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Indy 500

A race held every Labor Day weekend at Indianapolis Motor Speedway. It is an American classic, the single largest spectator-attended sporting event in the world.

Indy Car

An open-wheeled vehicle built especially for Indy and CART racing.

Indy Lights

A junior series of Indy racing sponsored by CART.

Inert Gas

A gas that normally does not combine chemically with materials.

Inertia

1. The property of a moving object that causes it to resist any change in speed or direction. 2. The tendency of an object in motion to keep moving and the tendency of an object at rest to remain at rest.

Inertia Lock Retractor

A passive seat-belt system that used a pendulum mechanism to lock the belt tightly during a sudden change in movement.

Inertia Weight

A small, steel flywheel used to dampen drive-line vibrations on certain applications; generally located on the slip yoke, drive pinion yoke, or near an end of the drive shaft.

Inertial Scavenging

An exhaust system that uses the momentum of flowing gases to pull more gasses through.

Infield

An area enclosed by an oval track or a road course.

Infinite

Having no limits whatsoever. Boundless, thus, an infinite number is one more than the largest possible number.

Inflation Pressure

The amount of air pressure required to inflate a tire, measured in psi or kPa.

Information Center

The electronic display in some luxury vehicles that shows such data as the date, inside and outside temperature, trip distance traveled and distance remaining, time of departure and estimated time of arrival, average and current speed, average and instantaneous fuel economy, fuel used and remaining, and often, an appointment reminder.

Information Sheet

A form that is used to record pertinent information about a vehicle.

Information Superhighway

A popular buzzword to describe the internet.

Infrared Exhaust Analyzer

An instrument able to detect and measure hydrocarbons, carbon monoxide, carbon dioxide, and oxygen levels.

Inhibitor

A substance used to reduce the rate of a chemical or electrochemical reaction.

Injecrot Bobbin

[1] A small plastic device the injector windings are wound arround.

Injected

An engine equipped with a fuel injector.

Injection Cylinder

A term used for oil-injection cylinder.

Injection Valve

A term used for fuel injector.