Quote:
Originally Posted by ayao
I do not fully understand the practical implications of what you've found in the 1M vs M3 NCSDummy comparison?
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We know that 1M is a parts bin car, mixing E82 135i with E92 M3. We also know that BMW has held back performance features from US market cars. I was just trying to show exactly what those differences are.
As an engineer, I work from the assumption that these parts are mostly the same, with some different firmware versions to properly interpret the settings. For example, M3 MK60 shows 8 possible values (wert_00-wert_07) for the oversteer friction coefficients, whereas 1M MK60 shows 2 possible values (wert_00-wert_01). Here is a breakdown:
US MUE_1_2
E93 M3: 3.5 m/s^2
E90 M3: 2.797 m/s^2
E92 M3: 2.203 m/s^2
E82 1M: 2.203 m/s^2
Non-US MUE_1_2
E93 M3: 2.594 m/s^2
E82 1M: 2.000 m/s^2
E92 M3: 1.703 m/s^2
E92 M3 GTS: 1.703 m/s^2
Now that I'm looking at it again, I don't see a listing for Euro E90 with S65B40, only with S65B44 (which should be GTS engine); so it might be that Euro 1M and Euro E90 M3 have same MDM settings.
I don't know the exact calculation, but, thinking about safety, I would assume that BMW would reduce customer's ability to drift in E93 where there is no roof to keep unbelted passengers in the car. My extrapolation being that the larger the MUE_1_2 value is, the sooner the ECU will intervene for you.