Computer-controlled differential used in World Rally that distributes engine's power to those tires with best grip to maximize performance.

Abbreviation commonly used when referring to the all-important science of aerodynamics.

When following another vehicle closely, the airflow off the lead vehicle does not travel across the following one(s) in a normal manner. Therefore, downforce on the front of the trailing vehicle(s) is decreased and it does not turn in the corners as well, resulting in an "aero push." This condition is more apparent on the exit of the turns.

A number that is a coefficient of several factors that indicates how well a race vehicle will travel through the air with how much resistance. Crewmen work to get the best "drag horsepower" rating they can, determining how much horsepower it will take to move a vehicle through the air at a certain mile-per-hour rate. At faster speedways teams strive to get the lowest drag number possible for higher straightaway speeds.

The science of understanding different forces acting on a moving element in gasses such as air. The application of this study to racing is credited with much of the sport's recent progress as teams learn more about drag, air turbulence and downforce.

In NHRA racing, the same as a wing - a stabilizer, generally used to create downforce, which increases stability and tire-to-track adherence at high speeds.

Mechanics can adjust a car's handling by increasing or decreasing air pressure in the tires. Flex in the sidewall of a tire acts like another spring in the suspension. Increasing the air pressure makes the overall spring rate stiffer, while lowering the pressure will make it softer. This adjustment can be made much more quickly and easily than changing a spring on a shock.

This tool uses compressed air to quickly remove wheel nuts on contact. A crew member proficient with the air wrench can save a team valuable seconds on a pit stop. Also referred to as an air gun or impact gun.

The angle of an Indy car style wing, the angle is varied from track to track to produce optimal downforce and minimize drag.

World Rally electronic engine management program that reduces the normal delay in turbocharger response to a minimum.

A bar linking suspension parts which can be adjusted to alter handling characteristics to compensate for tire wear and varying fuel loads.

Often heard in oval track racing, the apex is the geometric inside center point in a corner where a car is closest to the inside edge of the track. Drivers try to hit the apex to take the straightest line and maintain maximum speed. See also early apex and late apex.

Similar to a highway guardrail, this corrugated steel crash barrier is designed to prevent a vehicle from leaving a race track or race course. AK Steel Holding, formerly known as Armco, now produces the barrier.

The suspension adjustments made to optimise the handling of a World Rally car for smooth surfaced special stages.

Engine that uses natural, atmospheric air flow as opposed to forced induction. Used by NASCAR and NHRA Pro Stock cars while NHRA Top Fuel and Funny Car engines use forced induction.

When a driver takes his foot off the gas pedal (all the way or part way), he "backs out" or "lifts off."

Cars running near the back of the field.

Fire resistant headgear worn under a helmet by a driver to protect their face and neck.

On oval tracks, the corners are often tilted inward to provide faster speeds. On some road courses, certain turns may actually be banked outward, a very difficult type of corner known as "off-camber."

Abbreviation of Best in the Desert, an off-road racing series in the Western United States.

Unlike those recording devices in airplanes, a race car's black box contains high-tech electrical systems, which control most engine functions. More technically referred to as the Engine Electronic Controls, the Engine Control Unit or the Engine Management System.

Flag waved by the starter to signal a driver that they must immediately report to the pits for consultation related to a dangerous mechanical condition or a driving infraction. Failure to heed the flag can result in exclusion from the final results of the event. This flag may also be displayed in a rolled-up manner as a warning. Corner workers may also display a black flag if the session has been halted by the display of a red flag by the starter.

Excessive heat can make a tire literally blister and shed rubber. Drivers can detect the problem by the resulting vibrations and risk more serious damage if they choose not to pit.

Auto racing term for changing position on the track to prevent drivers behind from passing. The technique is acceptable if a car is defending position in the running order, but it is considered unsportsmanlike if lapped cars hold up more competitive cars.

Irreparable engine failure ends a racer's day.

Flag displayed by corner workers around the track to signal to a driver a faster car is either approaching (steady flag) or attempting a pass (waved flag). The driver being flagged has no obligation to do anything other than be alert, maintain the racing line and avoid intentionally obstructing the faster car.

The amount of pressure generated by a turbocharger or supercharger on a Champ Car World Series vehicle as it forces the air/fuel mixture into a forced induction engine.

Cockpit control that allows World Rally driver to alter amount of braking effort between front and rear wheels.

Nickname given to the legendary Indianapolis Motor Speedway because of its 3.2 million brick surface. Only three feet of this surface is now visible at the start/finish line.

Burning fuel during the course of a race. As fuel is burned, the car becomes lighter and its handling characteristics change, challenging the driver and crew to make adjustments to achieve balance.

When a cylinder in an NHRA racer runs lean (too much air in the air-to-fuel mixture) and excessive heat burns or melts the piston.

Spinning the rear tires in water to heat and clean them prior to a run for better traction in NHRA races. A burnout precedes every run.

The angle that wheels are tilted inward or outward from vertical. If the top of the wheel is tilted inward, the camber is negative.

