I plan to try a mixture of 20% methanol, 75% gas, and 5% acetone.


This mixture may give you nothing but problems. I see a number of major obsticals you need to overcome to have an effective product: To put it simply; Glow carburation is designed to meter an alcohol/nitro/oil based fuel which must be considerably richer (almost twice as much glow fuel flow required, depending on nitro content and other variables). These little engines and carbs were not designed to run or meter gasoline based fuels and may not be able to make the air/fuel mixture ratio correct. As others point out, the glow plug will loose most of its ability (if it works at all) to ignite the mixture if enough methanol is not in the mix. Compression ratios differ from engines designed for gasoline or glow, with glow engines usually having a little higher compression. A great deal of your cooling is eliminated by running gasoline based fuel in a glow engine because methanol has a greater ability to absorbe heat (and you're using twice as much of it) than gasoline, therefore overheating may present a problem. Getting 20% methanol to stay mixed with gasoline may be tough, these two chemicals do not like to stay mixed in that high of concentration for very long. Running oil at 100:1 (1.28 oz of oil per gallon) or even 50:1 (2.56 oz of oil per gallon) in a glow engine without a caged needle bearing on the big end of the rod will result in disaster in very short order.

I am not trying to rain on anybodys parade and the above are what I consider your major obsticals. If you can make it work, please share your results.