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Safety Lap

An extra lap taken by the winner of a race to ensure that an error was not made by the official lap scorer.

Safety Ridge

A small, metal ridge just inside the tire-bead section to retain the tire position on the rim in case of a flat or blowout.

Safety Rim

A groove around the outer edge of a rim to provide a lock for the tire bead.

Safety Valve

A valve that opens to release excess pressure or heat.

Safety Wire

A strong wire, usually stainless steel, used to hold pre-drilled nuts or bolts in place, preventing them from turning.

Safing Sensor

The sensor that determines if the collision is severe enough to inflate the air bag.

Sag

A momentary decrease in throttle rate after the vehicles has gained some speed.

SAI

An abbreviation for Steering Axis Inclination; The angle of a line through the center of the upper strut mount and lower ball joint in relation to the true vertical centerline of the tire, viewed from the front of the vehicle.

Sail Panel

The roof rear-quarter panel on a notchback body style that extends from the rearmost side window to the rear window.

Sailing

A condition where chips, flakes, or scales of metal break off a part due to fatigue rather than by wear.

Sales Representative

One who sells new and used merchandise, such as automobiles, to the general public.

Saloon

The British term for sedan.

Salt Flats

The dry lake beds in the desert, such as Bonneville, used by hot rodders for top-speed runs.

Salvage Yard

A modern term for junkyard, an establishment that sells used auto parts.

Sam Sled

A consistently and unnecessarily slow drag-race drive.

Sample Point

The raw data from an ADC used to calculate waveform points.

Sample Rate

Refers to how frequently a digital oscilloscope takes a sample of the signal, specified in samples per second.

Samples

A reading taken from an electrical signal.

Sampling

The conversion of a portion of an input signal into a number of discrete electrical values for the purpose of storage, processing and/or display by an oscilloscope.

Sampling Rate

The number of readings taken from an electrical signal every second. usually in millions of samples per second.