Last month's "How It Works" story gave you the basics of the four-stroke cycle, describing the motion of the intake and exhaust valves in relation to the piston moving up and down in the cylinder.

Thumb through the pages of any performance magazine and you'll find it all over the place--camshaft lingo. Lift, duration, base circle, dual-pattern, overlap, rocker-arm ratio; whether you're new to ...

It's been all the talk on internet forums, club meeting hangouts, and in enthusiast garages across the nation—the loss of zinc and other protective "barrier" chemicals in modern oil damaging ...

Surging gas prices and impending regulations are causing automakers to hunt for ways to increase the efficiency of gasoline engines. One of the chief inefficiencies of these engines is the restriction ...

Cars are intricate machines that rely on a series of chemical and mechanical processes to work properly. When things go wrong with one of those processes, your car can start to make some strange ...

SAE International Journal of Engines, Vol. 1, No. 1 (2009), pp. 1357-1365 (9 pages) ABSTRACT From the viewpoint of protection of the global environment, reduction of CO₂ emissions are high-priority ...

The camshaft is driven off the crankshaft, usually by a chain called a timing chain. Timing belts and gear drives are also used. In any case, the cam always rotates at half of crank rpm. It takes two ...