Device in a driver’s earpiece that measures the forces a driver’s head experiences in an impact.

The maintenance of contact between two touching objects. Adhesion refers to a static condition, whereas traction (also known as “grip”) refers to a moving condition.

As applied to racing, the study of the interaction between air and the resistance and pressures created by the passage of a moving car through the air.

The area of a turn near its center.

The paved (and usually flat) portion of a racetrack that separates the racing surface from the infield. Generally, a concrete wall or steel guardrail separates the apron from the infield.

Bubbles on the surface of a tire created by overheating of the tread compound.

Manifold intake pressure above ambient atmospheric pressure.

External opening to fuel cell. Fuel hose connects securely to buckeye during refueling.

Degree to which right-side tires lean in toward the car (from the top of the tire) and the left-side tires lean out. A useful tool to gain grip in corners by maximizing the amount of tire-to-track con [..]

A rotating shaft in the engine that opens and closes the engine’s intake and exhaust valves.