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Behold the Octa-Gane Model H-44, a water injector that
claimed to increase fuel mileage, eliminate detonation and overheating,
and allow the use of low-octane fuels in high-compression engines.
Suspiciously, a number of companies marketed it in the late 1940s and
early 1950s. Popular Science tested one of the J.C. Whitney Octa-Ganes in 1968 and reported a drop in fuel mileage and power when using it.
The "Patent Pending" cast into the cover of the Octa-Gane intrigued
us, so we went searching for the relevant patent. While patents for
water-injection systems for internal-combustion engines date back as far as 1917,
the systems rode two major waves of popularity. The first came during
World War II, with aircraft engineers trying to figure out ways to boost
power and range. Possibly drawing on what they learned during that
first wave, inventors then began applying the systems to automotive
engines in the late 1940s, right about the time Detroit started building
high-compression V-8 engines. Unsurprisingly, given the confluence of
aircraft engineering and automotive tinkering, many of those second-wave
patents originated in Southern California.
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