DICTIONARY OF AUTOMOTIVE TERMS - Profile Pictures for ...

[3] Thumping sound coming from large stereo woofers
boost:
[1] The amount of positive pressure created in an intake system above
normal atmospheric pressure by a turbocharger or supercharger. Normal
atmospheric pressure is 14.7 psi. A blower providing 10 psi boost
increases the pressure to 24.7 psi. Boost is sometimes measured in
atmospheres where one atmosphere equals 14.7 psi. Thus 24.7 psi is about
1.7 atmospheres.
Also see
on boost
off-boost
[2] The action of jump starting one battery from another.
[3] To increase power, charge, or pressure, etc.; or to amplify volume,
audio sound, etc.
boost-activated ignition retard:
On a turbocharged engine, a system which retards the ignition timing
when the intake manifold is under pressure, in order to reduce the chance
of detonation
boost-controlled deceleration device:
(BCDD) a valve that, during deceleration, is triggered into action by high
intake manifold vacuum the BCDD valve allows an additional source of
air and fuel to enter the intake manifold during deceleration to obtain a
more burnable mixture
boost control valve:
See blowoff valve
booster:
[1] A radio device which amplifies the signal or the audio output to the
speakers. Because of its size it is mounted in the glovebox, under the dash,
in the center console, under the seat, or in the trunk.
[2] A device incorporated in vehicle system (such as brakes and steering),
to increase the pressure output or decrease amount of effort required to
operate, or both.