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      03-13-2010, 10:09 AM   #1
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Bavarian Technic Owners Thread

I just recently purchased the Bavarian Technic software and would like to start an open discussion with other E9x M3 owners that use this application. Hopefully we can share tips and help each other solve problems with this application.

Some of the available values that I believe should be useful are:
Ambient Temp, Engine Speed, Engine Temp, Induced Air Temp, Fuel Nominal Pressure, and Lambda actual value before catalytic converter bank 1 & 2.

However, most of data provided by the above values is displayed incorrectly on my 2009 E92 M3.
For example:
My ambient temperature is showing 2608 degrees Celsius and the engine temperature is 3336 degrees Celsius.
The O2 sensor values are in the 15000 Ė 16000 range
Iím working with Owen at Durametric Software to get this corrected. I have already tried two new ECU files that were suppose to correct the situation, but no luck yet. Hopefully with a little patience this will get resolved and be included on the next software release.

For those are not having any problems (2008 M3s):
What are some of the available values that you like to use when monitoring the car? Has anyone found which available value will display total ignition timing?
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      03-13-2010, 11:30 AM   #2
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Thanks PG!

I knew you would be one of the first guys to chime in. I can use your AFR & Temperature formula in my own spreadsheet. Though I would much rather they get it corrected in the software. Please let me know which available value add will display the aggregated ignition timing and any other available values that you found useful/interesting when you get a chance.

Do you believe the OEM Lambda sensors are just as accurate as a standalone wide band O2 sensor and gauge?
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      03-13-2010, 11:34 AM   #3
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I used this software on my old 335i (1 VIN cable), it worked flawless. Had to buy a new cable for the M3 and tried. I'm getting weird values now.

IMO we should document the bugs here as well and raise a RFC for bug fixing.

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      03-13-2010, 01:15 PM   #4
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I just used it for the first time this morning. The actual values that it spits out seem to graph very well for me in Excel without conversion. I think that might be behind some of the scaling factors they use.

On another note, my computer kept locking up the first few times I tried to record actual values. I turned off as much of Norton 360 as I could and it worked much better. It might be much better to use a dedicated basic laptop like an IBM T30 with just basic software for this work.
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      03-16-2010, 06:38 AM   #5
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Yeah I've logged the issue around the actual values scaling being out of whack - they got me to try a few custom ECU definition files but they never resolved the problem.
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      03-18-2010, 01:58 PM   #6
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Good News!!!

After several attempts of trying different ECU files that Owen has sent me I have finally got one that is working correctly! Once they incorporate the new ECU file into the software (should be this weekend) they will send it to me for final testing and put the new software version on their website for you guys to download. I will let everyone know when it's available.

Here is a screen shot of the corrected values:

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      03-18-2010, 02:24 PM   #7
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This is really good news .

Which problems have been addressed ? Thank you for testing !
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      03-25-2010, 01:12 AM   #8
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Just downloaded Version 1.7.5.0

Let's see whether anything has improved.
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      03-25-2010, 03:37 AM   #9
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Did a short test - values look much better now. However, got an exception error during program execution. I'll continue testing over the weekend.
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      03-25-2010, 05:00 AM   #10
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Quote:
Originally Posted by e.n335 View Post
Did a short test - values look much better now. However, got an exception error during program execution. I'll continue testing over the weekend.
Same here, values look much better. I used to get exceptions, haven't had one for a while. This is running on Windows 7 32-bit...
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      03-25-2010, 06:50 AM   #11
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my laptop is on Windows 7 64-bit - FYI
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      03-25-2010, 07:03 AM   #12
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Quote:
Originally Posted by PencilGeek View Post
Here's some of the conversion formulas for you:
  • Actual Torque (Nm): Value/10
  • Temperature (F): =Cel2F(((E3+273.2)/10)-273.2) If you want Celcius, don't do the Cel2F function.
  • Ambient Pressure (Hg): =MBar2Hg(G3* 0.0689476). If you want in millibar, ignore the MBar2Hg conversion.
  • AFR: Lambda / 1000 * 0.88
To get some of these conversions in a spreadsheet, download the virtual dyno software here:
http://www.m3post.com/forums/showthr...t=Virtual+Dyno

