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Porsche 597 Engine

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It’s not commonly known, but Porsche built low-compression industrial engines in the ’50s. Though they are similar in design, they are much more robust and powerful than the VW engines in the same era. They were similar to the engines fitted to the 356A Porsche sports car but with a low 6.5:1 compression ratio, a single Solex two-barrel carb, and heavy-duty oil cooler. The engine was rated for about 20hp less than the sporty car engine but only about 6 lb-ft less torque. A Porsche industrial engine was fitted to the prototype of the M-422 Mighty-Mite used by the U.S. Marine Corps, the development of which was originally done by MARCO.