Championship Auto Racing Teams Inc. acronym, the former sanctioning organization for the Champ Car World Series.

The point on a Champ Car World Series car underwing that receives the greatest amount of airflow pressure. This measurement is critical to setting front to rear balance, especially on superspeedways.

The basic structure of a race car to which all other components are attached. Champ Car World Series cars have carbon-fiber monocoque "tubs" while a NASCAR stock car has a steel tube frame chassis.

Black and white checkerboard-style flag signifies the end of a race.

An "S"-like track configuration in NASCAR and Champ Car World Series, generally designed on a fast portion of a track to slow cars. Also referred to as "esses" or a "switchback."

Also called the Tree, it is the noticeable electronic starting device between the lanes on the starting line of NHRA races. It displays a calibrated-light countdown for each driver.

A softer compound rain tire will shed pieces of rubber if a track becomes too dry.

Any race track. Also refers to the entire slate of races on a season schedule.

Driving around a track with a damaged and/or slow car to accumulate laps and, more important, points and prize money.

When a car is running by itself on the track, it's in "clean air" because other cars do not disturb the air. Also, see dirty air.

Minor contact between race cars, also often refers to hitting precisely, or "clipping," the apex of a turn.

Production-based race vehicles such as NASCAR stock cars are examples of closed-wheel cars with the suspension; wheels and tires are mostly covered by the body, as opposed to open-wheel "formula" cars.

The bell-shaped housing, or bellhousing, used to encase the clutch and flywheel on NHRA vehicles.

In NHRA racing, the progression of clutch-disc engagement controlled by an air-timer management system.

The driver sits in this are of a race car.

There is no racing activity on the track and the pits are open to people other than team members and racing officials.

Combinations of engine, gearing, suspension, aerodynamic parts, and wheel and tire settings which teams forecast will work under varying conditions and tracks. These combinations (also known as setups) are recorded and used as baselines when teams arrive at a track.

In some series, teams can choose their rubber blend for tires based on the track and weather conditions. A softer compound tire provides better traction but wears out much faster than a harder compound tire, which doesn't provide as much grip.

The equivalent of a Manufacturers' Championship, an award for the cars' builders.

NASCAR or Champ Car World Series volunteers who staff corners to notify drivers of any dangerous situations in the area.

Engine manufacturing company that has cooperatively developed racing motors with Ford for many years. Named after co-founders Mike Costain and Keith Duckworth.

On the NASCAR and Champ Car World Series circuits: stripping of the wheel stud threads when crew members hurriedly refasten lug nuts. This can be more devastating in Champ Car racing as each wheel has only one center nut/thread combination, which, if damaged, necessitates a pit pass before more severe consequences take place.

Abbreviation of of NASCAR's Craftsman Truck Series.

Champ Car World Series acronym for "Data Acquisition Geek," a computer expert who maintains a team's Data Acquisition system and analyzes the data. Teams use sophisticated sensors, transmitters, computers and software to provide information regarding the car and the driver actions, or inaction. Everything from engine stress to the driver's heartbeat can be monitored. The information is analyzed to improve handling, performance and even driver technique. Data can be acquired by connecting a computer to the car or by wireless telemetry.

To roll a few inches farther into the beams after NHRA-race staging, which causes the pre-stage lights to go out. In that position, a driver is closer to the finish line but dangerously close to a foul start.

This refers to the driver and crew making setup adjustments to achieve the car's optimum handling characteristics.

An absorbent blanket made from ballistic material, often Kevlar that surrounds the oil pan to contain oil and parts in case of an engine explosion; required for Funny Car and Champ Car World Series cars.

The bodywork at the rear underside of the car that controls underbody airflow as it leaves the back of the car. A good diffuser generates significant downforce.

The turbulence created in the wake of other race cars. At high speeds, following closely behind another car can disrupt downforce. A car following closely often will suffer understeer as a result.

World Rally driving style which places the inside front wheel over the road-side ditch.

Did not finish.

Did not qualify.

Did not start.

The downward force generated as air flows around a moving object. Champ Car World Series series vehicles use wings, while NASCAR vehicles use rear-end spoilers to create downforce. The ground-effects tunnels underneath the car also provide downforce, creating a vacuum that sucks the car to the track. Increased downforce also results in increased drag, which slows a car down.

Airflow creates a low-pressure air pocket (or draft) behind moving objects. Most notably in NASCAR, drivers try to follow opponents closely enough to enter their draft and produce a "towing" effect known as "being in the slipstream." That's right, the car creating the draft actually pulls the pursuing driver, who can ease off the throttle and save gas.

Points are awarded at each race based on finishing position. The driver accumulating the most points by the end of the season wins the drivers' championship. A similar award system is used by most major series for a manufacturers' championship.

Electronic device that controls suspension travel, assuring conformity to mandated limits.

Means a driver puts the pedal to the metal.

