NTT INDYCAR SERIES teams conducted tests at Iowa Speedway with hybrid power units and a newly repaved track surface ahead of the upcoming races. Teams had positive feedback on the smooth track surface and the functioning of the hybrid systems during the tests. The conservative approach by IndyCar in limiting power output aims to ensure a smooth transition to the new technology. Drivers anticipate differences in racing dynamics due to the track changes, with increased speeds recorded during testing. The tests provided valuable insights on energy recovery system usage and car handling for the upcoming race weekend at Iowa Speedway.