I also disabled the emergency pre-pressurizing function and felt it made a big difference at the track in braking zones.
With the AP brake kit it makes a noticeable difference on the street too. Even at just 1/3 throttle and cruising at street speeds if you lift off the throttle abruptly the DSC would pre-pressurize enough to cause the AP brakes to clamp slightly causing a forward weight shift (felt like engine braking).
At the track I'd always have to get on the brakes a bit slower than preferred in this one zone where you start braking a bit before a crest that drops off, otherwise the front wheels would lock up as soon as the car got a bit light. After disabling the pre-pressurize function I no longer have that problem since the system isn't applying more force than what my foot is telling it to.
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