When an NHRA vehicle's cylinder runs too rich (too much fuel in the air/fuel mixture) and prevents the spark plug(s) from firing.

Because of more frequent driver use after rain, this clear line develops on NASCAR and Champ Car World Series tracks.

A car's weight without any liquids, such as gas and oil.

A contraction of "Dynamometer," an engine-testing device used in the shop that measures power and simulates the loads and environment of a NASCAR or Champ Car World Series racing engine.

A driver turns into a corner early.

Driving slower to conserve fuel. Champ Car World Series series cars can actually manipulate air/fuel levels (less fuel, more air) to run "lean" and conserve fuel.

Engine Control Unit or Black Box.

The Electronic Engine Control unit colloquially referred to as the Black Box.

The time it takes an NHRA vehicle to travel from the starting line to the finish line. Also called "e.t."

After NHRA qualifying, vehicles race two at a time, resulting in one winner from each pair. Winners continue in tournament-style competition until one remains.

The vertical end piece of a wing on Champ Car World Series.

Another term for the Black Box.

Manufacturer's improved version of rally car already homologated by FIA officials.

Federation Internationale de L'Automobile, the Geneva-based governing body for worldwide motorsport. Regulates and controls all the major racing and rallying activity, except events held in the United States.

A driver is pressuring another driver so feverishly that the pursuer fills the rear-view mirror.

Fire-resistant clothing that is required apparel for drivers as well as crewmembers and anyone else in the pits during a race.

The person standing on the tower above the Start/Finish Line who controls the race with a series of flags.

When drivers lock up brakes, they expose one area of their tires to excessive wear causing flat spots to develop. Flat spots lead to vibrations, which may require a tire stop.

The finish line of a timed special stage, passed at full speed by the rally cars.

Formula cars must fit within a specific set of design rules or "formula." The formulas are usually quite complex, but basic issues include minimum weight, engine displacement, vehicle dimensions, wing sizes and placement, ground-effects tunnel size and configuration, tire and wheel size, and safety considerations.

Indicated by a red light on the NHRA Christmas Tree when a car leaves the starting line before the green light, or starting signal.

A new set of tires acquired during a Pit Pass.

This gas tank for racecars is mostly borrowed from military applications for extra protection in crashes.

Ordinarily, teams fill their fuel tanks for the last practice before a race to test handling characteristics. Before then, they practice and qualify with limited fuel to decrease weight and gain speed.

A full-time job for a driver. "He has a full-time ride (or seat) next year."

Nickname for the garage area at the Indianapolis Motor Speedway.

Drivers use this to describe a mechanical part that fails.

The transmission attached to the rear of the engine. Champ Cars have "sequential" shift patterns, which is more like a motorcycle gear change than the traditional "H" pattern on most street cars.

Refers to a driver upshifting from the lowest to the highest gear.

Nickname given the driver talent search used by Roush Racing for its NASCAR Craftsman Truck Series teams. Young, aspiring NASCAR drivers are selected by Roush Racing personnel to audition in front of a panel consisting of Roush Racing NCTS experts. Elements of the audition process include a practice session where the driver assesses the chassis and makes requests to ultimately achieve the quickest and most consistent lap times. After the practice session, a 20-lap hot session takes place and the driver that shows the most improvement and knowledge not only behind the wheel, but also with adjusting setups, will be considered for the next open seat within the program.

Past winners include Kurt Busch and Greg Biffle.

A NASCAR or Champ Car World Series driver out-brakes an opponent on the inside of a turn and makes a pass.

This French term meaning "grand prize" is widely used to refer to a race. At one time in racing, it was used exclusively for a series' grand finale, usually the most important race.

Term used to describe manufacturers' special World Rally cars - regardless of event surface - sent through stages one hour before the stage start to report news of weather and surface conditions. (Ice Notes Crews are gravel cars for winter events.)

The suspension adjustments made to optimize the handling of a rally car for rough surfaced special stages.

Aerodynamically designed parts, which are fitted to the lower areas of a car to create additional downforce. Many production car owners add ground effects more for style than function.

A vertical extension to the back edge of an Indy car wing invented by racing legend Dan Gurney to generate more downforce, especially at higher angles of attack. This device is usually made of metal, aluminum or carbon fiber and is also known as a wickerbill or a return.

A slow, 180-turn, which exits in the opposite direction a driver enters.

The driver has the pedal to the metal or has "dropped the hammer" full throttle.

A fine-tuned exhaust system on NHRA cars that routes exhaust from the engine; replacing conventional exhaust manifolds.

A fire resistant head mask or balaclava.

Used to cover and protect exposed areas from flying debris, as helicopter technicians developed it to protect rotors.

A Hemi engine, used in NHRA action, has a hemispherical shaped cylinder-head combustion chamber, like a ball cut in half.

Drag racing term describes beating an opponent off the starting line and winning a race despite having a slower elapsed time. Other racers use this term to describe a good start or restart.

Examination process by which the FIA ensures that rally cars comply with regulations.

