Sprint cars have very high power-to-weight ratios, with weights of approximately 1,400 pounds (640kg) (including the driver)[2] and power outputs of over 900 horsepower (670kW),[3] which give them a power-to-weight ratio besting that of contemporary F1 cars.[4] Typically, they are powered by a naturally aspirated, methanol-injected overhead valve American V8 engine with a displacement of 410 cubic inches (6.7L) and capable of engine speeds of 9000 rpm.[2][5] Depending on the mechanical setup (engine, gearing, shocks, etc.) and the track layout, these cars can achieve speeds in excess of 160 miles per hour (260km/h).[2] A lower-budget and very popular class of sprint cars uses 360-cubic-inch (5.9L) engines that produce up to 775 horsepower. Sprint cars do not utilize a transmission but have an in-or-out gearbox and quick-change rear differentials for occasional gearing changes. As a result, they do not have electric starters (or even electrical systems other than a ignition magneto) and require a push to be started. The safety record of sprint car racing in recent years has been greatly improved by the use of roll cages, and especially on dirt tracks, wings, which increase surface traction, to protect the drivers.
There are several sanctioning bodies for wingless sprint cars. Once dominant United States Automobile Club (USAC) became USAC/California Racing Association (USAC/CRA) after taking over the Sprint Car Racing Association (SCRA). USAC/CRA remains popular on the West Coast, East Coast and in Indiana. However, lack of leadership in much of the US has resulted in a large number of groups and sanctioning bodies supporting wingless sprint cars.
Wingless sprint cars are considered the traditional sprint cars, dating back to the first sprint cars in the 1930s and 1940s (that ultimately evolved into Indy cars). Today, they are essentially the same car as a winged sprint car, only without wings. In fact, many of them have the "stub outs" in the frame for adding wings. They generally use the same 410 cubic inches (6,700cc) and 360 cubic inches (5,900cc) aluminum engines as their winged counterparts (although many local tracks have rules mandating steel blocks and some 305 cubic inches (5,000cc) displacements, this is mostly a cost control). Some newer regional groups, specifically POWRi and Elite have chosen to allow open engines with no limit to engine size. Their tuning and gearing are different for performance at lower RPMs than winged cars. Chassis set ups and tires are also different.
While they do not have the same top speed as a winged car (because they lack downforce for traction), they are thought by many to be more entertaining to watch. Their relative lack of grip creates different driving characteristics than their winged counterparts, causing them to be more difficult to control through the corners. This, and the lack of roll-over protection a wing provides, makes them more dangerous than winged cars and their crashes are known for their spectacular nature.
Winged sprint cars
World of Outlaws drivers make a four-abreast lap at the Knoxville Raceway
The world's first small-track winged race car was driven by Jim Cushman at the Columbus Motor Speedway (Ohio) in 1958. Cushman drove with his winged super-modified (wing created by Gene and Floyd Miller) in several races and even won with it, starting a new trend of winged cars in sprint and super-modified racing. By 1959, up to half of the field was racing with a wing at Columbus Motor Speedway.[6] In the early 1970s, many sprint car drivers began to put wings with sideboards on both the front and top of their cars. The added wings increase the downforce generated on the car, with the opposite direction of the sideboards helping to turn the car in the corners. The increased traction makes the car faster and easier to control.
The wing also affects safety. The added downforce lessens the likelihood of going airborne. When cars do go airborne, the wings contact the ground first and break off or crumple upon hitting the ground, lessening the impact on the driver and the car. For these reasons, winged cars are safer to drive. Often teams are able to replace the wing during the ensuing stoppage and are able to continue once the race resumes.
The Grand Annual Sprintcar Classic at Warrnambool is the largest sprint car meeting in the world; in the 2014–15 season, the 2015 Classic race outdrew the Knoxville Nationals in entries.
