Due to recent repaving at Iowa Speedway and the introduction of heavier energy recovery systems adding 105 lbs, the NTT IndyCar Series has adjusted downforce levels for this weekend’s Hy-Vee doubleheader on the 0.875-mile oval. Tino Belli, IndyCar’s aerodynamic development director, explained that they are reducing rear wing levels to hole three out of six with a wicker, resulting in approximately 10% less downforce or about 450 lbs less. The wicker, previously optional, remains so for teams looking to further reduce downforce.
During last week’s Iowa test, IndyCar tested various downforce configurations and monitored electronic load sensors in suspension pushrods to gauge forces in high-speed corners. Based on data collected, reducing car loading by 450 lbs was deemed appropriate to maintain safe operating conditions without overloading the vehicles.
Belli noted that teams were informed during testing about potential changes and encouraged to experiment with the new wing setting to ensure readiness. Despite still having substantial downforce due to the use of road course front wings and most of the rear wing package, the 10% reduction in maximum downforce could lead to more lifting in corners, potentially extending tire life.
Moreover, Iowa marks IndyCar’s inaugural hybrid oval race, with a per-lap limit of 105 kilojoules for hybrid energy usage established ahead of the event. Teams reported during testing that the 105kJ limit provides about three seconds of 60 additional horsepower during laps that typically run around 17 seconds.