Transmission A gearbox with a number of selectable ratios, used to match the engine's rpm and torque to differing vehicle requirements. Tread squirm The flexibility in the tire tread between the surface of the tread and the tire carcass. Snow tires, with their small, deep, unsupported tread blocks, have a large amount of tread squirm. Slick racing tires, which have no tread pattern, have very little squirm. A car frame made up of rigid tubing welded together.
Tube frames are easier to manufacture in small quantities than unitized frames .
The term that describes the convex curvature on the side of a car body. Tuned intake and exhaust systems Intake and exhaust systems that, by harnessing the pressure pulses and resonances inside the various passages and chambers of the intake and exhaust manifolds, increase the flow of intake charge into and out of the combustion chambers. Turbocharger A supercharger powered by an exhaust-driven turbine. Turbochargers always use centrifugal-flow compressors, which operate efficiently at the high rotational speeds produced by the exhaust turbine. Turbo lag Within a turbocharger's operating range, lag is the delay between the instant a car's accelerator is depressed and the time the turbocharged engine develops a large fraction of the power available at that point in the engine's power curve.