Thanks Slides. Reading through this thread that was the #1 point on my mind the whole way through.
Water in water may flow the same as air in air, but water in air does NOT flow the same as air in air.
Correct me if I am wrong, but if it is primarily the temperature reduction of the intake charge that is sought, and evaporation is attained in large part, then we are talking about water vapor vs air. Those two have much closer densities and flow together much better than water droplets in air. Rain falls, clouds float.
If that isn't the goal of it all, then why not just run a high pressure steam system for your injection. No pump necessary, just a boiler. (joking)