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For discussion of Speeduino compatible boards designed / built by other members of the forum and for guidance around making such a board
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By evolwun
#32958
Looking great. BTW, I just did the math and realized your Youtube channel is Sipa's BMW Garage. I have been watching your videos for a while. Good stuff.
By pazi88
#32961
Raku wrote:
Thu Mar 21, 2019 3:29 pm
nice. i'm currently working on PCB for motronic 55 pin ecus and its like 50% complete. :)
Image
Well done! It's good to have that too. What engine(s) that would support? Those 55pin ones are not something that I know a lot. As far as I know, those are used in older m40 engines and in m20? Maybe even m30 and s38. The case is at least huge, so lot of room :D
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By Raku
#32978
current pin mapping is for the m20 but i been checking with some etms and looks like its same as on the m30 and s38. i did panned to add the m40 too but cant seems to find any m40 55pin etms.
pazi88 wrote:The case is at least huge, so lot of room :D
seems like it but not much room inside. mainly because of the heatsinks position and the cutouts for the case mounts.
By pazi88
#32986
Raku wrote:
Fri Mar 22, 2019 2:41 am
current pin mapping is for the m20 but i been checking with some etms and looks like its same as on the m30 and s38. i did panned to add the m40 too but cant seems to find any m40 55pin etms.
You are right. Can't seem to find those either. When m10 changes to m40 the ETM's only include m20 engines. And I found couple for late 318i, but those didn't have ecu pages at all. Strange. I will get back to you if I find one.

EDIT I got one in finnish. I will translate that to you.
By Vauhtivaunu
#33016
M20,M30 and M40 (e30 and e34) uses Motronic 1.3 in 55-pin configuration. Pins are exactly same. You can even use M40 Motronic in M20 or M30 engine if you chance EPROM. I´ve checked that. S38 uses Motronic 1.2 but it uses almost same pins as Motronic 1.3. Only difference is that 1.2 uses MAF, when 1.3 uses flapper-style AFM.
Last edited by Vauhtivaunu on Sat Mar 23, 2019 10:11 am, edited 1 time in total.
By Vauhtivaunu
#33017
Raku wrote:
Thu Mar 21, 2019 3:29 pm
nice. i'm currently working on PCB for motronic 55 pin ecus and its like 50% complete. :)
Image
How many ignition IGBT´s is in board? It would be nice to have wasted-spark capability. There is some unused pins in 55-pin connector that could be used for ignition control.
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By Raku
#33019
Vauhtivaunu wrote:
Sat Mar 23, 2019 10:07 am
M20,M30 and M40 (e30 and e34) uses Motronic 1.3 in 55-pin configuration. Pins are exactly same. You can even use M40 Motronic in M20 or M30 engine if you chance EPROM. I´ve checked that. S38 uses Motronic 1.2 but it uses almost same pins as Motronic 1.3. Only difference is that 1.2 uses MAF, when 1.3 uses flapper-style AFM.
thanks for the info. i suspect that too but its good to make sure that from someone with experience. :)

yeah has 6 ignition outputs (can be configured to run 4 cylinder full-seq) and 6 injector outputs ( also can be configured to run 6 cyl semi-seq or 4 cyl full-seq) . :D
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