Hey Jason, i might have a solution, " i know" from me...
Back when i was a boy, 18 or so, Gee they were the days.
I was with a gal who's mothers boyfriend was one of the Grafereo Brothers, from the Truck racing Grafereo's and that monstor 4 turbo, v 12, on nitros Bandag bullet, so ended up spending a bit of time with them at the track, mmm maybe thats why that relationship failed
.
Anyway, they had a problem of cooling down the drum truck brakes at the end of the straight, ready for the next corner, not much room either for a vent.... so.
They plumbed small brake lines to 2 points to each side, then filled a fire extinguisher with water, plumbed it to the two lines, pressurised the fire extinguisher, cause they have a tire valve filler point, set a opperation switch to a harder pressing point behind the brake, for only opperated at hard braking.
This system may work for you, as you will only really require it on track days, and you could vary the size of the tank, cause you wont need that much water.
A hint might be to add a little
oil with the water, for those elimination of close behind cars.
