By Steve Wittich The lone 75-minute NTT INDYCAR SERIES practice session in preparation for the Chevrolet Dual In Detroit, Dual I, got underway at 5 pm, and it was still warm. The ambient temperature was 86F, and the track temperature was 120F. With tires limited to eight sets of Firestone Firehawk Primary Racing Tires (Blacks)…

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