A car is performing great when all parts are "hooked up" or working well together.

The estimated power needed to lift 33,000 lbs. one foot per minute, roughly equated with a horse's strength.

A car(s) running at or near racing speed on the course.

A car(s) is/are on the track. Only crew members and racing officials are allowed into the pits for safety reasons.

When an NHRA car's cylinder fills with too much fuel, thus prohibiting compression by the cylinder and causing a mechanical malfunction, usually an explosive one.

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See gravel cars.

The machine used to remove wheel nuts. Also an air wrench or air gun.

The Indianapolis Motor Speedway. Also referred to as the Brickyard.

The International Motor Sports Association. The North American road racing sanctioning body featuring prototype GTS sports car series.

Enclosed portion of a track, which includes team garages on most oval tracks. During race weekends, this area is usually filled with large transporters; merchandise trailers, and driver and fan motorhomes.

On an oval track, this is the innermost racing line, which is usually separated from the infield by a distinctly flat surface called an apron. On road courses, the inside groove refers to the line closest to the curbs or walls forming the inner portion of turns.

Radio communication system between rally driver and co-driver (primarily for reading pace notes).

Part of a secondary NHRA timing system that records elapsed times, primarily for the racers' benefit, at 60, 330, 660, and 1,000 feet.

Ford Racing participates in seven major global motorsports series: NASCAR's Nextel Cup, Busch Series and Craftsman Truck Series, the Bridgestone Presents The Champ Car World Series Powered by Ford, World Rally, various National Hot Rod Association classes and Best in the Desert. Ford is also involved with regional and grass roots series.

A driver is distracted (or kept busy) by another driver who is relentlessly pursuing.

A brand name for a certain type of carbon fiber, used in everything from driver's helmets to bodywork to bulletproof vests used by police. A very strong, expensive and lightweight material.

An engine breaks a connecting rod, which penetrates the engine block and ends a driver's day. Announcers describe this as the engine "blowing up."

This term describes two things: the absorbent powder used to soak up fluid spills on the track (often real kitty litter) and the gravel runoff areas on the outside of many road course turns that help slow cars that go off the track.

Turbo lag. The time it takes a turbocharger to boost an engine's power from the moment the driver pushes the throttle.

One time around a track. Also used as a verb when a driver passes a car and is a full lap ahead of (or has lapped) that opponent. A driver "laps the field" by lapping every other car in the race.

Turning into a corner late and missing the optimum apex point in order to straighten out the last part of the corner. This allows the driver to accelerate earlier and harder, gaining maximum speed down the next straight.

A car can be propelled or launched into the air (all four wheels are off the ground) by hitting a severe bump or another car.

The race leader's lap. If the leader laps you for the first time, you are no longer on the lead lap.

High-tech race cars (e.g., Champ Car World Series vehicles) have engine management systems, which can adjust air/fuel mixtures. Drivers trying to conserve fuel will "run their engines lean" by using a decreased fuel/increased air mixture.

Section of a rally (usually one day) on which competitors drive not more than 1,000 km.

Most commonly used when an engine fails or "blows up." Announcers also use this term for other parts of a car that fail.

To raise or lift your foot of the gas pedal. Commonly used when drivers have to "lift" after an unsuccessful pass attempt to slow down and get back into the racing line.

This is the quickest way around a race circuit, taking advantage of braking, cornering and acceleration. For example, the line for a typical right-handed corner would begin by lining up on the left side of the approaching straight, braking hard, turning in all the way across the track to the inside curb, and then unwinding the steering wheel on the exit to release the friction of the turn, which takes the car back across the track to the outside again. The idea is to use the maximum amount of arc possible to maintain the greatest speed through the corner. The line is often visible due to the rubber laid down by cars, and interestingly is not the shortest way around the track, just the fastest.

Just like production cars, racers can lock up the brakes and even "flat spot" their tires at race speeds.

Commonly refers to a car's gas pedal because of the design. Also used to describe a brake pedal when brakes wear out because the driver has to push the pedal harder and further to slow down.

A driver ponders a pass. The driver will actually move over, look at the possible passing area and make a decision to go or not.

A car has more grip in the front than the rear end and tends to "fish tail." Drivers often report whether the car is "loose" or "tight" so the crew can make adjustments. Please see oversteer.

Adjusting a car's aerodynamic features to minimize drag, which also reduces downforce. This setup achieves better performance on straightaways and reduced cornering ability.

See "inside groove or line."

A driver is catching up to or gaining ground on an opponent.

Rocks, debris and bits of rubber scrubbed off of racing slicks while cornering that collect off the racing line. If a driver enters the marbles at an excessive speed, his car will lose grip and drive perilously into awaiting hazards as if a person walked across a bed of marbles.

Revving a car to its maximum RPM levels.

Pure methyl alcohol produced by synthesis.

The substance found inside puncture-resistant rally tires. It enables cars to complete a special stage non-stop at full speed after a puncture.

