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Six Pack

A carburetor setup having a total of six barrels.

Six-stroke Cycle

The stroke cycle of an experimental engine by Toyota where combustion occurs every third revolution of the crankshaft.

Sixty Foot Time

The time it takes to cover the first sixty feet (18.3 meters) from the starting line in a drag race.

SK Steel

A shortened term for silicon-killed steel.

SKD

An abbreviation for semiknocked down.

Skid Control

A device that prevents wheel lockup during braking, to prevent skidding.

Skid Control System

A system designed to respond to a locking wheel by relieving hydraulic pressure to the locking brake.

Skid Pad

A flat area of pavement with a painted circle 300 feet (91 meters) in diameter used to determine a vehicle's lateral grip and lateral acceleration.

Skid Plate

A shield under the power train of an off-road vehicle to protect the engine and transmission.

SKIM

Acronym for Sentry Key Immobilizer Module (Chrysler).

Skin

1. The surface hardening of RTV or some body fillers. 2. The outer sheet metal of a vehicle.

Skin Effect

1. The tendency of current to crowd toward the outer surface of a conductor; increases with conductor diameter and frequency. 2. A thin, unburned layer of air/fuel mixture next to the combustion camber surface.

Skinnies

Narrow front wheels and tires.

Skinning

The removal of insulation from electrical conductors before making splices or connections.

Skins

Tires.

Skirt

A term used for piston skirt.

SKIS

Acronym for Sentry Key Immobilizer System (Chrysler).

SKS

Spark knock sensor.

Skull

The unmelted residue from the filler metal when welding.

Skunk Works

A small, secretive group within the research and development department of a large organization that focuses on more advanced research and development.