[Racer Boy]

If your front tires are overheating, it's probably because your car is understeering. Too much front brake bias shows up as the fronts locking up before the rears, not overheated front tires.

Trying more rear bias to get the car to rotate will likely introduce all sorts of unexpected consequences. If you want the rear to have less grip to "rotate" the car, there are a lot of better ways to address that than messing with the brake bias. Try a stiffer roll bar, or stiffer springs. Better yet, increase front grip with a softer front bar or springs. You can also try different alignment settings.

In my experience, screwing with something that isn't causing problems (like brake bias) to try and change other behaviors in a car breaks some of the fundamental rules of proper car preparation. If your brakes aren't giving you problems, then don't mess with 'em! Your brakes are the single most important system on your car. Believe me, dealing with handling issues is easier than dealing with braking issues!