Acronym for the National Association for Stock Car Auto Racing, the sanctioning body for the NASCAR Nextel Cup, Craftsman Truck and Busch Series among others.

Abbreviation of NASCAR's Busch Series.

Term used for a new engine because it fills the space between the chassis and transmission.

The world's premier stock car racing series sanctioned by NASCAR. Term also given to the trophy awarded to each season's Drivers' Champion beginning in 2004.

Abbreviation of National Hot Rod Association

Produced specifically as a fuel for drag racing, it is the result of a chemical reaction between nitric acid and propane.

A fire- and heat-resistant material used to make driving suits, gloves, shoes, helmet liners, balaclavas and underwear. Divers wear four or five layers of Nomex, including long underwear for complete fire protection. When combined with fuel bladders that are resistant to breaking open in a crash, the risk of fire has been greatly reduced over the last 20 years. Much of this technology was developed for the military.

Driving off the best racing line. Drivers will go off line to attempt a pass or to move out of the way of faster cars.

A driver has the pedal to the metal.

Champ car style race cars, which are designed to have the suspension, wheels and tires, exposed, no fenders. Additionally, sprint cars, midgets and modifieds fall into this category.

Over total lateness, meaning a rally car has fallen so far behind schedule it is excluded.

A driver gains time and position on an opponent by applying the brakes later and deeper into a corner.

The outside racing line. Sometimes a car will handle and perform better on the outside/inside line and a driver opts not to use the optimum groove.

An oval-shaped track such as Atlanta Motor Speedway.

A condition when the front of a car has more grip than the rear. This is the same as a car being "loose."

A term commonly used by announcers meaning a pass.

The car, which leads the field to set the pace before NASCAR and Champ Car World Series races and restarts after cautions.

Special hand-written notes made by the World Rally co-driver and used on special stages to tell the driver about the corners ahead and the likely speed (pace) at which they can be driven.

The enclosed portion (or infield) of a race track.

The warm-up lap before a NASCAR or Champ Car World Series. Drivers use this lap to warm up their engines and often zig-zag to warm up tires.

Literally a "closed park" in French, it describe a secure area where rally cars must be parked at certain times.

After a big crash, which takes out a lot of cars, the track looks like a parking lot.

Usually refers to road courses which require a lot of turning and, hence, great physical strength.

Debris built up on tires from rubber bits and small stones.

A board used by Champ Car World Series crews informs drivers of lap times, lap until pit and various other information. The board is used along with team radios to keep in constant communication.

Nickname for a racing groupie.

The area designated for teams to set up temporary garages during races accessible to ("pit out") and from ("pit in") the track. Each team is allotted one pit area (or space) per car. Drivers pit so crews can refuel, change tires and make any other repairs or adjustments. Simply called "the pits" most often.

An integral part of most racing series where drivers stop in pit row so their crews can change tires, refuel, and make repairs or other adjustments.

Short for pit row or a dejected driver. Also see hot pits or cold pits.

Raised platform located at official start and finish of World Rally events, over which all competitors must drive their cars.

In some series (i.e. Champ Car World Series), you must finish a certain place or higher to receive points toward the championship. Conversely, NASCAR awards points to any driver who starts a race.

A driver will compete in races with the primary goal of earning enough points to win a championship, rather than winning the race. A driver competes conservatively in order to finish the race with enough points to maintain or achieve a series points lead.

The driver qualifying fastest is awarded the first starting position. This means the driver will start on the inside (relative to the first turn) of the first row.

In Champ Car World Series-style racing, this valve is connected to the plenum exiting the turbocharger. Champ Car World Series supplies these valves in order to restrict the pressure generated by the turbocharger.

Commonly used term for engines.

To position an NHRA car's front wheels about seven inches behind the starting line so the small yellow lights atop that driver's side of the Christmas Tree are glowing. The next step is to stage and be ready to race.

Used in Funny Car, Pro Stock. All three large amber lights on the Christmas Tree flash simultaneously, followed four-tenths of a second later by the green starting light. A perfect reaction time on a Pro Tree is .400.

Special performance-based exemptions allowed drivers who do not initially qualify for a race. A driver awarded a provisional spot must start at the back of the starting grid.

The rear end of a NASCAR or Champ Car World Series car has more grip than the front. This condition makes a car harder to turn into a corner. Commonly known as understeer.

Race cars making contact.

Softer compound tires designed for qualifying only because they provide excellent traction but only for a very short amount of time.

During designated sessions, NASCAR and Champ Car World Series teams must meet established lap times to qualify for (or enter) a race based on a predetermined number of spots available.

Qualifying determines starting positions, based on each driver's best lap time during the qualifying session or sessions. Each car is timed, and the starting grid is determined by the order of fastest cars. For road and street courses, the Champ Car World Series vehicles are on the track at the same time, which requires careful management of track position in order to avoid being blocked by a slower car. For oval events, qualifying is one car at a time, usually for two timed laps.

Race tires as opposed to qualifying tires.

