Another little ‘trick’ is to use the heater tubes in the chassis.
If you still maintain your behind-dash fresh air system, you can simply temporarily re-configure the controls
and blow fresh air from the cowl to the rear brakes (assuming you are using headers).
With heat exchangers in place, you must make a “U-duct” to direct the heat exchanger waste air (very hot).
These ducts MUST have a restrictor in place so too much air isn’t allowed to ‘waste’ through the heat exchanger.
Make the tube extend down and back.
Even with the heat exchangers and ‘flapper valves’ in place, it is useful to use some
red (high-temp) heater hose to duct the output of the ‘flapper valve’ down and back.
Someone makes a part for the front brakes that seal to the rotor’s center vanes. All you
need is blow the cool air in that direction, including the caliper and pipe.
Why do BBS brake wheel-fans need to be sooo
expensive.
They really work.
‘Before BBS’, racers used modified Corvair engine fans.
Best,
Grady