The International Motor Contest Association (IMCA), organized in 1915, is the oldest active automobile racing sanctioning body in the United States. J. Alex Sloan, a native of Pittsburgh, Pa., was instrumental in establishing IMCA and ran more races than all other promoters in the United States combined, all under IMCA sanction. After Sloan's death in 1937, his son John continued the IMCA tradition. Under his leadership, IMCA continued to grow and held its first Late Model race on November 9, 1947 in Lubbock, TX. In the late 1970?s Keith Knaack introduced the IMCA Modified division. Few knew then that Keith's vision and innovation would result in the largest class of race cars in the country. 

In 1990, Kathy Root was named president of IMCA and in 1996 purchased IMCA from the Knaack family. Using the vision and innovation of Keith Knaack, IMCA is based on enforcing fair and consistent rules that promote affordability as the foundation of racing in America. Through the promotion of the "grass roots" weekly racer, IMCA has continued to see remarkable growth throughout the last decade. 

IMCA Modified car

Modified cars are a hybrid of open wheel cars and stock cars - this class of car has the racing characteristics of a stock with the rear wheels covered by fenders and the front wheels open. There are sanctioning bodies that control the rules for this class at most tracks. Each Sanctioning body has their own set of guidelines provided in an annual rule book and their own registration fees.

Stock cars

Stock cars are generally automobiles manufactured by the major automakers with certain modifications as allowed for each class.

These are stock cars custom built for racing, usually with welded tubular frames and custom built or purchased bodies.

The most popular type of dirt stock cars are late models. They are categorized depending on what track and series that is running. The racetrack dictates what type of late model is raced, but most fall in to one of three categories:

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World of Outlaws

During NASCAR Weekend, the dirt track hosts the annual World of Outlaws event. This is a 2-day evening event with a rotating feature car class on Wed. night, and the WoO on Thurs. night.

Who are the World of Outlaws?

The World of Outlaws are the premier sanctioning body for winged sprint car racing in the world, and are comprised of sprint car drivers from across the country and the world. The series was founded by the late Ted Johnson in 1978, giving winged sprint car racer's somewhere to compete with uniform rules and guaranteed purse money.

What is a sprint car?

Sprint cars are high-powered winged open-wheel race cars designed primarily for the purpose of running on short oval or circular dirt or paved tracks. They must weigh at least 1,375 pounds with the driver in the car. They have a high power-to-weight ratio, making speeds in excess of 140 miles per hour (230 km/h) possible on some tracks. 630 horsepower (470 kW) is commonplace for these machines and are fueled by methanol. The safety record of sprint car racing in recent years has been greatly improved by the use of roll cages to protect the drivers.

Why is there a wing on top of the car?

A large wing on top of the car with sideboards that face opposite directions help to produce a great amount of downforce to help keep the car planted on the track and turn in the corners. The wings also help to absorb energy in the case of the car getting airborne in an accident. Top wings became prominent in the early 1970's. Sprint cars also are equipped with nose wings.

Why are the cars pushed to start?

Sprint cars do not have starters in them, so a push truck is used to fire the engine, and get the car in-gear. A sprint car only has an in/out direct drive, no reverse gear.

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