In the Trans-Am roadracing series, they use a water mister in the brake duct to reduce the temp of the air going to the brakes. I just replaced the front bumper and the intercooler sprayer nozzles aren't going to work with the new setup. Since the HP gain from the sprayer wasn't really huge, I was thinking of putting the misters in the brake ducts I've got, or even putting the sprayers in the wheel well liner spraying the caliper/rotor area. Any thoughts to this? I figure if Trans-Am uses them, it should work for an Evo as well.

 

in theory, it sounds like it'll work but i wouldn't do just for the fact that water hitting VERY hot discs will just warp em... sure you're spraying just a mist into the ducting but traveling through it'll eventually "pool" up and hit the rotors, plus the types of corrosion that water can cause to some very important suspension/brake hardware... im an aviation structural mech. in th navy and personally id advise against it.. but like most people say, its your car so do what you wish...

the cold air should be sufficient enough to cool yoru brakes... no need for water

 

Good idea, but your not the first.
http://www.opentracking.com/water_cooling_brakes.htm
Personally I don't think our IC sprayer is up for the task. You're going to need a lot more PSI than the pump can provide to be able to create an effective flow (and fine) mist. Trans-am was exactly what I was thinking when you mentioned it.

helitech,
Dunking a 1000F+ glowing rotor into a tub of water may damage it, but a mist would merely vaporize before it even touched the rotor. This would be doing nothing more than cooling the air around the rotor. Keep in mind that I would encourage a very fine mist and nothing even remotely resembling a "stream" of water.