N54 DCT w/M3 Conversion

[aus335iguy]

So the reason a driveline swap is required is because somewhere in the tcu it sees the current road speed from the DSC it then calculates the revs required after the next gear change and asks for these revs from the DME. If you can intercept and change that rpm request in any way you can do it. Or we could find a TCU file with the drivelogic functionality but with the correct diff ratio. 1M which doesn’t exist in the datum. Or does it?

 

[RSL]

Yes, M3 TCU seems to be programmed for 3.15 FD, so could do the full driveline swap or at least change rear ends to something closer. I haven't verified DME controls the shifts single-handedly, but RPM ranges/hysteresis and gear torque calcs indicate it plays its part in what is allowable and when, if not dictates it wholly.

There are a lot of other things involved and not sure what all impacts it between DME/TCU, but the cars were drivable and everything working on M3 bits/coding, just crappy shifting on 2.56. If calculated torque/rev, input/output shaft speed ratios, etc. can be calculated to something in the middle through the gearing values, M3 flash might work on the 2.56 to shift "ok".

Only one way to find out though. Went I get back, may again start looking for an M3 EGS, drivelogic button/console and Kombi if its needed, get it installed/flashed and then screw around with DME until shifts work or I give up lol

 

[aus335iguy]

Ive got the EGS but none of the expertise so I suppose its up to you sir....

 

[RSL]

No expertise, just don't mind messing with stuff lol Come to think of it, not sure any of that is even necessary just to test shift points. Does it still operate the tranny with just the M3 TCU bin/non-M VO coding? I don't remember and don't have time to search back through everything right now, but basically just need it to move and shift without errors for that really.

 

[aus335iguy]

It does but shifts in the upper speed ranges aren’t correct (from memory)

 

[Koolsilver]

As far as the KOMBI, is it necessary to get one from a DCT M3 or would the 6MT work also. Since shift lights don’t work I think it would look cleaner to have the 6MT cluster.

 

[LMB335is]

As far as the KOMBI, is it necessary to get one from a DCT M3 or would the 6MT work also. Since shift lights don’t work I think it would look cleaner to have the 6MT cluster.

You don't have to have the M3 cluster but it looks better IMO and either one will work. The stock cluster will too once coded.

 

[Koolsilver]

You don't have to have the M3 cluster but it looks better IMO and either one will work. The stock cluster will too once coded.

I agree the cluster does look better that’s why I’m wanting to swap it. Just want to make sure that I don’t need a particular one if I’m hoping to get MDrive and MDM to work.

 

[Koolsilver]

I'm gathering the parts to perform this conversion right now but I am going from a 6AT to DCT also. Do you guys remove the original parking system for this conversion or is it still maintained? I would rather not have to buy a part that is not going to be needed. Also does anyone have a part number for the 8 pin connector mentioned?

 

[ganque]

Has anyone attemped this retrofit on a 135is with N55 engine? I see that most (if not all) the comments in this group are from people with N54 engines on DCT.

 

[Seb335i]

Hi all I've an E93 N54 with DCT I've retrofitted an M3 DCT cluster does anyone know if there is a way to make the shift light works ?
Another question is that possible to have the "M big display" with the standard GWS when I code my kombi with the M variant I've got a transmission fault code.

 

[LMB335is]

Hi all I've an E93 N54 with DCT I've retrofitted an M3 DCT cluster does anyone know if there is a way to make the shift light works ?
Another question is that possible to have the "M big display" with the standard GWS when I code my kombi with the M variant I've got a transmission fault code.

No and no, unfortunately.

 

[aus335iguy]

Pretty sure the shift lights are a DME function and so as the man said....sorry mate

 

[L€X]

Hello, guys! Did I understand correctly, mdm Mode will enable in 335 dct with this mods, and dsc will work like in m3? I installed 1m flash, m3 komby, m3 dsc, m3 central console and m3 szl with m mode. I have green m mode on indicator, but dsc mode don't work like in m3. My M drive menu all unchanged, when I choose dsc m dynamic mode, it's dumped back to unchanged.

 

[Seb335i]

Hello, guys! Did I understand correctly, mdm Mode will enable in 335 dct with this mods, and dsc will work like in m3? I installed 1m flash, m3 komby, m3 dsc, m3 central console and m3 szl with m mode. I have green m mode on indicator, but dsc mode don't work like in m3. My M drive menu all unchanged, when I choose dsc m dynamic mode, it's dumped back to unchanged.

How did you make the 1M flash ?

 

[LMB335is]

Hello, guys! Did I understand correctly, mdm Mode will enable in 335 dct with this mods, and dsc will work like in m3? I installed 1m flash, m3 komby, m3 dsc, m3 central console and m3 szl with m mode. I have green m mode on indicator, but dsc mode don't work like in m3. My M drive menu all unchanged, when I choose dsc m dynamic mode, it's dumped back to unchanged.

Short answer is no, MDM will not be functional. The M3 DSC unit will work in either fully on or fully off modes and MDrive is not functional.

 

[L€X]

Short answer is no, MDM will not be functional. The M3 DSC unit will work in either fully on or fully off modes and MDrive is not functional.

It's a pity! Only adjustable launch control and green m mode will work?

 

[LMB335is]

It's a pity! Only adjustable launch control and green m mode will work?

Adjustable launch control worked without IKM0S. The "M" as it relates to the IKM0S rom is M Dynamics which is just a really fancy way of describing increased throttle sensitivity. These tables were made public two or three months ago so really anyone can have the IKM0S "M" mode on their car. You can copy the settings to all your throttle tables and essentially have M mode as you default mode.

 

[L€X]

Adjustable launch control worked without IKM0S. The "M" as it relates to the IKM0S rom is M Dynamics which is just a really fancy way of describing increased throttle sensitivity. These tables were made public two or three months ago so really anyone can have the IKM0S "M" mode on their car. You can copy the settings to all your throttle tables and essentially have M mode as you default mode.

Thanks, it's great. But I'd like to find a way to enable dsc mdm mode on 335i...

 

[LMB335is]

Thanks, it's great. But I'd like to find a way to enable dsc mdm mode on 335i...

Its controlled by the DME in the M3.