Taking advantage of revised rules which encouraged a return to racing of regular automobile manufacturers and production-based vehicles, the Cummings Engine Company of Columbus, Indiana, fielded a diesel-powered car in the 1931 Indianapolis 500. Housed in a specially-built, shortened Duesenberg Type A chassis, the 360 cubic-inch, four-cylinder Cummins Diesel was able to complete the entire 500 miles without making a single pit stop, the first car to ever do so
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Clessie Cummins, the founder of Cummins Diesel Engines of Columbus, Indiana commissioned August Duesenberg to modify the Model A passenger car chassis to accommodate the 85 horsepower, 4-cylinder Cummins Model U marine engine.
The finished car weighed over 3,380 pounds and was the second heaviest on the grid, but it still managed a top speed of 96.871 mph.
In 1931, Chessie Cummins drove this car on Daytona Beach setting the record for a diesel-powered car of just over 100 mph.
Diesels had some advantages over their rivals, which were mostly fuel economy related. The diesel engine could go much farther on a single tank of gas. Another advantage that since less fuel was needed, it meant a reduction of overall weight.
https://www.conceptcarz.com/vehicle/z15198/duesenberg-cummins-diesel-indy-racer.aspx
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