Design
The Hurricane is one of the few "F-Head" automobile engines, and the only one well known, apart from those produced by Rolls Royce and Rover. The "F" comes from having one set of valves in the block, like a flat (or "L") head, and one set in the head, like a modern OHV engine. The reason Willys did this was because they started from an existing L-head block and modified it to put the intake valves in a new, much taller head. This created a very compact combustion chamber and a higher compression ratio, boosting power.
When introduced in 1950, the F-134 with its 75 horsepower (56 kW; 76 PS) was the most powerful 4-cylinder engine mass-produced in America.
Read more about this topic: Willys Hurricane Engine
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