Until the early 2000s, sprint cars in Australia were restricted to 6200cc (372 cui) V8 engines as opposed to the 410 cui (6.7L) engines used in the United States and New Zealand. Brian Healey, the Sacramento-based Australian who owned Parramatta City Raceway, pushed for the change in 2003 to follow both nations to 410. Today, Australia follows the standard 410ci formula, and has both the 410 and 360 cui (5.9L) formulae. Both formulae have separate Australian Championship meetings.
Midget cars
Midget sprint car
Midget cars are smaller versions of a full size sprint car, normally non-wing only. Midgets date back to the 1930s as a very common form of sprint car racing, still very popular today and also sanctioned by USAC, POWRI, and others. They are powered by four-cylinder engines developing around 350 horsepower (260kW), but are only similar to their larger cousins in appearance.
Mini sprint
Mini sprint car
Mini sprints are similarly sized to midget cars, but have upright-style chassis and center-mounted, chain-driven four-cylinder motorcycle engines with displacements between 750 and 1200cc.
Micro sprints
Winged micro sprint
Micro sprints are small racecars that are smaller versions of full sprint cars. A starter class for striving sprint car enthusiasts. 250/270cc single-cylinder two-cycle and 600 cc are the most popular micro sprint classes. They run side-mounted 600cc motorcycle engines developing around 140hp and are chain driven. They have chassis and bodies styled like those of full-sized sprint cars or midgets. Micro sprints are generally run on small dirt tracks that are usually a fifth of a mile or less in size, though they sometimes run on larger tracks. They can be either raced with or without wings; the latter are sometimes called "micro midgets" or "600cc sprints". The general minimum weights for the cars to pass tech is 775lbs for winged and 725lbs for non-wing. Micro sprints are generally a cheaper alternative than racing mini sprints or midget sprints, but they can be as expensive as full-sized sprint cars.
Outlaw karts
Outlaw karts are go karts with roll cages and wings. They are some of the cheapest race cars that are very competitive, costing around $5,000. Most tracks are one sixth of a mile or less. Outlaw karts run side-mounted engines of various types. The beginner boxstock and boxstock divisions run pull start clone motors and are usually for the younger drivers first getting their start. The intermediate division run 250cc dirt bike engines with the drivers or teams having the choice of running a four-stroke or a two-stroke. At some tracks, the intermediate division has to run a harder compound of tire. The biggest division in outlaw karts is the open division. The opens can run 450cc four strokes, 500cc two strokes, or 550cc four-strokes. The 450cc and 500cc motors are the more popular options because the 550cc motors are not run at all tracks, and the tracks that do run them make the kart weigh extra. The weight range for the karts is 150lb to 500lb.
Outlaw kart
Sanctioning bodies
The NOS Energy DrinkWorld of Outlaws (WoO) is a division of 410ci (6.7L) winged sprint cars that run all over the United States and have a few events in Canada. The cars have 15-inch (380mm) wide right rear tires and 410 cubic inch engines with mechanical fuel injection. These sprint cars have no batteries or starters in them, necessitating push starts by a quad or truck. They also do not have flywheels, clutches or transmissions, but the direct drive systems can be engaged or disengaged from the cockpits. This is done both for weight reasons and tradition. Another tradition the WoO has pertaining their "A-main" (the last race of the event) is to have the cars line up four wide just before starting the race as a salute to fans in attendance, giving rise to the popular PA message "you want the best, now you have them four abreast".
The All Star Circuit of Champions (ASCoC) is an American motorsports sanctioning body of winged sprint car racing founded in 1970. The series sanctions 410ci sprint car races in Ohio, Indiana, Pennsylvania, Michigan, Illinois, Wisconsin, New York, and Florida. On average the series runs 40 races per year, starting February and ending in October each year.
The United States Automobile Club (USAC) National Sprint Car Championship is a division of wingless 410 cubic inch sprint cars that run throughout the United States on asphalt and dirt tracks. The USAC also sanctions regional 360ci wingless sprint car series: the USAC East Coast Sprint Cars, USAC Southwest Sprint Cars, and USAC West Coast Sprint Cars.
