Also, the temperature of the air going into the engine is hot. You can run better and more expensive fuels, pull the timing back, and you will still get to a point where it still detonates, no matter how much fuel you put in. The problem is the heat. Some have used water injection and it will effectively raise the octane and lower the combustion temps. Problem is controlling the water injection.
Most methods just turn it on or off.
Also pumps, and solenoids are very expensive. We found that the Bosch fuel pumps, fuel pressure regulators, and injectors will tolerate methanol. I would not recommend leaving methanol in the system for more than a few days because methanol is corrosive and will chew on everything that is not stainless steel or compatible with it. The methanol does 3 things for us. First, it has BTU's.