Competition begins at 10:15 a.m., with eliminations set for 1 p.m. Staff reports Irwindale Speedway’s NHRA Summit drag-racing series will begin Sunday. It will be the first of eight bracket races, which involve Super Pro, Sportsman and motorcycles. The top finishers in each category advance to November’s national finals at Pomona Raceway. 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set!