Drag racing is a type of motor racing in which automobiles or motorcycles compete, usually two at a time, to be first to cross a set finish line. The race follows a short, straight course from a standing start over a measured distance, most commonly , with a shorter, distance becoming increasingly popular, as it has become the standard for Top Fuel dragsters and Funny Cars, where some major bracket races and other sanctioning bodies have adopted it as the standard. The is also popular in some circles. Electronic timing and speed sensing systems have been used to record race results since the 1960s.
The history of automobiles and motorcycles being used for drag racing is nearly as long as the history of motorized vehicles themselves, and has taken the form of both illegal street racing and as a regulated motorsport.
History Drag racing started in the 1940s. World War II veterans were prominently involved, and some early drag races were done at decommissioned aircraft bases with landing strips that made them an ideal place for the sport. In 1951, Wally Parks formed the National Hot Rod Association (NHRA).Post, R. (2001). High performance: The culture and technology of drag racing, 1950–2000 (Rev. ed., Johns Hopkins studies in the history of technology). Baltimore, Md.: Johns Hopkins University Press. The organization banned the use of nitromethane in 1957, calling it unsafe, in part through the efforts of C. J. Hart; the ban would be lifted in 1963.Nostalgiadragworld.com (retrieved 5 May 2017)
Several other racing organizations were created over the past several decades, such as the Professional Drag Racers Association (PDRA) founded in 2014.What is PDRA Racing Cars? https://www.metroleague.org/what-is-a-pdra-racing-cars/
Thanks in part to the Discovery series Street Outlaws, fandom for drag racing has seen a resurgence in the past decade.
Basics of drag racing
Starting Push starts to get engines running were necessary until the National Hot Rod Association (NHRA) mandated self-starters in 1976.Burgess, Phil, National Dragster editor. "Obsolete skills, part 1: On the track", at NHRA.com (retrieved 22 September 2018) After burnouts, cars would be pushed back by crews; this persisted until NHRA required reversing systems in 1980. Don Garlits was the first to do burnouts across the starting line, which is now standard practice.Tocher, Ian. "'Big Daddy' Describes Birth of the Burnout", published 18 March 2018, at Drag Illustrated (retrieved 23 September 2018) Each driver then backs up to and stages at the starting line.
Prerace preparations Before each race (commonly known as a pass), each driver is allowed to perform a burnout, which heats the driving tires and lays rubber down at the beginning of the track, improving traction. The cars run through a "water box" (formerly a "bleach box", before bleach was replaced by flammable traction compound, which produced spectacular, and dangerous, flame burnouts; the hazard led NHRA to mandate use of water in the 1970s).
Modern races are started electronically by a system known as a Christmas tree, which consists of a column of lights for each driver/lane, and two light beam sensors per lane on the track at the starting line. Current NHRA trees, for example, feature one blue light (split into halves), then three amber, one green, and one red. New Tree implemented for NHRA VisitMyrtleBeach.com Four-Wide Nationals When the first light beam is broken by a vehicle's front tire(s), the vehicle is "pre-staged" (approximately from the starting line), and the pre-stage indicator on the tree is lit. When the second light beam is broken, the vehicle is "staged", and the stage indicator on the tree is lit.NHRA.com Basics of Drag Racing Vehicles may then leave the pre-stage beam, but must remain in the stage beam until the race starts.
Staging Once one competitor is staged, their opponent has a set amount of time to stage or they will be instantly disqualified, indicated by a red light on the tree. Otherwise, once both drivers are staged, the system chooses a short delay at random (to prevent a driver being able to anticipate the start), then starts the race. The light sequence at this point varies slightly. For example, in NHRA Professional classes, three amber lights on the tree flash simultaneously, followed 0.4 seconds later by a green light (this is also known as a "pro tree"). In NHRA Sportsman classes, the amber lights illuminate in sequence from top to bottom, 0.5 seconds apart, followed 0.5 seconds later by the green light (this is also known as a "sportsman tree" or "full tree"). If a vehicle leaves the starting line before the green light illuminates, the red light for that lane illuminates instead, and the driver is disqualified (also known as red lighting). In a handicap start, the green light automatically lights up for the first driver, and the red light is only lit in the proper lane after both cars have launched if one driver leaves early, or if both drivers left early, the driver whose reaction time is worse (if one lane has a -.015 and the other lane has a -.022, the lane of the driver who committed a 0.022 is given the red light after both cars have left), as a red light infraction is only assessed to the driver with the worse infraction, if both drivers leave early. Even if both drivers leave early, the green light is automatically lit for the driver that left last, and they still may win the pass (as in the 2014 NHRA Auto Club Pro Stock final, Erica Enders-Stevens and Jason Line both committed red light infractions; only Line was assessed with a red light, as he was -.011 versus Enders-Stevens' -.002).
Measurements Several measurements are taken for each race: reaction time, elapsed time, and speed. Reaction time is the period from the green light illuminating to the vehicle leaving the staging beams or breaking the guard beam. Elapsed time, often abbreviated E.T., is the period from the vehicle leaving the starting line to crossing the finish line. Speed is measured through a speed trap covering the final to the finish line, indicating average speed of the vehicle in that distance.
