It's been shown that in boosted engines water injection cools and slows the combustion process enough to prevent destructive knock, thus allowing further increased boost. Has anyone tried using water injection on a high compression n/a? I see there are pistons available for D series hondas that offer 12.5:1 compression (stock on a natural gas powered civic). Normally, this would probably knock pretty bad even on 93 octane gasoline, but what about with water injection? The extra power from the compression would increase fuel economy (more power for the same fuel = less fuel.)
Anyone got a real high compression engine they want to try some lower octane gas in?
Dalez0r 
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