11-01-2013, 08:34 AM
Basically it sprays a fine mist of water and methanol into the intake air, since water has such a high specific heat, it absorbs a massive amount of heat from the air, the methanol goes through phase change to a gas, which also absorbs a massive quantity of heat... Also the methanol is a fuel, so helps with combustion... Even without long pulls, you can feel the difference when it comes on...