Listen to this article IndyCar was set to move to larger 2.4-liter twin-turbo V6s with hybrid units at the start of next season, and Chevrolet-Ilmor and Honda Performance Development have been working to that deadline. Engines were originally due to begin testing in the first quarter of this season, with hybrid units from Mahle, a company based in Stuttgart, Germany. However, IndyCar, after consulting with Honda and Chevrolet, has decided to push the next engine formula’s debut back to 2024. “We are pleased with the pace of the technical development of the 2.4-liter, twin-turbocharged V-6 hybrid as we prepare it for competition,” said IndyCar president Jay Frye. “We are very encouraged by the progress our team and our partners have made, …