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Originally Posted by skittleslegend
I just want to point out real quick that the braking systems on many modified cars are actually the weakest points, even WITH aftermarket kits. MANY modified cars can actually take longer to stop than with the stock system. Obviously, this is not the case with all cars, but I would think it has a lot to do with the increased rotational mass, but that's just a guess. This information actually came from Sport Compact Magazine's "The Truth About Mods" issue, where they talked to aftermarket brake manufacturers.
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If you read Stoptech's product literature, you'll see they are well aware about bias issues and design their systems to move bias TOWARD the rear by slightly decreasing front brake torque, despite the increased mechanical advantage of larger rotors. They do this via adjusting the piston sizes of their calipers to exert less force for the same brake line input. Their intent is to give the driver better feel and wear characteristics inherent in a multi-piston caliper with the increased thermal mass of the larger rotors, not to have front brakes so powerful they'll stand the car on its nose.
A few years back, Car and Driver tested front BBKs on a WRX and found that most actually offer a bit of improvement in stopping distance over even stock brakes with high friction pads and all offered better fade resistance. Stoptech was among the best and were the cheapest option.