Except where a breakout rule is in place, the winner is the first vehicle to cross the finish line, and therefore the driver with the lowest combined reaction time and elapsed time. Because these times are measured separately, a driver with a slower elapsed time can actually win if that driver's advantage in reaction time exceeds the elapsed time difference. In heads-up racing, this is known as a holeshot win. In categories where a breakout rule is in effect (for example, NHRA Junior Dragster, Super Comp, Super Gas, Super Stock, and Stock classes, as well as some dial-in classes), if a competitor is faster than his or her predetermined time (a "breakout"), that competitor loses. If both competitors are faster than their predetermined times, the competitor who breaks out by less time wins. Regardless, a red light foul is worse than a breakout, except in selected sportsman and junior classes, where exceeding the absolute limit is a cause for disqualification.
Bracket system Most race events use a traditional bracket system, where the losing car and driver are eliminated from the event while the winner advances to the next round, until a champion is crowned. Events can range from 16 to over 100 car brackets. Drivers are typically seeded by elapsed times in qualifying. In bracket racing without a breakout (such as NHRA Competition Eliminator), pairings are based on times compared to their index (faster than index for class is better). In bracket racing with a breakout (Stock, Super Stock, but also the NHRA's Super classes), the closest to the index is favorable.
A popular alternative to the standard eliminations format is the Chicago Style format (also called the Three Round format in Australia), named for the US 30 Dragstrip near Merrillville, Indiana where a midweek meet featured this format. All entered cars participate in one qualifying round, and then are paired for the elimination round. The two fastest times among winners from this round participate in the championship round. Depending on the organization, the next two fastest times may play for third, then fifth, and so forth, in consolation rounds. Currently, the National Drag Racing Championship in Australia uses the format for major categories.
Distances The standard distance of a drag race is 1,320 feet, 402 m, or 1/4 mile (±0.2% FIA & NHRA rules). However, due to safety concerns, certain sanctioning bodies (notably the NHRA for its Top Fuel and Funny Car classes) have shortened races to 1,000 feet. Some drag strips are even shorter and run 660 feet, 201 m, or 1/8 mile. The 1,000 foot distance is now also popular with bracket racing, especially in meets where there are 1/8 mile cars and 1/4 mile cars racing together, and is used by the revived American Drag Racing League for its primary classes (not Jr Dragster). Some organizations that deal with Pro Modified and large capacity "Mountain Motor" Pro Stock cars (Professional Drag Racers Association) use the 1/8 mile distance, even if the tracks are 1/4 mile tracks.
Racing organizations
North America The National Hot Rod Association (NHRA) oversees the majority of drag racing events in North America. The International Hot Rod Association (IHRA), one of the historic sanctioning bodies in drag racing, acquired the World Drag Racing Alliance (WDRA), and now represents 117 member tracks across the United States, Canada, Aruba, Australia and New Zealand.
Besides NHRA, IHRA, and WDRA, there are several other racing organizations were created over the past several decades. The Professional Drag Racers Association (PDRA), founded in 2014, races 1/8 mile with events throughout the US. The National Mustang Racers Association (NMRA), started in 1999, is considered the leader in Ford motorsports events.What is NMRA? https://www.nmradigital.com/drag-racing/c15 The National Muscle Car Association (NMCA), is the longest running major street-legal drag racing association. The NMCA provides competitive and organized national event competitions from grassroots drag racers all the way to the powerful and fast VP Racing Fuels Xtreme Pro Mod racers.What is NMCA? https://www.nmcadigital.com/
There are also niche organizations for muscle cars and nostalgia vehicles. The Nostalgia Drag Racing League (NDRL) based in Brownsburg, IN, runs a series of 1/4 mile (402 m) drag races in the Midwest for 1979 and older nostalgic appearing cars, with four classes of competition running in an index system. Pro 7.0 and Pro 7.50 run heads up 200 mile per hour (320 kilometre per hour) passes, while Pro Comp and Pro Gas run 8.0 to 10.0 indices. NDRL competition vehicles typically include Front Engine Dragsters, Altereds, Funny Cars, early Pro Stock clones, Super Stocks and Gassers.
The National Electric Drag Racing Association (NEDRA) races electric vehicles against high performance gasoline-powered vehicles such as Dodge Vipers or classic muscle cars in 1/4 and 1/8 mile (402 m & 201 m) races. The current electric drag racing record is 6.940 seconds at 201.37 mph (324.0736 km/h) for a quarter mile (402 m). Another niche organization is the VWDRC which run a VW-only championship with vehicles running under 7 seconds.
Prior to the founding of the NHRA and IHRA, smaller organizations sanctioned drag racing in the early years, which included the competing AHRA in the United States and Canada from 1955 to 2005.
Australia
The first Australian Nationals event was run in 1965 at Riverside raceway, near Melbourne. The Australian National Drag Racing Association (ANDRA) was established in 1973, and today they claim they are the "best in the world outside the United States".Australian National Drag Racing Association ANDRA History ANDRA sanctions races throughout Australia and throughout the year at all levels, from Junior Dragster to Top Fuel.