- D -

Dynamically Balanced

1. A term that often refers to a wheel and tire being balanced while spinning. 2. In general terms, the balance of any object when it is in motion.

Dynamis Response Test

A Ford term for a key on/engine running test in which a rapis acceleration is applied to the engine and the engine is checked for appropriate throttle movement, change in RPM, and change in the intake airflow.

Dynamo

An electric DC-current generator.

Dynamometer

A machine on which a vehicle may be driven, simulating actual driving conditions for emissions and diagnostic purposes.

Dynamometer

A machine used to measure the power of a given system. See engine dynamometer and chassis dynamometer.

Dyno

Short for dynamometer.

Dyno

See dynamometer.

Dytel

A trade name for a red dye found in some CFC refridgerants.

Dzus Fastener

A screw-like fastener that may be removed or installed with a quarter turn, ideal for race-car body panels that may have to be replaced quickly.