Re: Methanol
some of us V8 guys currently run full on stock long blocks with stock cast pistons. if we run out of meth or the meth injection fails or gets clogged some how the engine goes lean and pops.
If you run out of water/meth (your anti-detonant) at full boost, the motor won't last long, either.
If the mix is what's keeping it from pinging, and that mix goes away...
Water is by far the champ in terms of Latent Heat of Vaporization. (The amount of heat "absorbed" when a substance vaporizes) Methanol is second, but quite a bit behind, followed by other alcohols, and gasoline is sort of a tail-ender.
The downer to water is that it doesn't burn. There are people who claim that the water breaks down into Hydrogen and Oxygen, which is bunk. The energy needed to break apart a water molecule is much greater than what you find in normal combustion. So, you end up with a bit of steam in the combustion chamber, which isn't an entirely bad thing at low doses. The problem comes when you're injecting a lot of it, as many of the ultra-high boost guys are- you're basically putting out the fire.
Pure alcohol, on the other hand, just burns.