I have two separate master cylinders with a balance bar ( sprint car style peddles )

Your rotors are dead cold in the burnout box and when you jump on them at the finish line . I think a lot of people notice the brakes getting better after four to five seconds after braking with regular brake pads . I took me a while to put those two and two together.

Throw the stock Willwood and Strange brake pads in the garbage and use the Poly-matrix pads from Willwood . The poly-matrix pads are aggressive and have superior cold braking qualities over the multi range stock pads .

This brake pad change alone will help your stopping power immensely.