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Thread: Has anyone on here converted from MS45.1 to MS43?

  1. #1
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    Has anyone on here converted from MS45.1 to MS43?

    Hi Folks,

    I know this topic has been discussed a few times on here, but I figured we could start a new thread to better organize the information needed for those considering the switch.

    Let's not focus so much on the why's or why not's, as that is a separate discussion of its own; but rather on the process of actually making the switch. For those who are unaware, making the switch to MS43 opens doors on the software/tech side of things, where MS45.1 has essentially been left in the dark. You can learn more about this by reading this thread entirely: http://forum.e46fanatics.com/showthread.php?t=1082287

    Some of the benefits:
    • Launch control (fixed RPM & selection on the fly via multi-function steering wheel)
    • No lift shift (soon)
    • Everything needed for tuning (any tuner will now be able to dyno-tune your car)
    • Live Tuning (while on the rollers - soon)
    • Exhaust pop/burble on decel
    • Spark cut in lieu of fuel cut red-line
    • and more...


    With all of the support on MS43 being readily available now, the software side of things have been well covered. Virginizing MS43 DME's to align with our existing EWS is an option (as well as eliminating the EWS altogether). Now, from what I've been able to learn online, we need the following to successfully switch from MS45.1 to MS43:

    1. MS43 ECU
    2. MS43 Engine Harness
    3. MS43 MAF
    4. MS43 Intake Temp Sensor (in the manifold, rather than in the MAF)
    5. LC-2 Wideband (optional)


    I'll come back to edit this post later, as I am currently at work - but I figured I'd go ahead and get this online for others to contribute. Feel free to suggest items I've missed or incorrectly listed/described.

    Cheers,

    PS: Big kudos to the guys on E46F for opening these doors for those running MS43. Without them, none of this would be possible.

    Update: I am currently on the hunt for the items needed to complete this conversion. My goal is to photo document this process. The first step will be to layout the MS43 harness next to the MS45.1 harness for comparison. I've been doing some reading online and have found that there are some folks who have run into issues with the alternator and throttle body connectors being different between the harnesses, while others claim that it is plug n play.
    Last edited by wertyu78; 01-21-2016 at 07:27 AM.

  2. #2
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    So much work. So many possibilities tho


    -Sent from Mobile

  3. #3
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    I had no idea this was a thing for our cars. Interesting...

  4. #4
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    Terra??


    ---
    "ZHP is a garbage option anyway- just some cosmetic upgrades with a different cam and diff to claw back some of the performance lost fitting those hideous and heavy wheels. Any 330 with a 3.46 diff will smoke a ZHP every time. The whole Mafia thing reeks of childish behavior." - an e46fanatic

  5. #5
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    Video's of said exhaust pop/burble on decel






  6. #6
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    Says don't focus on whys. Tells us benefits first.



    I love the idea of this. Great thread.

    Sent from my SM-G925V using Tapatalk
    "Flame suit NOT REQUIRED!!!"
    Call Me Dane l 2/2004 330i ZHP l 18x8 ET45 BBS CK's wrapped with Michelin Pilot Sport AS3+ @ 245-40-18 l KW V1 Coilovers in front l KW V1 springs w/ Bilstein B8 dampeners in rear l BMW Performance Rotors l UUC StrutBarbarian l Racing Dynamics Rear Strut Bar l Jim Conforti Shark Injector l Light Birch Interior Trim l Bimmian Celly Mount l M3 Trunk Mat l l e90 Performance E-Brake & Shift Knob l M3 Tri-Stitched Boots l AL Headlight Retrofit with ZKW Lenses l CobyWheel Wrap w/M3 Stitching l LCM sw 4.5 triple blink and rear fogs

  7. #7
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    What happened to our popcorn eating emoji guy? Beer seems like a decent replacement...


  8. #8
    Join Date
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    Update: I am currently on the hunt for the items needed to complete this conversion. My goal is to photo document this process. The first step will be to layout the MS43 harness next to the MS45.1 harness for comparison. I've been doing some reading online and have found that there are some folks who have run into issues with the alternator and throttle body connectors being different between the harnesses, while others claim that it is plug n play.

  9. #9
    Join Date
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    Quote Originally Posted by danewilson77 View Post
    Says don't focus on whys. Tells us benefits first.



    I love the idea of this. Great thread.

    Sent from my SM-G925V using Tapatalk
    I've gotta entice everyone somehow

  10. #10
    Join Date
    Jan 1970
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    Lebanon, OH
    Posts
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    Lol.

    Sent from my SM-G925V using Tapatalk
    "Flame suit NOT REQUIRED!!!"
    Call Me Dane l 2/2004 330i ZHP l 18x8 ET45 BBS CK's wrapped with Michelin Pilot Sport AS3+ @ 245-40-18 l KW V1 Coilovers in front l KW V1 springs w/ Bilstein B8 dampeners in rear l BMW Performance Rotors l UUC StrutBarbarian l Racing Dynamics Rear Strut Bar l Jim Conforti Shark Injector l Light Birch Interior Trim l Bimmian Celly Mount l M3 Trunk Mat l l e90 Performance E-Brake & Shift Knob l M3 Tri-Stitched Boots l AL Headlight Retrofit with ZKW Lenses l CobyWheel Wrap w/M3 Stitching l LCM sw 4.5 triple blink and rear fogs

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