The flash point of a volatile liquid is not what you are looking for. As pointed out, at atmospheric pressure methanol will boil at roughly 147 degrees F. If you have methanol under pressure and the methanol is at a temperature above 147 degrees, but below the saturation temperature under pressure it will remain a liquid, but if exposed to atmospheric pressure it will flash instantly. The liquid will continue to flash until all of the liquid is gone, or enough energy has been transferred through the latent heat of evaporation to cool the liquid to the saturation temperature at atmospheric pressure. In order to start boiling off the methanol under your hood, your under the hood temp would have to remain at or above 147 degrees long enough to heat and boil off the meth. At 22 pounds of boost the saturation temperature of methanol is roughly 200 degrees. As pressure increases so does the saturation temperature and vice versa. So if the temperature of the air charge leaving your intercooler is below 200 degrees F, the methanol will remain a liquid even after it is injected into your intake. Injecting methanol before a blower, you will be injecting liquid, unless the methanol is under pressure and hot enough to vaporize or the intake of the blower is below the saturation pressure which I doubt but possible. It will likely vaporize after entering the blower through the heat of compression if running enough boost.