The United Racing Company (URC) is a division for winged sprint cars that run mainly in the northeastern part of the United States in Pennsylvania, New Jersey, and Delaware. The URC started in 1948 with 11 races in its season. It slowly progressed to 28 races. The URC uses a 360 cubic inch (5.9 L) engine which generates approximately 650 horsepower (480kW). They race with alcohol fuel and use mechanical fuel injection (MFI) to deliver it into the combustion chamber.
The American Sprint Car Series (ASCS) sanctions both winged and wingless sprint car racing within the United States. ASCS winged cars use a 360 cubic inch engine which lead to fans calling the cars "360s". The series was started by well-known racing promoter Emmett Hahn. The series national headquarters were located in Tulsa, Oklahoma for much of its history, but moved to Concord, North Carolina in 2024 following World Racing Group's purchase of the series. The all-time leader in wins for the series is Texan Gary Wright with 127 A main victories under his belt.[7] Engine rules for the non-wing cars vary by series with some having unlimited displacement engines.
The International Motor Contest Association (IMCA) was organized in 1915, and is currently the oldest active auto racing sanctioning body in the United States. It sanctions traditional 305 non-winged and winged sprint cars under the IMCA RaceSaver Sprint Car class.
In Australia, sprint car racing is controlled by the Sprintcar Control Council of Australia (SCCA) who sanction the Australian Championships and the World Series Sprintcar series as well as the various state championships and other meetings held around the country.
Despite over 50 years of sprint car racing, the category has only ever held one unofficial "world championship". This was in 1987 at the ⅓ mile (586 metres (641yd)) Claremont Speedway in Perth, Western Australia. The event attracted a collection of drivers from Australia, NZ, Canada, and South Africa, as well as several World of Outlaws drivers. Australian veteran Garry Rush from Sydney, a 10-time winner of the Australian Sprintcar Championship, was the winner.
Television coverage
United States
Wingless cars were televised first when USAC had an ESPN television contract. The first national live television deal with winged sprint cars came on The Nashville Network (TNN) in 1992–93 and again in 1993–94 with a winter-based series in Arizona, which featured Mike Joy calling the action. Live coverage of the Knoxville Nationals on The Nashville Network began in 1995. A year later, a next-day tape deal with CBS for one race at Eldora Speedway aired while TNN coverage expanded. By 2000, CBS (which owned TNN at the time) announced TNN would air 15 live events, including the King's Royal at Eldora Speedway and the Knoxville Nationals. By the 2001 season, plans were to cover 18 live races, but midway through the season MTV Networks closed the CBS motorsports operations. This move relegated the remainder of the World of Outlaws season to tape delay races. A tape delayed deal with Speed Channel followed for the next season. Television coverage began on the Outdoor Channel in 2003. Events are usually tape delayed for two weeks or more. The Knoxville Nationals were on Speed Channel. The 2004 Knoxville Nationals did not air as bad weather postponed the event, and there was not enough space for Speed to air the event, won by Kraig Kinser. In 2003, Johnson sold his organization to DIRT Motorsports. Because of complaints about DIRT Motorsports and the lack of television coverage, Northwest Sprint Tour owner Fred Brownfield formed the National Sprint Tour as a rival to the World of Outlaws Sprint for the 2006 season. Notable teams in the NST included Steve Kinser Racing (No. 11), Roth Motorsports (sometimes known as the "Beef Packers" team) (No. 83), Tony Stewart Racing (No. 20). After Brownfield Promotions' owner Fred Brownfield was killed in a crash, Kinser and principals of two other teams purchased the entire Brownfield promotion. That series folded after the 2006 season, while the Northwest tour, a regional tour, was sold. The SuperClean Summer of Money aired on ESPN2 starting in mid June 2008 with the World of Outlaws at Knoxville Raceway and for eight weeks straight leading up to the Knoxville Nationals which were live on Speed. In 2015, the World of Outlaws had several races broadcast on CBS Sports Network. Knoxville Raceway has their weekly series as well as World of Outlaws and National Sprint League events on MavTV. USAC currently has some races televised on MavTV, primarily through Jack Slash Media's Dirty 30 highlights program. Other series such as the Lucas Oil ASCS Sprint Car Series, King of the West Sprint Cars, King of the Wing Pavement Sprint Cars, and several weekly regional series on MavTV.
