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Independent Publishers

Publishers that provide service and repair information on a variety of subjects, such as automobiles.

Independent Rear Suspension (IRS)

1. A suspension system in which both rear wheels are free to move independently of the other, providing a reduction of unsprung weight as well as overall vehicle-weight reduction. 2. An independent suspension system at the rear of a vehicle.

Independent Service

General or specialty service provided by independent garages on all types and makes of vehicles.

Independent Suspension

A suspension system by which a wheel on one side of a vehicle can move vertically without affecting the wheel on the other side, and wheel jounce or rebound travel of one wheel does not directly affect the movement of the opposite wheel.

Index

1. To examine and adjust rod journal spacing and alignment. 2. The elapsed time assigned to various classes in drag racing used to calculate starting-time differences for handicap or bracket racing. 3. Installing a camshaft relative to the crankshaft so the valves open and close at precisely the right time.

Indianapolis Motor Speedway (IMS)

A very popular race course, not in Indianapolis, but in Speedway, Indiana.

Indianapolis Raceway Park (IRP)

Better known as Indy. The site of the U.S. Nationals on Labor Day weekend.

Indicated Horsepower (IHP)

A measurement of power developed by the combustion processes in the cylinders, not considering friction.

Indicated Mean Effective Pressure (IMEP)

The average of the pressures developed in the cylinders during the four-stroke cycle, intake, combustion, exhaust, and compression.

Indicated Speed

The vehicle as indicated on a speedometer.

Indicated Torque

Torque as calculated from the indicated mean effective pressure, which is an actual indication of output developed within the cylinders.

Indirect Injection (IDI)

A system in which fuel is injected into a prechamber, where it is ignited before entering the main combustion chamber.

Indium

One of the chemical elements. Atomic number 49. Symbol In. With three electrons in its valance shell it is used as a doping agent to create a "P" type semiconductor.

Inductance (L)

The capability of a coil to store energy in a magnetic field surrounding it which results in a property that tends to oppose any change in the existing current flow in the coil.

Induction

1. A synonym or intake. 2. A process whereby an electromagnet or electrically charged object transmits magnetism or an electric current to a nearby object without making physical contact. 3. The process by which a voltage is induced into a conductor by a changing magnetic field.

Induction Coil

An electrical device that receives low battery voltage in its primary winding and delivers pulsating high voltage in its secondary winding as the primary field is energized and collapsed by use of a set of points.

Induction Hardening

A process of hardening the surface of a part by placing electric coils next to it.

Inductive Reactance

An opposing current or voltage created in a conductor whenever there is a charging current flow in that conductor.

Inductive Reluctance

A statement of a material's ability to strengthen the magnetic field around it.

Indy

1. Short for Indianapolis Motor Speedway. 2. Short for Indianapolis Raceway Park.