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The roofs are very flat, and tilted to catch additional air. The front suspension is usually a coil-over setup, with a torsion-bar set-up for the rear suspension. They utilize full tube chassis, which to the untrained eye, looks like a sprint car chassis, but is much different in reality.
In the late 1970s the costs for the Late Model Sportsman cars became excessive, so the "Late Model Stock Car" was born. Within a few years changes began with the carburetor, and by the mid-1980s the stock front chassis was replaced with a racing clip, for safety and availability.
The modern BriSCA Formula 1 Stock Cars are a highly sophisticated purpose built race car with race-tuned V-8 engines developing 480 kW (650 bhp), quick change axles and gearboxes and biased and staggered chassis and braking set up for constant left turning. However large bumpers were mandatory with contact very much encouraged to remove opponents.
Dirt track racing is a form of motorsport held on clay or dirt surfaced banked oval racetracks. 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, spreading throughout Japan and often running on horse racing tracks.
The cars feature a purpose-built chassis design specifically for dirt late model racing. With many chassis builders within the sport, chassis design and components are always employing new innovation and technology. The cars are powered by aluminum-head V8 engines (usually ranging between 400c.i. & 430c.i.) that produce over 800 horsepower. [5]
The Stock (IMCA, DIRTcar) or Street Stock (NASCAR, CRA/ASA) or Pro Stock (DIRTcar Northeast) divisions characteristically have bigger engines that produce roughly 360 horsepower, yet still require an OEM passenger vehicle production block. The rules also allow for some changes to the suspension, including the addition of screw jacks.
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Superstocks (previously known as A Grade Stockcars) are a premier class of New Zealand Speedway (dirt track racing). Cars are of bespoke design with integral roll cages built to rules provided by Speedway New Zealand. Superstocks weigh 1,400 to 1,500 kilograms (220 to 240 st; 3,100 to 3,300 lb) and are usually powered with modified production ...