Dear V-8 Buick members, I just came across this really well done and elegant website that illustrates the various engine cycles commonly used today. Even if you know engines inside and out, you'll probably get a kick out of this: http://www.animatedengines.com/ Its a great site for explaining the basics of an engine to younger folks, the "fairer" sex, and so on. Enjoy! Cheers, Edouard :beer