Drag car brake/proportioning question

I built my system with Wilwood 4 wheel manual disc with a distribution valve & no proportioning valve. The car weighs 2500 lbs with me in it, 2 batteries & 5 gallons of fuel. Weight bias at 50/50, brakes slow the car like a champ. There is an 1/8th mile track close to me with a very short shutdown area, I can make the middle turn out with no problems.