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Thread: Looking into making an MSPNP Pro for the M50 and M52 engines

  1. #176
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    Yeah I've been meaning to put together a build thread. Just need to gather all my pics and info. I'll be working on that soon. Here's a vid from a couple months back in Orlando FL (I'm in South fl) https://youtu.be/vAqB_2LwsXg

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  2. #177
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    01 530i
    I have an S52 swap in my car (M52 originally). I have used both the original M52 DME and the S52 DME to run the motor with no codes and all sensors working. The wiring harness was not touched just the motor and the DME were swapped.

  3. #178
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    #Project333Ti & Z3 Coupe
    An obd2 m52 harness is the same as the s52 harness, and both DMEs can be used interchangeably aside from the specific tune for each. I know this for a fact, as I've got an s52 harness running my Ti with an m52 DME and an s52 tune.

  4. #179
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    99' 323is, 99' 328is
    How about m52 323is which only has 2 o2 sensors? Same pinout as m52 and s52?

  5. #180
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    Quote Originally Posted by JimsR View Post
    How about m52 323is which only has 2 o2 sensors? Same pinout as m52 and s52?
    All 6-cyl (M52/S52) OBD2 cars seem to have the same pinouts yes

  6. #181
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    Quote Originally Posted by somebody5788 View Post
    May need to check the source. I believe the S52 and M52 are the same computer other then some coding. I think you can even reflash an M52 ECU to S52 software if you know what you're doing. M50/S50 vs M52/S52 are pinned differently though.
    OK, I took a closer look and found out where I went wrong. Someone at Alldata accidentally accidentally pasted the M44 wiring diagrams into the S52 section, and I hadn't paid close enough attention to realize that I was looking at a pinout with only four injector and four coil outputs. Thank you (and the others who chimed in) for setting the record straight there.

    The 323 M52 looks like it's the same too.

    Quote Originally Posted by Bke36Is View Post
    Put me down for an obd2 setup but I have a couple questions. My car is an automatic with a powerglide (manually shifted) so I don't any problem there but will I be able to use the solenoid and 4.9 lsu wideband sensor from my current boost controler/wideband setup and will a racepak dash work with the ms3pro?
    Yes, although the sensor will need an external controller like an Innovate LC-2.

    We support Racepak dashes no problem. The new IQ3S just needs to be wired to our CAN output; earlier versions need a CAN to V-net adapter.
    Matt Cramer
    1997 BMW 328i convertible, 1972 Chevy C10 pickup, 1966 Dodge Dart slant six
    BMW - where "Why doesn't everybody build cars the way they do?" meets "Why can't they build a car the same way everyone else does it?"

  7. #182
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    Quote Originally Posted by Matt Cramer View Post
    OK, I took a closer look and found out where I went wrong. Someone at Alldata accidentally accidentally pasted the M44 wiring diagrams into the S52 section, and I hadn't paid close enough attention to realize that I was looking at a pinout with only four injector and four coil outputs. Thank you (and the others who chimed in) for setting the record straight there.

    The 323 M52 looks like it's the same too.



    Yes, although the sensor will need an external controller like an Innovate LC-2.

    We support Racepak dashes no problem. The new IQ3S just needs to be wired to our CAN output; earlier versions need a CAN to V-net adapter.
    OK good info. I'm currently running an innovate scg-1 boost controler/wideband/ data logger. I don't mind keeping it if I need it.

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  8. #183
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    1999 Bmw M3
    So bmw m3 s52 obd2 is a go?

  9. #184
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    I don't see why not!

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  10. #185
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    Quote Originally Posted by Mzfhartge View Post
    So bmw m3 s52 obd2 is a go?
    That's correct. If we can get both an M52 and an S52 test car, we can have a map for both.
    Matt Cramer
    1997 BMW 328i convertible, 1972 Chevy C10 pickup, 1966 Dodge Dart slant six
    BMW - where "Why doesn't everybody build cars the way they do?" meets "Why can't they build a car the same way everyone else does it?"

