Hi,

I haven't seen the AMA article, so I can't comment on that. But I do know a little about water injection. The water, or water/alcohol injection, was first used I believe, on the World War Two fighters. It is used to combat detonation in engines with high compression ratios and/or being run with a gasoline of lesser quality octane rating than needed. You are right, it was offered and used for car engines for a time as well. The older cars were designed with higher compression ratios, and when the fuel quality started declining in the beginning of the "smog years", the water injection systems would sometimes help the situation.

Detonation is generally more of a problem in, as I said, high compression engines, and also in engines with large bores. Our little weedie engines have both small bores, and low compression ratios, so detonation is not a problem, even with today's crappy gasoline. Water &/or water/alcohol injection would probably be a waste of time and gain nothing. One interesting side note however, is that the engines run with the injection showed remarkably clean combustion chambers and piston tops, with virtually no carbon build up.

Hey aero nut, any luck with your tests yet????

Hope this helps,
AV8TOR