what kind of cars race in the indy 500
Indianapolis 500 Traditionally, the field consists of 33 starters, aligned in a starting grid of eleven rows of three cars apiece. The event is contested by "Indy cars", a formula of professional-level, single-seat, open cockpit, open-wheel, purpose-built race cars. As of 2015, all entrants utilize 2.2 L V6, twin-turbocharged engines, tuned to produce a range of 550–700 horsepower (410–520 kW). Chevrolet and Honda are the current engine manufacturers involved in the sport. Firestone, which has a deep history in the sport, dating back to the first 500, is the exclusive tire provider.