Heavy duty duct tape used to temporarily repair hanging body parts, which might hinder aerodynamic features and decrease performance. Most commonly used on stock cars (e.g. NASCAR Nextel Cup), which use more paneling than Champ Car World Series vehicles and are accustomed to more contact.

Softer compound with better tread for wet-weather conditions. In dry conditions, these softer tires wear faster than harder compound tires with less tread. Also referred to as "Wets."

The time it takes an NHRA driver to react to the green starting light on the Christmas Tree, measured in thousandths of a second. The reaction-time counter begins when the last amber light flashes on the Tree and stops when the vehicle clears the stage beam.

Often called the "Reece" - is a pre-event period during which crews drive the rally route and special stages to prepare pace notes.

When displayed at the NASCAR or Champ Car World Series start/finish line, a red flag signifies an immediate halt of the session due to a dangerous condition such as a flooded track or a car blocking the track. Corner workers around the track will display black flags when this happens, and all cars are required to stop racing and slowly return to the pits. The lap in progress is discarded, and the field reverts to the order of the previous lap when racing resumes. If the race has run more that 50 percent of the laps, there is an option to declare a complete race if track conditions are not expected to improve. If a race has run less than 50 percent, it will be concluded on another date.

A normal road car (with extra safety equipment) used pre-event by World Rally crews to learn the route and stages.

An aluminum plate placed between the base of the carburetor and the engine's intake manifold with four holes drilled in it. The plate, used exclusively in NASCAR racing is designed to reduce the flow of air and fuel into the engine's combustion chamber, thereby decreasing horsepower and speed.

A vertical flap attached to a Champ Car World Series car wing for increased downforce. Please see Gurney Flap.

Modern Champ Car World Series engines are controlled by electronic "mapping" software that controls things such as fuel consumption and ignition timing. Rev limiting is used for two purposes: to keep the engine from exceeding its maximum rotational speed and exploding into bits of very expensive shrapnel, and to adhere to speed limit rules in the pit lane. The engine manufacturer sets maximum rev limits while the pit lane rev limiter is controlled by a pushbutton on the steering wheel.

Height the chassis sits from the ground on NASCAR and Champ Car World Series vehicles. Because of the relationship between the height of the ground-effect tunnels and their performance, maintaining optimum ride height is an important facet of car setup and design. However, it is hard to manage since the faster a car goes the more the aerodynamic effects press it to the ground. Many very complex methods are used to maintain a consistent ride height.

The specially prepared book of instructions, directions, maps and timings, issued to each World Rally car crew.

A race track with multiple left- and right-hand turns. Generally refers to permanent, purpose-built racing facilities. Can also refer to temporary street courses built on big city streets, which were popularized in the 1980's.

Large, sturdy bars designed to protect a driver's head if the car rolls over. Very functional in race cars but used more for style in production cars. Most production and race cars use anti-roll (or sway) bars as part of the suspension to prevent the excessive rolling in corners.

Champ Car World Series and NASCAR races begin after the pace car leaves the track while the cars are moving.

These flaps are sections at the rear of a NASCAR vehicle's roof that are designed to activate, or flip up, if the air pressure flowing across them decreases. In the case of a vehicle turning backwards, the tendency for an uninterrupted flow of air is to create lift. The roof flaps are designed to disrupt that airflow in attempt to keep the vehicle on the ground.

The spray trailing cars in wet conditions similar to the effect boats create across water.

Racing announcers use this to describe cars that make contact but don't crash. Also called "pushing and shoving."

A car is handling so well, a driver can use any racing line (or drive anywhere.) Sometimes, handling problems lead to a preferred line where the car handles better.

A car is running with little fuel. Teams qualify with a light load to achieve maximum speed.

Driving a car somewhat moderately to conserve the car's mechanical parts and lessen tire wear. This allows a driver to be more aggressive during the all-important final laps.

The best kind of NASCAR or Champ Car World Series racing tires because they've had a few laps of wear to normalize the surface.

Team of officials who check the eligibility and legality of rally cars before and after the event.

The method used by World Rally organizers to decide the starting order with fastest, most successful crews at the front.

Design of World Rally gearbox that allows fast, clutch-less gear changes up or down - one ratio at a time.

Designated areas during World Rally events where teams may carry out work on their cars subject to time limits.

Combination of settings for a NASCAR or Champ Car World Series vehicle's engine, aerodynamic features and tires/wheels, teams make continual adjustments to a car's setup during pit stops based on driver input.

Documents with recorded setups from different tracks under varying weather conditions. NASCAR and Champ Car World Series teams use this baseline to adjust setups when they arrive at a track.

First test with a brand-new car or engine. Also, in World Rally, shakedown is the pre-event day that provides teams with the last chance to test their cars on roads or trails typical of the rally.

The best engine rpm at which to shift gears. Some production and racecars have lights to indicate when a driver should shift gears.

Two or more drivers race to the end for victory.

British term for crash or accident.

