With a forward brake bias of -5, the car was understeering into corners.
However, a rearward bias of +5 transformed the RCZ, making it turn much better.

Key Considerations for Brake Balance Adjustments:

MR (Mid-Engine Rear-Wheel Drive)

Theory: Because of the engine's location nearer to the middle point of the car, between the driver and the rear axle, the weight on MR cars is better distributed. This will transfer more weight to the front under braking, though not anywhere near as extreme as FR or FF.

Implication: A neutral to slightly front-biased brake setting helps stop the front tires, which take on more of the braking responsibility, as described above, from locking up too early.

FR (Front-Engine Rear-Wheel Drive)

Theory: In this type of car, most of the weight is in the front because of where the engine is placed. Under braking, even more of the weight shifts to the front, so lock-up of the front tires is definitely a concern.

Implication: The result of moving the brake bias slightly back is that the car uses more potential braking from its rear tire. This makes the braking forces more balanced and subsequently reduces the chances of either end locking up.

FF (Front Engine Front Wheel Drive)

Theory: FF cars have their engine and drivetrain at the front. This brings a notable weight concentration towards the front, and under braking, this effect is exaggerated, thus making the rear very light.

Implication: An excessive rearward brake bias would tend to bring the rear tires more into use during braking, lessening the tendency for understeer that is typical of FF cars.

4WD (Four-Wheel Drive)

Theory: This car sends the power to all of its four wheels and, of course, normally offers more grip with stability, particularly in challenging conditions. All these differ depending on the specific design and engineering of the car.

Implication: For 4WD cars, the brake balance can be kept slightly front-biased because in this way it can help in situations that need the maximum front-end grip. Conversely, on dry tracks where oversteer can be controlled or even desired for sharper turn-in, a rearward bias can be beneficial.

Mastering Brake Balance in Gran Turismo 7

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Mastering Brake Balance in Gran Turismo 7

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