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Bug Sheild

See bug guard.

Buggy

A small, lightweight, off-road vehicle.

Bugle

A high spot or crown in stretched metal.

Build

As its name implies; for example, to modify an engine for racing it is to build it.

Buildup Time

The time required to form a magnetic field around the primary winding of the coil when current is allowed to flow through it in a conventional ignition system.

Bulb

The glass envelope that contains an incandescent lamp or an electronic tube.

Bulkhead

English term for Firewall

Bulkhead Connector

A connector for wires or hoses located where they must pass through a partition or lead to another.

Bull Ring

A dirt, oval track, generally one-half mile or less.

Bullbar

See grille guard.

Bullet Muffler

A muffler design that is very common in racing applications where space is tight. Most are a type of straight-through absorption muffler, and most are quite loud because of their compact size.

Bulletproof

Indestructible.

Bullnose

The smooth nose of a hood when the ornament has been removed and the holes filled in.

Bump

To be forced out of a racing lineup by a faster qualifier.

Bump Shop

An auto body repair facility.

Bump Spot

The slowest qualifying position for a race.

Bump Steer

The tendency of the steering to veer suddenly in one direction when one or both of the front wheels strikes bump.

Bump Steer

A loss of directional stability that is caused when a wheel and tire travel over an uneven road surface.

Bump Stick

The camshaft.

Bump Stops

Cushioning devices that are used to limit the amount of suspension travel and prevent damage to suspension components. Most bump stops are made of rubber.