Quote:
Originally Posted by Radiation Joe
Many good points there. Remember, a brake set-up needs to consider a number of car specific parameters. You can't just slap on a particular size rotor, then mix and match calipers. Brake bias needs to be considered and that has to consider differing pressures from the master cylinder, swept area, rotor diameter and tire loading under braking. Many kits out there have failed to take this into consideration. Stoptech has always made it a point to try to balance the system. In your example above I would assume significantly smaller pistons would be provided for the rear calipers in order to maintain proper balance.
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Getting the brake balance right is a core competence at Stoptech - it's a big reason why I really like their products. The front and rear sets they already make for the new M3 are balanced to the stock brakes - you can replace either the front or the rear axle by itself without upsetting the overall brake balance of the car.
You're absolutely right that they'd have to engineer a front setup that was properly balanced based on the smaller rotor, but if anybody can get that right, they can!