Pre-Race Notes: BITNILE.com Grand Prix of Portland The NTT INDYCAR® SERIES and INDY NXT by Firestone development series are in Oregon this weekend for the BITNILE.com Grand Prix of Portland. Race activities will take place on the 12-turn, 1.964-mile natural road course of Portland International Raceway. NTT INDYCAR SERIES Firestone is supplying approximately 1,500 race tires to NTT…