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Old 02-14-2012, 06:46 PM   #15 (permalink)
mostly harmless
Join Date: Oct 2009
Location: Central AR
Posts: 77

Herman - '06 Chevrolet HHR 2LT
90 day: 28.89 mpg (US)
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I'm thinking (not making any claims here) that perhaps the best way to use water to increase efficiency is to try something I think was called a six-cycle engine. After the fuel powered four, another involves injecting water into the hot cylinder, which turns to steam and applies pressure to the piston.
There'd be some engineering involved, with timing for ignition and injection, you don't want to cool the engine too much with the water injection, so adjustments would have to be made there...
Still, a lot more believable to me than the HHO fad.
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