Finally have my private pilot license done and this week in Kansas will be the last one for some time, so I will have more time to put my ideas to work.
What I'm thinkng is getting back to original subject in this thread - see the first post: "running gas engine on the regular gas fuel with the glow plug". I mean no methanol at all. To remind everybody, who didn't read this whole thread, the only reason to mix methanol with gas is to keep glow plug hot during compression (catalytic reaction). The same effect we can achieve by running current through the glow plug (glow starter). However the problem is, that gasoline is burning so hot it overheats the glow plug's coil and break it (often after less than few hours of flying time).

So here is my new idea. To keep the glow hot all the time I'm going to use on-board glow starter. However most of known starters use just on-off switch based on the throttle position. I want the circuit that would regulate the temperature of the glow plug all the time (by measuring the resistance) keeping it at the desired level. This way I should be able to use much less power during the run and not overheat the glow plug at the same time. My previous experiments proved that the remperature can not be used for controling ignition timing (it is more like on-off), so the temperature range is not very critical. Just to keep enough temperature to have engine running but low enough to prolonge the life of the coil.