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Dirt track racing

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Dirt track racing is a specialized form of motorsport. It takes place on oval tracks with surfaces made of dirt or clay.

DirtTrackRacingLateModels
DirtTrackRacingLateModels

This sport is defined by the unique way vehicles interact with the loose ground. Drivers must master the art of sliding through corners to maintain speed. The sport is a global phenomenon with deep roots in many nations. It is highly popular in the United States and Japan. It also has large following in Canada, Mexico, Argentina, Brazil, Chile, Australia, New Zealand, South Africa, and the United Kingdom.

Maintaining the racing surface is a complex, technical process. It is considered a learned craft that requires many hours of labor.

DirtTrackRacing
DirtTrackRacing

Most seasoned racers prefer a moist, properly prepared clay oval. To prepare a track, workers use specific machines like a grader and a cultivator. They also use two types of rollers and a watering truck. After an event, the rutted surface must be repaired. Workers grade the soil to restore the track's contours. They shovel soil into soft spots and tamp it down. Then, they use a rototiller to aerate the top 12 inches of soil. This helps water penetrate deeper so the track stays moist. To avoid mashing the aerated soil, water trucks use offset boom nozzles.

Race tracks vary significantly in size and composition depending on the region. In North America, nearly all tracks are ovals. Most are less than one mile in length. Common sizes include 1/10, 1/8, 1/5, 1/4, 3/8, and 1/2 mile increments. On longer tracks, cars reach speeds over 100 miles per hour. This increases the distance between cars and may reduce crashes. However, crashes on larger tracks can cause more damage or injury. In the United Kingdom, tracks are often on grass. These usually measure between 400 meters and 800 meters. Mainland Europe features even longer tracks made of grass, sand, or cinder.

VintageModifiedOpenWheelDirtCarsCropped
VintageModifiedOpenWheelDirtCarsCropped

Vehicles are organized into specific classes through strict rule books. These books define engine size, dimensions, and required equipment. This coordination allows drivers to compete at many different venues. There are three main categories of vehicles: open wheel, modified, and full-bodied. Open wheel cars have exposed wheels without fenders.

957bWoU
957bWoU

These include Sprint cars, Midgets, and Karts. Some open wheel cars, like winged sprint cars, use a top wing to create downforce. This helps the car handle high speeds. Popular chassis manufacturers for these cars include Eagle and Maxim.

Modified cars serve as a hybrid between open wheel and stock cars. In this class, the rear wheels are covered by fenders. However, the front wheels remain exposed.

BenjiLaCrosseSeymour2007
BenjiLaCrosseSeymour2007

This category is governed by various sanctioning bodies like the IMCA or USRA. Each body provides its own annual rule book and registration fees. Modified cars share the racing characteristics of stock cars but maintain an open-wheel feel at the front.

Full-bodied cars, often called stock cars, have fenders covering all four wheels. These range from modified production cars to custom-built machines. Modified production cars might start as street vehicles with only the interior and windshield removed. Higher divisions of these cars add roll cages and racing seats.

DirtTrackRacing
DirtTrackRacing

Other types include Street Stock cars, which can have changes to the frame and suspension. Pure Stock cars are very similar to factory models with minimal changes. There are also non-production cars, which are custom-built from the ground up for racing.

Late models represent the most sophisticated tier of full-bodied racing. These are non-production cars built with steel tube frame chassis and aluminum bodies.

FastrakLateModelSeptember2006
FastrakLateModelSeptember2006

They are heavy machines, weighing approximately 2,300 pounds. Their engines are based on V-8 power plants from Chevrolet, Chrysler, or Ford. These engines can exceed 9,000 rpm. Late models can reach speeds well over 100 miles per hour. Because they are so advanced, they are expensive to operate. A complete race-ready late model can cost around $70,000. Even just a new chassis can cost between $20,000 and $30,000. All drivers must use full roll cages and safety harnesses to stay protected during these high-speed events.

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File:DirtTrackRacingLateModels.jpg
DirtTrackRacingLateModels.jpg
File:DirtTrackRacing.JPG
DirtTrackRacing.JPG
File:957bWoU.jpg
957bWoU.jpg
File:BenjiLaCrosseSeymour2007.jpg
BenjiLaCrosseSeymour2007.jpg
File:FastrakLateModelSeptember2006.jpg
FastrakLateModelSeptember2006.jpg
File:VintageModifiedOpenWheelDirtCarsCropped.jpg
VintageModifiedOpenWheelDirtCarsCropped.jpg
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