Originally Posted by EBMCS03' post='231621' date='Jan 29 2006, 07:00 PM

Wow since it learns like this... I wonder what'll happen when you dont drive it hard for a week... you'll get a slow car again... Sheesh I bet my car is like 0 to 60 in 8 secs by now!

Originally Posted by Znod' post='231406' date='Jan 29 2006, 11:35 AM

Here is today's update from 3:30 a.m. at 42 degrees. I added tests 3 and 4 to the post 20.01.00 data. The car was a bit slower today, but not noticeably so. I have, as yesterday, some wheel spin back--to the point where I abort some runs. I aborted one run today. The differences on the "zero tos" (e.g., for zero to sixty and the 1/8) are not large, but they still are troubling since I have been testing in slightly cooler weather. Time will tell whether the effects on 20.01.00 will go away completely. Maybe I'll have news from the foreman/engineer by tomorrow or Tuesday.

Looking at differences in the changes ("old" less "new")

70-80 0.129
60-70 -0.034
50-60 -0.068
40-50 -0.020
30-40 -0.046
20-30 -0.002
10-20 -0.030
0-10 0.009

reveals that the major differences favoring the "old" car (i.e., the negative differences) occur between 10 and 20 MPH, 30 and 40 MPH, 50 and 60 MPH, and 60 to 70 MPH. The second and last of these changes occur over speeds at which the Step shifts. So, is worse Step shifting part of the problem?

On the other hand, the most significant difference occurs between 50 and 60 MPH. In this regard, I wonder if the Step is shifting earlier than it should. Without getting into the calculations, the pertinent data are as follows:

Top speed in 1st gear would be 6,350 / 6,500(34.28769707) = 33.49644252
Top speed in 2nd gear would be (6,350 / 6,500)61.10243456 = 59.69237838
Top speed in 3rd gear would be (6,350 / 6,500)94.06559005 = 91.89484566
Top speed in 4th gear would be (6,350 /6,500)125.42078674 = 122.52646089

So, if the Step shifts from second to third at 6,350 RPM, then it would be shifting prior to 60 MPH which would produce an unusual 50 to 60 MPH difference.

Finally, I think that the large positive difference (.129) for 70 to 80 MPG is interesting. If it weren't for this difference the "two" cars would not be nearly so close in the 1/8th and to 80 MPG. I can't explain what is happening here, but similar differences occur across all 4 post 20.01.00 tests. Did the effects of DSC and DTC finally go away after 70 MPH? If these values are to be believed, the new car is very competitive with the old car in getting to 80 MPG.

Any thoughts anyone?

Originally Posted by grogan545' post='231691' date='Jan 29 2006, 09:49 PM

Hi Znod
Been examining your data and I think you are on the right track about the shifting situation.If you compare data from 0-10,0-20,and 0-30 you see there is very little diff between 19.01 & 20.01.But you are slower by .1 at 0-40.I believe this is due to a slower and sloppier shift to M2.You maintain the .1 slower from 0-40 and 0-50.The 0-60 time is more than .2 slower than with 19-01.Maybe your shift to M3 is right at 60mph and is slower and sloppier than previously thereby causing more lost time.Once in M3 you are no longer losing time versus 19.01.The cooler weather could be helping your 0-80 times(more horsepower).

Even though you had trouble spinning your tires I don't think the DCS/DTS situation is the problem.It appears you are losing most of the time dff during shifting.

Originally Posted by Znod' post='231693

Hi Znod
Been examining your data and I think you are on the right track about the shifting situation.If you compare data from 0-10,0-20,and 0-30 you see there is very little diff between 19.01 & 20.01.But you are slower by .1 at 0-40.I believe this is due to a slower and sloppier shift to M2.You maintain the .1 slower from 0-40 and 0-50.The 0-60 time is more than .2 slower than with 19-01.Maybe your shift to M3 is right at 60mph and is slower and sloppier than previously thereby causing more lost time.Once in M3 you are no longer losing time versus 19.01.The cooler weather could be helping your 0-80 times(more horsepower).

Even though you had trouble spinning your tires I don't think the DCS/DTS situation is the problem.It appears you are losing most of the time dff during shifting.

Originally Posted by Don Juan' post='232109' date='Jan 30 2006, 02:01 PM

SHOOT! I have a BMW service appointment tomorrow morning for an SIB (service bulletin) for rough start in the mornings[b] what to do ? I can live without the upgrade because i have lived without it since I bough my car..so I guess my car has 19.xx lke Znod..as my car feels fast and not sluggish..

Originally Posted by grogan545' post='232048

SHOOT! I have a BMW service appointment tomorrow morning for an SIB (service bulletin) for rough start in the mornings[b] what to do ? I can live without the upgrade because i have lived without it since I bough my car..so I guess my car has 19.xx lke Znod..as my car feels fast and not sluggish..

Originally Posted by subterFUSE' post='232144' date='Jan 30 2006, 06:36 PM

Does this affect SMG equipped cars?

I have version 18.1 ..... should I keep it? I would enjoy the improved active steering, but I don't want to lose acceleration to get it.

Originally Posted by EBMCS03' post='232171' date='Jan 30 2006, 05:39 PM

Someone with an SMG go update and tell us what happens. I want to know but dont want to be the guinea pig.