Front end popping/settling noise when car is parked

The front drops when you hit the brakes, so 1" drop in front, with 1/4" toe out each wheel, gives 1/2" toe out per inch of travel. I've gotten the car up to 156mph at Pacific Raceway's road course, so I'm hitting the brakes pretty hard before that U-turn. I had to be done braking by the time I wanted to turn. If I had to hit the brakes harder into the turn, it pulled into the turn hard, and pushed back out when I let off. The tires weren't sliding, the steering wheel wasn't pulling, and it all went away when I adjusted it to less than .010" per inch of travel.