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POWRi (Performance Open Wheeled Racing, inc.) is a dirt track racing sanctioning body based in the United States, founded by promoter Kenny Brown. [1] [2]It organizes the POWRi National Midget Series, a midget car racing series rival to the USAC National Midget Series, as well as the POWRi West Midget Series and POWRi Outlaw Midget Series feeder series.
IMCA Latemodel – full-bodied late model race cars; IMCA RaceSaver Sprint Car – traditional 305 non-winged and winged sprint cars; IMCA Stock Car – full-bodied production stock cars; IMCA Hobby Stock – 8-cylinder rear wheel drive entry-level division; IMCA Northern Sport Modified – same as modifieds but with smaller engines and more ...
The first weekly races were held at the Knoxville Raceway in 1954. After internal issues with the sanctioning body—the Southern Iowa Stock Car Racing Association—in 1956, Marion Robinson of Des Moines, Iowa was appointed as race promoter. During Robinson's tenure, the cars progressed from stock cars to modifieds to supermodifieds to sprint ...
Regular events include 410 cubic inch sprint cars, 305 cubic inch sprint cars, and dirt trucks. In 2024, the World of Outlaws sprint car series returns to the speedway for the first time since 2016. The speedway has previously hosted the All Star Circuit of Champions, National Sprint Tour, and United States Auto Club.
Sprint cars are open-wheel race cars, designed primarily for the purpose of running on short oval, circular dirt or paved tracks. Historically known simply as "big cars," distinguishing them from "midget cars," sprint car racing is popular primarily in the United States and Canada, as well as in Australia, New Zealand, and South Africa.
Sprint Cars are powered by a naturally-aspirated, methanol-injected overhead valve V-8 engines; with a displacement of 410 cubic inches (6.7L) and capable of engine speeds approaching 9000 rpm. [3] A lower-budget and very popular class of sprint cars uses 360-cubic-inch (5.9L) engines that produce approximately 700 horsepower (520 kW). [4] [5 ...
The number of sprint races were doubled to six, while Saturday was designed ‘sprint day’ - with a new “sprint shootout” qualifying session determining the grid for the sprint race.
However, certain engine sizes were common, and could be considered the "standard" Offenhauser engines: [7] 97 cu in (1.59 L) - to meet the displacement rule in many midget series; 220 cu in (3.6 L) - displacement rule in AAA (later USAC) sprint cars; 270 cu in (4.4 L) - displacement rule for the Indianapolis 500 under AAA rules [11]