In Reply to: Powerband posted by peter on August 12, 1999 at 17:38:10:
I have the same car ('99 540I6) with 7.5K miles. The only time I have seen the power loss you speak of was in a situation where the DSC cut in (I think - I didn't see the light go on). But it was just like someone had slammed on the brakes. This wasn't a dip in the torque curve but a complete (but momentary) shut down of the car. It was unexpected and a rude shock. I was accelerating out of the apex of a hairpin turn: thus I think the DSC interpreted the situation as "marginal" and took over. I expected to lose some traction in the way that I applied power coming out of the turn (but in a controlled fashion) but the DSC overrode my judgement.
I also recall another situation, under hard acceleration, this time in a gradual uphill turn when again it felt like someone had "pulled the plug". I chalked that one up to DSC as well. What are others experiences with DSC ?
It seems that when accelerating hard in curves where the "attitude" of the car just right, that the DSC simply shuts the car down to avoid a break loose situation. My understanding that DSC monitors front wheel angle and lateral acceleration to detect oversteer and understeer. Engine power is cut as well individual brakes being applied.
Do you see this loss of power every time ? What happens if you switch the DSC off ? Has the car always been this way or has it developed lately?
Obviously, interested in this topic, as I have the identical car.
'99 M3 conv.
'69 Lotus Elan S4 SE