Wait, I'm confused (no surprise there)..
Are you guys talking about a intake stream injection system, where the CO2 is injected into the intake, and therefore makes its way into the combustion chamber?
Or are you talking about using the CO2 to spray onto and cool down the IC, which by definition is OUTSIDE the intake stream...and just chills down the IC from the outside...
Alpine White/Coral Red/Gray Poplar Convertible Sport/Prem/Step/Comfort/Nav/Sirius
By the way people: USE YOUR F&*#ING TURN SIGNALS! Pass the word.