Hysterical thread. If you floor your vehicle, depending on the road surface, you might expect some breaking loose of the rear wheels. BMW's stability control is set up to allow a slight amount of "play" before the system kicks in to modulate engine output and/or apply braking. I've chirped the tires on my 535i upon spirited acceleration even after a rolling start. How much fishtailing is the OP talking about? For a brief second or so, or continuing to actually slide back and forth? You've got a lot of torque there, be careful, LOL! Good thing you didn't go for the 550i!
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Last edited by markl53; 09-16-2012 at 08:32 PM.