N54Tech.com - Your Source for International Turbo BMW Racing Discussion
(#1)
Old
Taron's Avatar
Taron Taron is offline
Senior Member
 
Posts: 585
Join Date: Jan 2013
Car: 2008 BMW 335XI
Default Msd81 vs msd81.1 vs msd81.2 - 10-22-2016, 06:55 PM

Hi

Going to swap my msd80 to 81 but found that they are different versions of it

Msd81, 81.1 and 81.2

Does anyone know what is difference between them?


Thanks


2008 335XI(E92) AT/ garrett gtx3582r with jpworks manifold 1.06AR housing/ tial mv-s 38mm wgs(13.5 psi springs)/ tial bov/ fuel it level1 upgrade/ index 12 injectors/ N20 Map sensor/JB4 ST TS BEF with MHD/ Alpina Flash for now.
Reply With Quote
(#2)
Old
MHD's Avatar
MHD MHD is offline
Senior Member
 
Posts: 515
Join Date: Jul 2013
Car: 07 335i AT
Default 10-25-2016, 01:34 PM

stick to 81, 81.2 is for 4 bangers I think.
Why swap DMEs?
Reply With Quote
(#3)
Old
the imitator the imitator is offline
Junior Member
 
Posts: 62
Join Date: Aug 2014
Car: e30
Default 10-25-2016, 01:51 PM

Making an assumption here, but I want to make the move because I'd rather replace the dme before the MOSFETs go boom. I think he may have the same reasoning.
Reply With Quote
(#4)
Old
MHD's Avatar
MHD MHD is offline
Senior Member
 
Posts: 515
Join Date: Jul 2013
Car: 07 335i AT
Default 10-25-2016, 01:59 PM

Quote:
Originally Posted by the imitator
Making an assumption here, but I want to make the move because I'd rather replace the dme before the MOSFETs go boom. I think he may have the same reasoning.
Get new, quality coils I think that's most of the time the issue that causes mosfets to go south.
Reply With Quote
(#5)
Old
the imitator the imitator is offline
Junior Member
 
Posts: 62
Join Date: Aug 2014
Car: e30
Default 10-25-2016, 02:21 PM

I definitely agree with the concept of "replace before anything goes wrong", however perhaps to educate me further here.. isn't it a mixed result? I thought it also had to do with folks slowly going FBO and the demands as such. I only ask because why replace if it's truly just preventative maintenance killing the MOSFETs. Surely save me a little change.
Reply With Quote
(#6)
Old
808AWD325xi's Avatar
808AWD325xi 808AWD325xi is offline
Ballin' out of control.
 
Posts: 51
Join Date: Jan 2008
Car: 2009 BMW 335i
Default 11-05-2016, 08:47 AM

Quote:
Originally Posted by Taron
Hi

Going to swap my msd80 to 81 but found that they are different versions of it

Msd81, 81.1 and 81.2

Does anyone know what is difference between them?


Thanks
Those MSD81 variants are for different engines, besides, it's not as simple as just swapping DMEs...the CAS module and the DME exchange a rolling code referred to as the ISN. The DME will not enable ignition or fuel injection until a valid ISN is received. You realistically have three options:
  • Purchase a new DME and BMW will ensure that the ISN matches your CAS.
  • Purchase a used matched set (keys/DME/CAS) from a donor vehicle.
  • Purchase a used DME and find an indy with the proper tools to read the ISN and write it to your existing CAS module.


Alpina B3 Flash/BMS OCC/ER CP/ETS 5/HKS BOV/M3 Control Arms/OFT
Reply With Quote
(#7)
Old
duracell8 duracell8 is offline
Junior Member
 
Posts: 274
Join Date: Aug 2014
Car: 2008 535i
Default 11-07-2016, 08:29 PM

Cheaper to get a dme from the power performance package than a replace to stock dme from bmw. Save around $500 retail. They change to the msd 81.



