and exactly how fast do you think you would get tech'd off of a track for dripping water all over the place? Sport Compact Car knows, because they tried to run a project WRX and they weren't allowed because the thing dripped water everywhere. If you are that worried, vent your hood or fab up some aluminum shield to block the intake away from the co2. Filling a nitrous bottle $60-80, filling a co2 bottle $5-10. i'll take the chance