[naz]

darkpuppet,Oct 18 2007, 08:56 PM Wrote:Many advance traction control programs and active yaw control (or ESP) systems operate on the known parameters of things such as break torque of the wheels, engine output (load/torque/whatever0 at given throttle percentages, etc.

If you add a boatload of HP, or even change the brake balance a significant amount, AYC and TC can begin either overcompensating or undercompensating...
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if we are taking about a US market EVO 8 or EVO 9 they didn't come with AYC.. just a center diff that varies torque split f/r dynamically in the evo9 and evo8 mr (non mr evo8 just had a center diff without computer controlled clutches)

the goal of AYC (and DCCD in the STi and the center diff in the EVO 8 and 9 ) is changing torque split via clutches in the center diff not keeping the car or wheels from spinning by reducing engine output or braking individual wheels.. that's why the amount of power doesnt matter (believe me if these trick center diffs hurt modding the entire awd/turbo community would be in a huge uproar)

the systems will just keep splitting the torque.. there is no braking or engine output reduction happening anywhere as a result of the center diff systems.. so there is no over/under braking or engine output loss issues that arise from having the computer controlled AWD fairies in your center diff

further reading:
http://en.wikipedia.org/wiki/Active_Yaw_Control
http://www.driveperformance.subaru.com/ver...2/blueprint.asp