United State: Tudor United SportsCar Championship Explained
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Prototype
Leading the way in the Prototype class are entries such as this Riley chassis with a Ford EcoBoost engine. There is direct factory involvement in this programme.
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Prototype Challenge
The second prototype class are all Oreca chassis powered by V8 Chevrolet, a spec class designed to promote close racing on a budget, a laudable aim.
GT Le Mans (GT LM)
So much for prototypes, there are also two GT classes, GT LM which are run to the same basic rules as the GTs that run at Le Mans and the FIA World Endurance Championship. Factory teams as well as privateers and in North America the GT racing class is considered by many to be the stars of the show. Local favourites are the Corvette team run by Pratt & Miller and for the Rolex they brought out a new car, the C7.R with a 5.5 litre V8 engine, a lighter, stiffer chassis, they were pre-race favourites for many observers.
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GT Daytona (GTD)
The final class was GTD, basically GT3 and other former GrandAm GTs and this is a pro-am class requiring at least one gentleman driver per car. So it was the usual suspects such as Ferrari on parade, this Russian 458 Italia being one of 8 on the grid. The GTD class also had to run Continental Tires, in common with the two Prototype categories, GT LM allowed a freedom of choice allowing manufacturers to run tyres that are best suited to their cars.
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