- S -

Spec Car

1. A term used for specification car. 2. One car in a group of identical specification cars that form their own racing category with a focus on driving skills.

Special

A high-performance, individually built car, such as a prototype.

Specialty Equipment Market Association (SEMA)

A trade association for the automotive aftermarket industry.

Specialty Repair Shop

A term used for specialty service shop.

Specialty Service Shop

A repair shop that specialized in certain vehicle components, such as engine rebuilding, brake repair, radiator repair, and so on. Also known a specialty shop.

Specialty Shop

A term that may be used for specialty service shop.

Specialty Tire

Any of several types of tires such as, all-season tire, puncture-sealing tire, snow-and-mud tire, or studded tire.

Specific Gravity

The ratio of the weight of a given volume of a liquid divided by the weight of an equal volume of pure or distilled water.

Specific Heat

The quantity of heat required to change one pound of a substance by 1o F.

Specification Car

One car in a group of identical cars that form their own racing category with a focus on driving skills. Also known as spec car.

Specifications

Technical data, numbers, clearances, and measurements used to diagnose and adjust automobile components supplied by the manufacturer.

Specs

A term used for specifications.

Speed

A rate-of-motion measured in miles per hour or kilometers per hour.

Speed Adjustment

A term used for idle-speed adjustment.

Speed Bowl

A short, oval dirt track.

Speed Density

A method of calculating airflow by sensing engine load and intake manifold pressure and other engine sensors.

Speed Flare Up

An operating condition where the engine speeds up without an increase in vehicle speed.

Speed Of Light

Light waves travel at a speed approximately equal to 186,000 miles per second, or 10 ft. per nanosecond. It is the limiting speed of the universe.

Speed Rating

A tire rating that indicates the maximum safe vehicle speed that a tire will withstand.

Speed Ratio

A comparison of the difference in speed between two moving parts such as impeller speed and turbine speed.