Engine Block

An iron casting from the manufacturer that envelopes the crankshaft, connecting rods and pistons.

F

Fabricator

A person who specializes in creating the sheet metal body of a stock car. Most teams employ two or more.

Firewall

A solid metal plate that separates the engine compartment from the driver's compartment of a race car.

Front Clip

The front-most part of the race car, starting with the firewall.

Fuel Cell

A holding tank for a race car's supply of gasoline. Consists of a metal box that contains a flexible, tear-resistant bladder and foam baffling. A product of aerospace technology, it's designed to eliminate or minimize fuel spillage.

Groove

Slang term for the best route around a racetrack; the most efficient or quickest way around the track for a particular driver. The "high groove" takes a car closer to the outside wall for most of a lap, while the "Low groove" takes a car closer to the apron than the outside wall. Road racers use the term "line." Drivers search for a fast groove, and that has been known to change depending on track and weather conditions.

Happy Hour

Slang term for the last official practice session held before an event. Usually takes place the day before the race and after all qualifying and support races have been staged.

Handling

Generally, a race car's performance while racing, qualifying or practicing. How a car "Handles" is determined by its tires, suspension geometry, aerodynamics and other factors.