2008 535i RB Turbos, ER Charge pipe, Tial BOV, 2.3 gal BMS Meth 75/25, Dual nozzle CM10 and CM7, BMS Race Flash, 3" Down Pipe, JB4 ISO G5, N20 Map Sensor, BMS OCC, BMS PCV Valve, JB4 Mobile App, 12.3 @ 116 mph
Reply With Quote
(#8)
Old
Jo335i Jo335i is offline
New Member
 
Posts: 9
Join Date: Sep 2017
Car: Bmw 335i e92 2007
Default 01-19-2018, 05:25 PM

I have bmw 335i 2007 and I put mhd stage1 atock map and my dme mosfets fried together with injectors and this happened on the very first test drive after the installation of mhd tune. . The injectors were index 1.i boight used dme and replaced all 6 mosfets and I got all 6 new injectors index 12. Changed also spark plugs and new coils. But NOW i am afraid to try the mhd map again.
I was carless fpr over a month.
Reply With Quote
(#9)
Old
Jo335i Jo335i is offline
New Member
 
Posts: 9
Join Date: Sep 2017
Car: Bmw 335i e92 2007
Default 01-19-2018, 05:26 PM

Quote:
Originally Posted by MHD
Get new, quality coils I think that's most of the time the issue that causes mosfets to go south.

What do you think? Should I try again the mhd map?
Reply With Quote
(#10)
Old
Haynpunch's Avatar
Haynpunch Haynpunch is online now
Junior Member
 
Posts: 52
Join Date: Jun 2017
Car: 07 E90 335i
Default 01-20-2018, 05:38 PM

Mosfets going bad are a 50/50 deal. replacing them works sometimes but they tend to go bad again. swap to MSD81 never worry about it again. there are a few places that will do the swap in a timely manner. I had mine done locally (Norcal) so I didn't have to deal with sending my CAS and Key to program the new DME.


07 E90 AT 335I 130k
JB4 G5 - E85 BEF
DCI
VRSF CP - TS RP BOV-Orange Spring
VRSF V2 D-P's
7" FMIC
Stage 2 Bucket
Reply With Quote
(#11)
Old
Jo335i Jo335i is offline
New Member
 
Posts: 9
Join Date: Sep 2017
Car: Bmw 335i e92 2007
Default 01-20-2018, 05:47 PM

Quote:
Originally Posted by Haynpunch
Mosfets going bad are a 50/50 deal. replacing them works sometimes but they tend to go bad again. swap to MSD81 never worry about it again. there are a few places that will do the swap in a timely manner. I had mine done locally (Norcal) so I didn't have to deal with sending my CAS and Key to program the new DME.
In my country is difficult to find someone to do the swap (🇭🇷 croatia). Only thing would be to send the ecu overseas for somebody to do it.
Reply With Quote
(#12)
Old
aus135i aus135i is offline
New Member
 
Posts: 6
Join Date: Oct 2017
Car: 135i
Default 01-21-2018, 01:07 AM

Just replace the mosfets in your current ECU. Save heaps of time a money. Once the new components are installed the ECU will not fail again. Apparently the Mosfet's used at the factory were flaky components. There is a DIY on youtube. If you are worried about DIY, any competent TV repairer or electronics tech will be able to perform the work.
Reply With Quote
(#13)
Old
Haynpunch's Avatar
Haynpunch Haynpunch is online now
Junior Member
 
Posts: 52
Join Date: Jun 2017
Car: 07 E90 335i
Default 01-21-2018, 06:42 AM

Quote:
Originally Posted by Jo335i
In my country is difficult to find someone to do the swap (���� croatia). Only thing would be to send the ecu overseas for somebody to do it.
Didn't realize you were out of country.

things we take for granted


07 E90 AT 335I 130k
JB4 G5 - E85 BEF
DCI
VRSF CP - TS RP BOV-Orange Spring
VRSF V2 D-P's
7" FMIC
Stage 2 Bucket
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump




vBulletin Skin developed by: vBStyles.com
Copyright 2007 - 2017, N54tech.com