...
Actual torque does not work in the most recent version (shows 1000NM constantly). Lambda values are correct now.
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      03-25-2010, 02:09 PM   #13
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Owen just emailed me today and said put the new version (1.7.5.0) was posted on their website last night, but looks like you guys were already setting on GO. As you can see Owen and the guys at Durametric are willing to get things corrected, so letís continue to report any problems we come across.

Here is an updated list of the actual values I like to use:

Ambient Temp
Engine Speed
Engine Temp
Induced Air Temp
Fuel Nominal Pressure
Lambda actual value before catalytic converter bank 1
Lambda actual value before catalytic converter bank 2
Pedal Position
Actual Gear


Questions:
1. Has anyone been able to find which value gives an average-total timing? I came across Angle of Ignition Cyl 1 which might be the timing for Cylinder 1.

2. What about a value that displays manifold pressure, such as vacuum/boost? Closest thing I found for that is Inlet Manifold mBar, but when converted to PSI it does not appear to be what Iím looking for.

3. Finally, the value Iím getting for Fuel Nominal Pressure is 44-88 psi (converted from bar). Is that right? 88 psi seems really high.
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      04-09-2010, 08:14 AM   #14
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New software is out there and working with our M3 yet nobody has any input or something to share?

Come on folks contribute!

I have found the answer to one of my questions above. Our car does in fact achieve 88psi at WOT. This is good information to know!
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      04-09-2010, 09:05 AM   #15
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^ A big thank you for your efforts, as well as others, to get the BT software functioning properly and dialed in!
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      04-09-2010, 09:44 AM   #16
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downloaded 1.7.5.1 this morning and will perform some tests tomorrow. will report back. thanks to all for their contribution and their efforts.
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      04-12-2010, 04:39 AM   #17
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Performed testing, it seems things got worse again. BT really should get a M3 for some time to fix the problems, IMO.

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      04-12-2010, 06:34 AM   #18
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Quote:
Originally Posted by e.n335 View Post
Performed testing, it seems things got worse again. BT really should get a M3 for some time to fix the problems, IMO.

Eugen
How did things get worse? I have not tried version 1.7.5.1 that you downloaded, but 1.7.5.0 has been working fine (at least for the values I have selected to monitor).

Yes they should get an M3 for testing, but it looks like they are not going to do that so it's up to us for now.
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      04-12-2010, 08:57 AM   #19
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^ ignition timing shows random numbers sometimes. i did not test too much having been frustrated about the new version. runtime errors can be avoided by lowering the sample rate, but hell it should not be like this. i also need to know where i can read engine / clutch torque ( basicly crankshaft torque ).

i used this tool quite often on my former 335i, it worked flawless. now, on the M3 it's good to read and clear codes. currently it seems to be too buggy for serious datalogging, which i'd like to do in advance of a tune.
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      04-12-2010, 04:32 PM   #20
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Which value are you looking at for ignition timing?

PencilGeek created a virtual dyno program awhile back that displays HP & TQ, but I believe he discovered that once you modifiy the ECU it was not very accurate.
http://www.m3post.com/forums/showthr...t=virtual+dyno
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      04-15-2010, 01:25 PM   #21
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Does this tool let you see adaptation values for the M3? If so, does it let you clear them?

Does it show manufacturer specific codes for the M3, or only OBD2 codes?
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      04-15-2010, 01:46 PM   #22
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Quote:
Originally Posted by FStop7 View Post
Does this tool let you see adaptation values for the M3? If so, does it let you clear them?
No, not that I'm aware of.

Quote:
Originally Posted by FStop7 View Post
Does it show manufacturer specific codes for the M3, or only OBD2 codes?
The software displays the manufacturer specific codes & description.
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