Nitromethane (both types) are classed as one of the four Nitroparaffins. It's also the one with the free oxygen molecule. But VP neither discloses whether it's a particular Nitroparaffin or what percentage it puts in either M3 or M5.
I'm going to suppose that it's first of all, VP's proprietary information and second, that it is Nitromethane, because Nitromethane mixes so easily with alcohol, without the need for a third stabilizer or catalyzing agent or chemical. And with less than 20% nitromethane, jetting doesn't change much, so with a 5% plus compound, you'd be stabilizing the octane of the methanol, adding energy because of the additional heat and thus adding HP and torque to the total output.
According to Dow Chemical's Tech Sheets, the Nitromethane addition also inhibits metal and Neoprene corrosion caused by Raw Petrochemical based Methanol, which we see when we use raw, pure Methanol. Currently we mix a small amount of "upper Lube" with our methanol to assist in inhibiting that particular problem(s).
I was curious as to how many of you guys had used it and what you thought of the bottom line. Was the cost and the time involved with using it worth the results? As well as any mechanical malfunctions caused by it's usage . . ?