Superchargers, turbochargers, nitrous oxide injection—they all do the same thing, one way or another: They make your engine act bigger, which makes your car run faster. The internal combustion engine ...

Gearheads chase horsepower like it's a search for the Holy Grail. Anything and everything that can make a car go faster, we will try, including slapping an engine-driven air pump under the hood. Or, ...