A remote starter switch and a top-quality, screw-in-type compression gaugeâ such as these models from Sears, Roebuck & Companyâ can be used to measure the pumping efficiency of an engine, as well as ...

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 ...

Besides all of the moving parts and complicated-looking pieces of metal, an engine really only needs four things to run: fuel, air, compression, and a spark. It sounds easy enough, but once there's a ...