03/04/2026
This Callaway HH V8 engine is a rare and ambitious twin-turbocharged racing engine developed by Callaway Cars in the late 1980s. Known for its expertise in forced induction systems, Callaway designed the HH V8 as a serious attempt to compete at the highest level of American open-wheel racing.
The engine featured a compact V8 configuration equipped with twin turbochargers, engineered to meet Indianapolis 500 regulations of the era. Built with lightweight materials and advanced turbocharging technology, the HH V8 was designed to deliver strong power output while maintaining durability over long-distance race conditions.
Despite extensive development work, the engine never officially competed in the Indy 500. Regulatory changes and competitive circumstances prevented it from reaching the starting grid, making it one of motorsport’s notable “what could have been” projects.
Even without race participation, the Callaway HH V8 stands as a testament to innovative engineering during a highly competitive period in racing history. It reflects Callaway’s commitment to pushing performance boundaries and exploring advanced turbocharged solutions in professional motorsport.