Early Flathead Ford McCulloch Supercharger
The most common originally available aftermarket flathead superchargers were manufactured by McCulloch Engineering Company. Many of these units found their way into vehicles designed for heavy duty applications, such as dump trucks, delivery trucks and tractor-trailers. These uses were referred to as high-power applications.
The other big sales application was of course for Ford flathead V8 engine automobiles. These cars were called Hot Rods and the driving force was more speed. Period advertising promised a 38% horsepower increase, better gasoline mileage, and longer engine life. Although the earliest McCullochs were not as dependable as users expected, the company soon got past that problem by introducing oil lubrication of the drive gear by motor oil. With internal lubrication dependability was no problem.
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