Safety in sprint car racing has continuously evolved over the years as the cars have gotten faster and teams look to garner any advantage with weight and horsepower. While many regulations are centered around the class or division, each sanctioning body typically has a section in its rulebook dedicated to safety. These can vary between sanctioning bodies, and many even set safety standards for those hosting an event.
Some of the most common safety requirements placed on the teams are: an emergency shut-off switch, a quick-detach steering wheel, aluminum seats with high impact head rests with shock absorbing materials, fire resistant suits, underwear, shoes, and gloves, a full face helmet meeting that meets or exceeds a specified Snell or SFI rating, safety harness (most common is a 5-point harness) that meets a specified SFI rating, a neck restraint that meets a given safety rating, and at any time the car and equipment may be subject to inspection. The various SFI and Snell ratings may differ between sanctioning bodies, and many rule books include additional safety recommendations to be used at team or driver discretion.[8][9][10]
As for those hosting an event the sanctioning body will often place mandatory safety requirements on the facility including guard rails, retaining walls, concrete walls, and electronic caution lights. It is also typically the facility's responsibility of having an ambulance on site that meets DOT standards, fire equipment and staff, properly licensed medical staff and equipment, track communications, and safety equipment such as tow trucks. It is common for a facility to be visited prior to an event for inspection and updates be made prior to the event taking place.
The United States Auto Club (USAC) is one of the sanctioning bodies of auto racing in the United States. From 1956 to 1979, USAC sanctioned the United States National Championship, and from 1956 to 1997 the organization sanctioned the Indianapolis 500. USAC serves as the sanctioning body for a number of racing series, including the Silver Crown Series, National Sprint Cars, National Midgets, Speed2 Midget Series, .25 Midget Series, Stadium Super Trucks, and Pirelli World Challenge. Seven-time USAC champion Levi Jones is USAC's Competition Director.
Dirt track racing is a form of motorsport held on clay or dirt surfaced banked oval race tracks. Dirt track racing started in the United States before World War I and became widespread during the 1920s and 1930s using both automobiles and motorcycles, often running on horse racing tracks. There are a myriad of types of race cars used, from open wheel Sprint cars and Modifieds to stock cars. While open wheel race cars are purpose-built racing vehicles, stock cars can be either purpose-built race cars or street vehicles that have been modified to varying degrees. There are hundreds of local and regional racetracks throughout the United States. The sport is also popular in Australia, New Zealand, Canada, South Africa and the United Kingdom.
Avalon Raceway is a dirt track racing venue located in Lara, Victoria, Australia. The track is based on a clay sand mix, is oval shaped and is 390 metres in length.
Eldora Speedway is a 0.5 mi (804.672 m) high-banked clay dirt oval. Located north of Rossburg, Ohio in the village of New Weston, Ohio, its website claims capacity for 22,886 spectators in the permanent grandstand, and unlimited admittance for the grass hillside spectator area. The permanent grandstand and VIP suite seats make it the largest sports stadium in the Dayton, Ohio-region according to the Dayton Business Journal.
World of Outlaws Sprint Car Series, originally known as the World of Outlaws is an American national touring dirt track racing series. It is owned and operated by World Racing Group, and was rebranded when the World of Outlaws Late Model Series was introduced. The Sprint Car Series has been sponsored by Monster Beverage's NOS Energy Drink since 2019.
Jack Hewitt, is an American former professional dirt track racing driver. He is a two-time USAC Silver Crown Series champion and an All Star Circuit of Champions champion.
Bryan Timothy Clauson was an American professional auto racing driver, best known for his achievements in dirt track open-wheel racing, such as USAC Silver Crown, Midget and Sprint cars. Clauson was increasingly seen competing with the World of Outlaws (WoO) sprint cars in his last couple of years. Clauson also competed in the NASCAR Nationwide Series, Indy Lights, and IndyCar Series and was a development driver for Chip Ganassi Racing.
