I'm wondering what kind of mathematical models there are for estimating engine performance.<BR><BR>Say you want to model the performance of 1.2L tdi VW engine or a 1.3L fiat/gm engine in a car with a ...

From vintage muscle to modern tuning, getting your Pontiac GTO’s gear ratio right can transform its personality. The right setup balances acceleration, cruising comfort, and fuel efficiency. With ...

Differences in the track, tire sizes, class rules, and other factors can cause you to rethink your selection of gears, possibly from week to week and even from the beginning to the end of an event (in ...

Optional axle ratios can tailor pickup truck power and efficiency to suit your needs as long as the gearing keeps the engine in its torque sweet spot. Often overlooked, optional gear ratios play a key ...