well, you would not want to spray THROUGH the IC obviously. Not only would you get condensation inside the IC, you would pull heat from the IC to the intake air. In our application, I would put the nozzle right after the IC to finish the job of the IC in cooling the air. Most of the misting coolers are meant to replace intercoolers. Typically you use a mix of alcohol and H2o to enhance the evaporation. Spraying water/alcohol though the intake also serve to reduce detonation and allow you to to run more timing & boost.