[Richard L]

Just realise that hotrod has just reminded me that heat is absorbed during eveporation only. After evaporation - transfer of heat is by gas dilution only - very little cooling effect, it is similar to ducting the cold air from your air conditioner in front of the intercooler along side with the normal air.

I wonder why people don't just dump liquid CO2 or N2O onto the intercooler surface, similar to water spraying system - it has to be the best way forward?

I guess I have been mis-led in many forums when people said that extreme cooling resulted on injecting a -180C gas into the inlet tract. The final temperature has to be proportional to - the "specific heat" ratio and the "mass" ratio of the two gases.

Thank you Hotrod