Another concern in the NASCAR garages is what if the car of tomorrow doesn't work.
The driver Jeff Burton, who tested the car recently, said: "My biggest concern with it is, obviously, what kind of racing are you putting on. You've got to have better racing. You got to have cars that we can do what we need to do with them. If we don't, the fans won't be there."
NASCAR officials say they are still experimenting and that researchers are years away from finding the right specifications for the midsize ovals.
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