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[QUOTE=greasemonkee;123571]I have to ask here, you seem to be suggesting that droplet sizes influence autoignition events. Is this anomaly a result of the lack of latent heat of evaporation due to excessive size or something on a chemical level that only a chemist would understand?

Also, would you agree that detonation frequently occurs at lower, non-audible levels even in most factory engines?[/QUOTE

Re: first question: Droplet size is = to volume of fuel per disbursement. Injector pulse by design will allow X # of fuel count based on fuels and densities presumably controlled by pump pressure. There is an ideal state for this liquid fuel and type of injector to measure the amount of fuel at X pulse rate with a particular displacement design. However there are inconsistencies based on fuel conditions and additives, ambient temperatures, atmospheric changes etc. Many who are watching fuel consumptions closely will note that fueling at certain stations provide less or more gains regardless of the season. All gasoline have additives of different types depending on time of season and their own methods of fuel conditioning. As to auto ignition, as stated before, chamber temperatures referencing latent heat are but a particular condition effecting the fuels ability to burn at X rate. Changing of state is expansion of course and our ECMs are to help control the anomalies of fuel, ambient and internal pressure changes and temperatures etc as you know. So yes to your second question. Gasoline fuels in this case are different and have inconsistencies from one station to another and one state to another. Some fill ups will have obvious changes to mileage as not so to others. Changes to controls as from OBD2 to our most recent control systems are always improving to maintain higher efficiencies both in power and economy and to compensate for anomalies. However it has always been the goal to maximize control thus effecting efficiency. Better design of engines and their components add to this efficiency.
My only comment in relation to your system and gains achieve would go back to the availability of programing or remapping the system with the appropriate components to meet the demands of the remapping. Having wider parameters of operation to meet the anomalies related will help to achieve vehicle operation at higher A/F ratios. I've run across only a few systems that can achieve this.
I have to add this note: A friend of mine worked on the Honda Indy team and they would make their own fuel blends. Out of curiosity he took home some to use in his wifes Acura to see how it would perform. Performance was only slightly better but the mileage gain was 3+ per gallon. ( I don't remember the exact number but it was over three) That's significant for only changing the fuel. He's an accomplished engineer and has good methods of testing for consistency and thus I believe his findings.