water would be alot more effecient than fans imo. you coul modify the existing mist/water injection systems used for SC/TC'd cars

 

what about using the existing pump for the windshield wiper fluid and just re routing the plumbing to each brake and maybe using nossels that made a finer spray pattern.. My only concern would be thermal shock.. could you crack a rotor by cooling it so quickly.. or am i smoking crack?

 

you should be able to make such a system automatic with integration of an IR temp sensor.

 

the problem I see is making sure you equally "wet" each side. you could just spray it into the vanes I guess.

I don't think you need a complex control circuit.

 

Drill a hole in the caliper and insert an injector which sprays water into the rotor vents. An IR sensor mounted on the caliper could activate the system when it shows temps above some threshhold. Of course the sensor and wiring and such would need to withstand those temps too and you'd have to keep the water from boiling inside the system. Injecting steam I don't think would help anything.

The water would in effect wick off some of the heat (it would evaporate long before ever making contact with the 800F rotor). You would get the effect of more mass without adding weight. How much and to what effect is anyones guess.

Not too practical but funny to talk about none the less.

 

You could always mount the sensor a fixed distance from the rotor instead of putting on the caliper. Then you can calculate the temperature at the rotor based on the distance. The intensity is proportional to 1/r^2, if I remember correctly...

 

We're getting a little off the subject of Dave's thread but since we're already going in that direction I'll keep pushing.

Isn't it possible that spraying cool water on a hot (how hot...400? 500? 600? more? degrees) piece of metal might cause warping/cracking? I'm pretty sure that's why you don't see water cooled braking systems on race cars. Oh, and I'm not sure you want to be spraying liquid around in the vicinity of your tires either

 

its should be mist and not enuf to "drip", and so long as you don't cool them too rapidly it shouldn't crack.

 

Point taken Rylan, but I can't help but think of the acronym KISS.

 

I completely agree. My point was just that water should be simpler and better than fans.

I'm not gonna be installing -either- on my car