Turning a car off to avoid mechanical damage or an accident. Often times, drivers shut down so a mechanical problem doesn't lead to more severe and expensive consequences. Drag racers often shut their cars down when they get out of control.

The time it takes an NHRA vehicle to cover the first 60 feet of the racetrack. It is the most accurate measure of the launch from the starting line and in most cases determines how quick the rest of the run will be.

Tires with no tread, designed for dry weather conditions.

IN NHRA racing, a multi-disc clutch designed to slip until a predetermined rpm is reached; decreases shock load to the drive wheels.

An acronym heard on the NHRA's in-car audio, referring to the electronic "Speed Limiter In Pitlane" device, which automatically keeps the car at the pit lane speed limit by holding a button on the steering wheel.

The cavity of low-pressure area created by a moving object. In racing, drivers use this slip stream to draft another vehicle.

The final 66 feet to the NHRA finish line where speed is recorded.

The spoiler is a strip of aluminum that stretches across the width of a NASCAR vehicle's rear decklid. Designed to create downforce on the rear of the vehicle, thereby increasing traction. However, the tradeoff, again, is that more downforce equals more aerodynamic drag, so teams attempt, particularly on qualifying runs, to lay the spoiler at as low an angle as possible to "free up" their vehicles for more straightaway speed. Also referred to as a "blade."

Teams on an oval track will usually have crewmembers on top of the grandstand where they can see the entire track and warn drivers of an accident or advise them where to go in traffic.

To position the front wheels right on the NHRA starting line so the small yellow lights below the pre-stage lights are glowing. Once both drivers are staged, the calibrated countdown may begin. Also, in World Rally, a stage or special stage is a speed test on public roads or forest trails, closed for the rally.

The officially recorded time taken by a rally car to complete a special stage, from standing start to flying finish.

On ovals, teams may use a different tire circumference between the left- and right-side tires on the vehicle (or stagger) on the outside wheel to improve the car's handling ability. Typically, the left-side tires would be a smaller circumference than the right-side tires to "help" the vehicle make left-hand turns. The concept has largely been eliminated with the use of radial tires in NASCAR.

Brand-new tires with the manufacturer's label (or sticker) still on the surface. Teams generally use sticker tires during qualifying then use scrubbed tires in a race.

The line where a car must stop to have its stage time recorded on the time card.

This penalty requires a NASCAR or Champ Car World Series or driver to stop at their team's pit for a timed penalty before reentering the race. This penalty can be assessed for anything from speeding in the pits to contact with an opponent.

Metal spikes fitted into the treads of World Rally winter tires to give extra grip on snow and ice.

A reinforced panel under the rally car's engine bay to protect the engine's sump and the transmission.

A World Rally stage specially set up to allow pairs of cars to race alongside each other for maximum spectator entertainment and TV appeal.

On an NHRA vehicle, a crank-driven air/fuel-mixture compressor, also called a blower. It increases atmospheric pressure in the engine to produce more horsepower.

An oval track usually measuring between one mile and two-plus miles.

A large sweeping corner on a road or street course.

A Champ Car World Series acronym heard on the in-car audio, referring to the electronic "Shift With Out a Lift" device, which allows gear shifts without lifting off the throttle, making the shift faster.

Television announcers.

Usually refers to applying racer's tape to the brake duct opening in full-bodied cars.

The time allocated for a rally car to complete a road section or special stage. A car that takes longer may suffer added time penalties.

Transparent plastic strips applied to helmet visors. As these strips accumulate debris, a driver can tear a dirty strip off for a clear view. Drivers in open cars go through about five tear-offs a race.

Short for tech (or technical) inspection. Each car is submitted to tech inspection so sanctioning body officials can confirm all chassis and engine parts meet series' guidelines. A "teched" car has passed inspections.

Highly sophisticated electronics, which transmit performance data back to a team's pit.

In Champ Car World Series racing, a braided Kevlar double strap bolted to the wheel on one end and to the chassis on the other keeps the wheel attached to the chassis in case of an accident. NASCAR requires tethers for the front wheels at events on all tracks 1.25 miles or more in length, excluding road courses. Additionally, the series requires hood tethers.

The gas pedal.

A location where rally cars must stop to have their time of passing recorded by the event organizers.

A car that is running late during a World Rally race will suffer progressive penalties (one minute late = 10 seconds penalty, etc.)

In order to provide stable tracking during NASCAR or Champ Car World Series races, all four tires are usually pointed slightly inward if viewed from overhead. More toe-in provides more stability but increased tire drag. On high-speed oval tracks, these toe settings are even more crucial. Champ Car World Series teams usually adjust toe with the most unsophisticated methodology seen in racing, using a string around the outside of the car and a caliper to measure the difference in the distance from the string between the front outside of the tire and the rear outside of the tire.

The amount a car accelerates at high speeds or in its highest gear.

Measure of engine power, described in foot-pounds of force. 10 foot-pounds of torque would raise 10 pounds of weight one foot in the air. Horsepower is a measurement of torque over a period of time.

