Most technicians realize their service gauges read zero when not connected to a system, even though there is a pressure of ...