nitromethane is not off limints to anyone, just go to a hobby shop and ask for it. model airplane fuel is available in blends up to 50% nitromethane and it should to be available in 99% pure form for the people who perfered to blend their own fuel. the down side is the quantities will be small and the price will be high unless a bulk supplier is available (think gas pump). a little bit of model fuel in the grass mower's gasoline used to make it cut like crazy when the grass was high