why would you want CO2 going into your engine???

Because its cold and your engine will run better with colder air getting blown in it

its not co2 ti is liquid o2 cold as hell to

So would you use it like a nitrous system, in little bursts, or run it all the time?

The Co2 doesn't go into the engine! It is encased in a chamber that when the air or fuel goes by it, it gets chilled! No actual Co2 enters the engine in any way! think of it as more of an intercooler than anything else guys.

The problem with alot of CO2 in your engine is that things tend not to burn when in high amounts of CO2 (ie: snuffing out a candle). Thanks for the info DeathRat.