I'm not trying to nit-pick, but people like you are following the wrong leads to squeeze more power out of your cars. I spend six years in school studying this stuff and have two degree to back up the stuff that I say (humidity included). I'm not bs-ing or just pulling junk out of my butt. I'm telling the truth that the little free spinning A/C pully doesn't not rob a significant amount of power to even worry about.

When you start looking at this level of "power loss", you should be considering other things first, like completely gutting your interior, getting rid of the spare tire, and only running with 1-2 gallons of fuel in your tank.