| Q-jet
| A Rochester Quadrajet four-barrel carburetor. |
| Q-ship
| An innocent looking vehicle with outstanding performance. |
| QADP
| (Porsche) Deviation of Specified Air Mass |
| QDM
| Quad Driver Module |
| QDR
| Quad Driver: See Quad Driver |
| QSOL
| (Porsche) Specified Air Mass |
| quad
| 1. A four-barrel carburetor. 2. Four headlamps, two on either side of the vehicle. 3. A four-wheel drive vehicle. |
| quad carburetor
| A four-barrel carburetor. |
| Quad Driver
| [1] A dipole (DIP) device which contains circuit drivers to control outputs [2] an integrated circuit used to turn certain components on and off [3] A quad driver has four separate out puts (switches) and can turn on and off up to four circuits and or components independently such as four fuel injectors |
| quad ring
| A rubber or plastic sealing ring with square sides. |
| quad valve head
| A cylinder head with four valves, two exhaust and two intake, per cylinder. |
| quad-4
| A high-performance, four-cylinder engine developed by General Motors. |
| Quadra-Trac
| A full-time, four-wheel drive system. |
| quadrant
| 1. A device used to indicate the position of the gear selector of an automatic transmission. 2. One quarter of a circle. |
| qualify
| To earn a starting position in a race. |
| quantum theory
| The theory that considers light to have mass, as opposed to the wave theory, which considers light to be without mass, and the transfer of energy is in definite discrete amounts. |
| quarter
| A term used for a quarter-mile drag strip. |
| quarter elliptic spring
| One half of a semi-elliptic spring having one end attached tot he chassis frame and the other attached to the axle. |
| quarter mile
| 1. A distance of 1,320 feet (404) meters). 2. The standard distance for a drag strip. |
| quarter mile drag strip
| The most popular standard distance for a competitive drag-racing strip. |
| quarter panel
| A term used for the metal work for either the front or rear corner of a vehicle body. |
| quarter race cam
| A camshaft that has been regrown to provide better than standard performance. |
| quarter-speed cam
| A camshaft that rotates once for each four revolutions of the crankshaft. |
| quarts-iodine
| A lamp containing gaseous iodine (I). |
| quartz
| A mineral found in nature as a hexagonal cross section. It is pointed at one end and has a fractured base where it broke from the rock formation in which it grew. |
| quartz crystal
| A thin slab cut from quartz ground to the proper thickness so it will vibrate at a desired frequency when supplied with energy. |
| quartz-halogen
| A type of high output lamp containing a gaseous halogen; used for headlights, driving lights, or fog lights. |
| Quattro
| A full-time, four-wheel drive system by Audi. |
| quench
| To suddenly cool a heated metal or alloy by dousing it with water or oil. |
| quench area
| Any internal portion of a combustion chamber which causes combustion to cease because of the temperature drop in the air/fuel charge where it meets this area. |
| quick change
| Any system or sub system that is designed for ease and speed for changing or replacing. |
| quick charger
| A battery charger that is designed to charge or boost a battery in a short time. |
| quick coupler
| A coupler that allows hoses to be quickly connected and/or disconnected. Most shop air hoses, for example, are equipped with quick couplers. |
| quick release valve
| A device used to exhaust air as close as possible to the service chambers or spring brakes. |
| quick take-up master cylinder
| A dual master cylinder that supplies a large volume of fluid to the front disc brakes on initial brake application, which takes up the clearance of low-drag calipers. |
| quick take-up valve
| The part of the quick take-up master cylinder that controls fluid flow between the reservoir and the primary low pressure chamber. |
Auto & Car Glossary