Williams Grove Speedway is a half-mile dirt racing track located in Mechanicsburg, Pennsylvania, United States. The speedway opened on May 21, 1939, it has been owned by the Hughes family for over 50 years and has hosted many of the most notable national touring series and some of those most prestigious races in the country. The speedway is entering its 81st year of operation, with racing every Friday from March to October and other special events. One of these special events is the $75,000 to win National Open for sprint cars sanctioned by the World of Outlaws racing series held in late September or early October each year.
Open sportsman racing is a form of automobile racing found mainly in southwest Victoria held on dirt track speedways of approximately one quarter-mile in length.
Macon Speedway, located in Macon, Illinois is one of Illinois's premier dirt ovals. It is also one of the longest continuously-operating racetracks in the state.
Brady Bacon is an American racecar driver. Nicknamed 'Macho Man', he currently drives in the USAC Sprint Car Series. He won the 2014, 2016, and 2020 national championships. He previously had raced for Kasey Kahne and was a developmental driver for Chip Ganassi Racing.
Modified stock car racing, also known as modified racing and modified, is a type of auto racing that involves purpose-built cars simultaneously racing against each other on oval tracks. First established in the United States after World War II, this type of racing was early-on characterized by its participants' modification of passenger cars in pursuit of higher speeds, hence the name.
Joey Saldana, known as the "Brownsburg Bullet", is an American sprint car racing driver. He is the son of former sprint car and Indy car driver Joe Saldana.
The Australian Sprintcar Championship is a dirt track racing championship held each year to determine the Australian national champion for winged sprint car racing. The single championship meeting runs in either late January or early February and has been held each year since the Windsor RSL Speedway in Sydney hosted the first championship in 1963. After the first nine championship meetings were held in New South Wales, the Sprintcar Control Council of Australia (SCCA) now holds the meeting in a different state on a rotational basis, with 1972 seeing the first championship held outside of NSW at the Premier Speedway in Warrnambool, Victoria. The Australian Sprintcar Title is only open to Australian drivers and is run and sanctioned by the SCCA.
Dirt track racing is a type of auto racing performed on clay or dirt surfaced oval tracks in Australia. The seasons tend to be from September to April. There are a large number of tracks available Australia wide, with some of the most popular ones being Perth Motorplex, Bunbury Speedway, Speedway City, Premier Speedway Warrnambool and Sydney Speedway. The richest and best known Speedway series in Australia is the World Series Sprintcars. The series was conceived by Adelaide based sedan driver and promoter John Hughes in 1986 as an Australian version of the famous World of Outlaws (WoO) series run in the United States since 1978. The most recent season was the 2014–15 World Series Sprintcars season.
Kevin Swindell is an American former racing driver and entrepreneur, who has competed in USAC and NASCAR competition. He has won 77 races in various dirt racing series including the Chili Bowl Nationals. Swindell is the son of three time World of Outlaws Sprint Car champion Sammy Swindell. Swindell owns and operates Swindell Speedlab, a clothing brand as well as Victory Fuel, a brand of flavored water.
POWRi is a dirt track racing sanctioning body based in the United States, founded by promoter Kenny Brown.
Placerville Speedway is a 1/4 mile dirt track located in Placerville at the El Dorado County fairgrounds in the Sierra Nevada foothills of eastern California.
Sydney International Speedway, known as Sydney II as its successor to the original circuit, is a dirt track racing venue held near the shutdown area of Sydney Dragway in Eastern Creek. Like the original, it is about 500m in length.
Shane Mathew Golobic is an American professional dirt track racing driver. He competes in the World of Outlaws Sprint Car Series and United States Auto Club (USAC) National Midget Series for Matt Wood Racing. Prior to racing nationally, much of his dirt racing participation came in his home state of California, which included winning track championships and the California Sprint Car Civil War Series in 2014.
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