If you find the brakes lock up with only a little pressure lower your brake balance, it's different for each car so I usually drive the car first then adjust the brake balance so I can use more of the travel of the pedal.
If you want to know what the brake bias is on a normal car because you want it to feel the same as your car in real life that wouldn't work very well because if you put say a 7/4 on an Ferrari F40 it would feel completely different than on a GTR. Each car is unique.