In calibrating the NASCAR vehicle's "suspension geometry," raising or lowering the track bar changes the rear roll center and determines how well it will travel through the corners. During races, this adjustment is done through the rear window using an extended ratchet. Typically, lowering the track bar will "tighten" the vehicle and raising the track bar will "loosen" it. Also referred to as a "Panhard bar."

The chassis or monocoque of a Champ Car World Series-style race car.

A NASCAR or Champ Car World Series driver follows an opponent close enough to move into (or tuck under) their draft.

A device, which pressurizes air, pumps it into the engine and "boosts" a car's performance. Essentially the condensed air increases the air/fuel mixture to create more power.

Rough air encountered by racecar drivers.

When a car has more traction (or grip) in the rear than in the front.

A driver down one lap passes the leader to regain position on the lead lap.

The relation of the bottom of the panel extending below the NASCAR vehicle's front bumper or its ground clearance affects the amount of front downforce the vehicle creates. Lowering the valance creates more front downforce. Also referred to as "front air dam."

An area of revolving compressed air. In wet conditions, race cars can produce vortexes off their rear ends or wings. These vapor trails are similar to those produced by the engines of jet planes.

The lap before a race starts. Drivers use this parade lap to warm up their engines and tires.

Zig-zagging across the track to warm up and clean off tires, or to confuse an opponent while attempting a pass.

In NHRA this is an engine with a combustion chamber resembling a wedge in shape. In NASCAR it refers to the relationship from corner-to-corner of the weight of the race vehicle. Increasing the weight, adjustments made by turning "weight jacking screws" mounted on each corner with a ratchet, on any corner of the vehicle affects the weight of the other three corners in direct proportion. A typical adjustment for a "loose" car would be to increase the weight of the left rear corner of the vehicle, which decreases the weight of the left front and right rear corners and increases the weight of the right front. A typical adjustment for a "tight" vehicle would be to increase the weight of the right rear corner, which decreases the weight of the right front and left rear and increases the weight of the left front.

Critical to traction, vehicles are set up to provide a desired weight transfer to the rear wheels. Upon acceleration, the front wheels lift and the weight shifts to the rear wheels, which makes them less likely to spin.

Tires designed to perform better in the rain.

Used on NHRA vehicles to prevent excessive front-wheel lift.

Used by the starter, this white flag with a diagonal red stripe indicates that an emergency or service vehicle is on the track, and extreme caution should be used.

When waved by the starter, this signifies the start of the last lap of the race. When waved by a corner worker, it signifies that a slow-moving vehicle is on the track.

A structure used by NASCAR and Champ Car World Series race teams to determine the aerodynamic efficiency of their vehicles, consisting of a platform on which the vehicle is fixed and a giant fan to create wind currents. Telemetry devices determine the airflow over the vehicle and its coefficient of drag and downforce.

A transparent fiberglass surface on the front of Champ Car World Series cars designed to aid air flow and deflect turbulent air from the driver.

Aerodynamic surfaces mounted to the back of Champ Car World Series race cars to create downforce. Race car wings employ the opposite aerodynamic designs as airplane wings (which create lift to help an aircraft elevate) to create this downforce.

NASCAR sanctioned stock car racing series from 1972 through 2003.

Started in 1985, a $1 million award given to any NASCAR Winston Cup driver who won three of four selected races—the Daytona 500, the Winston Select 500 (Talladega), the Coca-Cola 600 (Charlotte), and the Mountain Dew Southern 500 (Darlington). As a Ford driver, Bill Elliott won the award in its first year. The program developed into the Winston No Bull 5, which ended in 2002.

Short for World Rally Championship or World Rally Car - depending on context.

When Henry Ford defeated the acclaimed racecar driver Alexander Winton back in October of 1901, it turned heads in the world of racing and garnered more than attention from financial supporters. His passion for racing, research and technology has sustained through 100 years of Ford Racing. In October 2001, Ford Racing celebrated its 100th year in auto racing at historic Greenfield Village with a weekend of activities that revisited Ford Motor Company's auto racing history from 1901 to 2001. Learn more about Ford Racing's history in our Milestones section.

We operate near Ford Motor Company's World Headquarters in Dearborn, Michigan - hometown of Henry Ford. But we like to think our true home is on the tracks, courses and stages of the racing world!

The Ford Fusion debuts in NASCAR Nextel Cup and Busch Series competition in 2006, marking the first time Ford has introduced a race car the same year it introduced the production version since 1968 when it launched the Torino. Race teams also employ the Ford F-150, Ranger, Explorer and Focus across the country and the world.

If displayed by a corner worker, this means the subsequent section of the track has a problem that requires that drivers slow down and not make any passes. Usually this is because a car has crashed and is in a dangerous position. If the starter displays two yellow flags, it signifies a full-course caution, which prompts the pace car to enter the track and lead the cars around at reduced speed.

Drivers moving sharply back and forth on the track often on warm-up laps to heat up their tires.