Other than reduce throttle under rear wheel slip, what does the ASC in a '99 M3 coupe do? What type of limited slip differential does the car have? Just curious....
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i have a 99 as well.
on all e36 cars equipped with asc, there is a throttle body that sits before the actual throttle body. the asc throttle body cuts off the intake charge to the engine when the ecu detects wheel spin.
there is a writeup somewhere on how to remove this throttle body, to allow more air into the engine, since there is a slight hindering effect with the asc tb.
on the e46, e39, and later e38, they have a completeley different system, called DSC, which applies the brakes, along with cutting off power.
the lsd part of the 99 e36 is a 3.23 lsd. not sure of the lock ratio, somewhere around 25%, iirc. -
The '99 has ASC + T ( I think '96 -'99's have this). There are several components. Sensors detect wheel slip ( I believe the speed of all four wheels is monitored). When they do, the ASC throttle body reduces the torque to the wheels. If this is not sufficient, the traction control (+T) steps in by braking one wheel to bring them to the proper speed. Additionally there is a engine break torque requlator to ensure that the drag from the engine does not cause the wheels to backslip on slipery surfaces. The rear diff is a "posi-traction" style limited slip diff as well.Comment
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http://www.bmwworld.com/technology/asct.htm
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http://users.cybercity.dk/~bbo2530/Private/traction.htmComment
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