I forget who it is that asked me so I will post it here. NOS is not a flamibale gas, it doesnt explode and you dont have to worry about that. What it does is, cools raw fuel to a lower fuel temperature. Gas will combust with more energy the lower its temperature is. There are alot of ways to use nos and freeze your gas more efficently but out of all a fogger system by far is the best. As your gas atomizes from the injector, atomized NOS freezes every particle of gas and giving you a powerful combustion. wet systems you have raw gas in the intake and nos only freezes the outer parts of the gas for an uneven freeze. You ever wonder why on cold days your car runs better then on hot. This is why. Back in the day before nos people would make cold boxes. They would coil copper fuel lines in a foam or plastic cooler and fill it with dry ice. The carbs bowl would have "snow"on it , frozen condensation, when you ran it. This would, they say, cool the gas before it hit the carb and they would get more hp in return.