Eliminating "nose dive" under braking is a product of correct shock absorber valving combined with proper brake balance. Stiffer springs and a lowered center of gravity help too. That being said, these improvements only make the car able to deal with the weight transfer that's occurring, without upsetting its balance and traction.
Here's an article on weight transfer and anti-dive suspensions, written by Terry Satchell, chassis specialist for Ford Motorsport:
http://www.circletrack.com/tec...arameters/index.html
It's impossible to eliminate weight transfer under braking. In fact, weight transfer also happens when you push down, or lift off of, the throttle, and it affects traction whenever it occurs. If you are lucky enough to attend any of the well known high performance driving schools (Bondurant, Jim Russell, Skip Barber, etc.), weight transfer is usually the first day's lesson.
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