The condition that exists when a turbocharger is not producing power. If exhaust pressure is not sufficient to spin the turbine, the turbocharger goes off boost. Read More »

The condition that exists when a turbocharger is producing power. When exhaust pressure is sufficient, the turbine spins, and the turbo is on boost. Read More »

Regardless of the width of a track, going into and coming out of a tight turn causes the track to have room for only one line of race cars rather than two. Read More »

Drive chains consist of a number of links that contain pins, rollers, bushings, and plates. The O-rings work in conjunction with the pins, plate, and bushings to hold lubrication inside the pins and rollers. Read More »

A newer crash test where the cars collide at right angles to one another as opposed to head-on. This test is more representative of common passenger car accidents as most cars collide at some kind of angle. Read More »

An instrument for measuring the distance traveled by a vehicle. Read More »

A vehicle that has been returned to the lessor at the end of the lease period. Read More »

A lease in which the lessor is not responsible for the value of a vehicle when the lease is done. Under this arrangement the lessee is responsible for the difference between the current actual market value at the end of the lease and the residual value. Also known as a “finance” lease. Read More »

Vehicle features not included in the base model, but available at an extra price. Read More »

An egg-shaped race track with one end slightly smaller than the other. Sometimes used to describe any race track, other than a road race. Read More »