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.

Engine builders explain how camshaft specs relate to horsepower targets, airflow, and rpm in LS, Coyote, Hemi, and ...

Your engine feels calm at a stoplight because a hidden idle system keeps fuel, air, and spark in balance. That quiet stability is not luck, it is the result of sensors, valves, and software working ...