Back in 1972 a patent was entered were water injection was introduced to the carb, (pre-venturi), via a port. These were the days were OPEC began hitting us hard along with serious ecological issues entertained by Washington D.C., (early emissions standards).
Well it was never used by Detroit as far as I know. But the idea still stands. With the high prices of premium fuel, I'd like to use 87 octane but the knock rattle is killing me along with my engine. Water injection seems to be the cure for it.
The pdf docs I uploaded are the patents and write-up. Carbed Buicks, (turbo and N/A's), apply.
Quote:
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..A system for injecting water into the boost venturi of a carburetor for ultimate introduction into the combustion chambers of a gasoline type combustion engine. The water flow is metered through an orifice in the water supply conduit at a predetermined ratio to the fuel and is injected into the constricted passage of the boost venturi at a level corresponding to the level of fuel injection.
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