Jackson at the Indianapolis Motor Speedway in his Cummins Special in 1950. (IMS) Jimmy Jackson drove his #61 Cummins Diesel Special to a new diesel land speed record of 165.23 mph on the Bonneville Salt Flats in Utah on this day in 1950. Nicknamed the Green Hornet by Jackson, the car had a 401ci (6.6L) six-cylinder Cummins JBS 600 truck engine. It was outfitted with supercharger mounted in front of the engine that was coupled directly to the crankshaft. Jackson ran the same car in the 1950 Indianapolis 500, but was forced to drop out after 50 laps due to mechanical issues. Like diesel? Check out this story about the first diesel road trip.