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Part of the brake system that holds the brake pads. When the driver pushes the brake, the calipers push both brake pads against the brake disk to slow the car.

The tilt of a tire measured in degrees from vertical. That means the wheel is not perfectly verticall on the road surface, this to optimize the tire surface that is in contact with the ground, thus highering cornering speeds. Teams will change the camber of tires to touch more or less of the racing surface depending on tire wear or tire temperature.

As a middle man, the car chief works closely with the crew chief to determine the setup of the car and joins the crew to physically make the changes during a pit stop.

Developed for the aerospace industry, it looks like fiberglass but is lighter and stronger. The chassis of a typical Indy car is made of carbon fiber and aluminum.

Part of the engine where air and fuel mix in an internal combustion engine.

Designed to reduce horsepower and speed. A thin metal plate, with four holes drilled, measuring one inch wide or less, placed between the carburetor and the manifold to restrict the flow of air into the carburetor.

The pit crew member behind the car on the left side that holds a special container which collects gas that overflows from the gas tank during a pit stop.

A yellow flag signals trouble on the racetrack, usually the result of an accident. Cars line up behind a pace car and travel at a restricted speed until the green flag is waved to resume racing. Teams prefer to make their pit stops during a caution because there is less risk of losing positions.

A yellow flag used to alert drivers to slow down and follow a pace car because of an accident or a roadway hazard like oil or debris. Under the caution flag, a driver must travel at a reduced speed and cannot pass other cars to advance their position.

The framework of a race car (and any motor vehicle), including the suspension and wheels, to which all other elements of the car are connected. A modern F1 race chassis is constructed of carbon fibre composite material and provides a structure that is durable, extremely light and strong.

Machine that measures the amount of power transferred from the wheels to the ground.

A tight combination of corners inserted into a straight on a racing circuit. Supposed to slow down the cars.

Is the person ultimately responsible for all operational on-track issues related to the running of a motor race meeting.

The progression of clutch disc engagement controlled by an air-timer management system.

Carbon dust created when the surfaces of the clutch discs wear as they slide together during the clutch lockup process.

Also called navigator, co-driver is the one sitting next to the driver and calling out notes.

The area of the chassis, or monocoque, in which the driver sits. The driver has a custom-made seat, and once strapped in he is effectively only able to move his head, arms and legs

A deformable material positioned around the cockpit of Open Wheel cars, particularly around the driver's head. Intended to provide protection (accidents) and support (g-forces)

Timed speed test on roads that are NOT closed to the public traffic. Compare to special stage.

Blend of rubber used to achieve optimal performance from different tires. Softer tires offer more grip but wear out sooner. Softer tires also warm up faster (due extra movement inside the rubber) and generally provide more performance.

The volume of a cylinder compared to the volume it compresses to when the piston is fully extended. The higher the ratio, the greater the potential for energy - thus more horsepower. For example, the compression ration in NASCAR Winston Cup is 12:1

An signed agreement between the FIA and teams, in force from 1997. Consists of a series of provisions that deal with the distribution of TV and race participation income as well as changes to the sporting and technical regulations. In the mean time it iss updated a few times and signed by all teams.

A constructor is the chassis manufacturer. In most cases, this is different to the engine manufacturer, and the name of the chassis manufacturer is always given before that of the engine manufacturer. In the event of winning the Constructors' World Championship, the title is awarded to the chassis manufacturer.

Drivers receive bonus money from companies for using its products and placing its decal on the car

As the leader of the race team, he oversees the construction and fine-tuning of a race car. Throughout race weekend he communicates what changes should be made to the race car and on race day he determines the race strategies.

In any form of motorsport drivers seeks shortest possible route around the intended route. While on any track racing (F1 for example) drivers are limited to the track by either barriers or low traction outside paved surface, rally is different. It is often useful to clip inside of the bend, so-called apex, to both reduce total distance by few centimeters and maintain higher speed through corner.