  11. #186
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    Quote Originally Posted by Matt Cramer View Post

    That's correct. If we can get both an M52 and an S52 test car, we can have a map for both.
    Focus on S52. Not many here will be playing with M52. Even tho, same difference.
    1996 332IS
    Built 3.2
    CES/Steed TS Precision 6466, spraying a "$π!℅" load of meth.
    Technique Tuning 80# tune.
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    Your 1 and only stop for all your BMW performance needs
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  12. #187
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    Quote Originally Posted by Butters Stoch View Post
    Focus on S52. Not many here will be playing with M52. Even tho, same difference.
    Agreed. If any m52 users arise they can work with the s52 tune imo

  13. #188
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    Red Sled, RC51
    S50 instead!!!

    "Believe nothing you hear, half of what you read"


  14. #189
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    I think you will be surprised how close the tunes will be between an S52 and an M52 with the usual S52 cams. Once you reset the displacement in the basic settings you will actually probably have to add a small amount of fuel to the VE map and that should be about it. That's just my prediction, could be wrong.

    - - - Updated - - -

    And of course megasquirt is open, so you guys will be able to share timing and fuel maps, or even the whole tune file with each other.


    86 325es, 2.8L m50, S476sxe, ProEFI 128 ecu, e85, solid rear axle, TH400 trans, 28x10.5w slicks, zip ties, popsicle sticks, tape
    best time 9.06 @ 151.8 mph, best 60 foot 1.30

  15. #190
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    Ive got a few OBD2 cars running various FI setups down the street from you
    460whp/515wtq wifes MMW tuned 335i

  16. #191
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    Def is offline Lead Disagreement Eng PE
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    Quote Originally Posted by someguy2800 View Post
    I think you will be surprised how close the tunes will be between an S52 and an M52 with the usual S52 cams. Once you reset the displacement in the basic settings you will actually probably have to add a small amount of fuel to the VE map and that should be about it. That's just my prediction, could be wrong.

    - - - Updated - - -

    And of course megasquirt is open, so you guys will be able to share timing and fuel maps, or even the whole tune file with each other.
    Yea, it's not hard at all to get a basemap on a standalone if you know some basics. I guessed at everything on my initial AEM Infinity startup and it was perfectly fine to drive around and go lightly into boost with no O2 feedback. With O2 feedback it would have been fine to start beating on it straight away (but I wouldn't do that, but it's possible).


    People need to realize on a standalone you can SEE everything the computer is doing. It's not a black box like a stock computer. If it's a little lean in an area - put more fuel in - solved. If it knocks a little, take some timing out - etc.

  17. #192
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    Quote Originally Posted by Matt Cramer View Post
    That's correct. If we can get both an M52 and an S52 test car, we can have a map for both.
    Where are you located?

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  18. #193
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    almost all m52's will have s52 cams in it. I quick change to the displacemnt setting in megasquirt and the same map will be extremely close. Ive used my s52 cam m52 map on alot of s52 cars and its very very close.

    - - - Updated - - -

    Quote Originally Posted by Bke36Is View Post
    Where are you located?

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    Your car will be a moster on MS. Timed launch control and all sorts of fun stuff for an auto.

    Keep your gauges. Just add the 5v out put from your wideband controller to the EGO pin of the megasquirt. Done deal.
    328i Sedan Twin s366's, 6.0LS, TH400, MS3 Ultimate
    9.20 at 150 on 22psi

  19. #194
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    Quote Originally Posted by Bke36Is View Post
    Where are you located?

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    Suwanee, Georgia. By the time the group buy starts, we'll probably have moved to a new building in Gainesville (another reason we couldn't get started immediately).
    Matt Cramer
    1997 BMW 328i convertible, 1972 Chevy C10 pickup, 1966 Dodge Dart slant six
    BMW - where "Why doesn't everybody build cars the way they do?" meets "Why can't they build a car the same way everyone else does it?"

  20. #195
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    Quote Originally Posted by Matt Cramer View Post
    Suwanee, Georgia. By the time the group buy starts, we'll probably have moved to a new building in Gainesville (another reason we couldn't get started immediately).
    If you're moving to gainesville fl I'd be willing to bring my car for a test mule. Just need to know when and where. My car has an s52 in it

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  21. #196
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    Put me down please for s52 obd2, thanks.

  22. #197
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    Quote Originally Posted by Mzfhartge View Post
    Put me down please for s52 obd2, thanks.
    Your going to tune the hell out of it ?
    1996 332IS
    Built 3.2
    CES/Steed TS Precision 6466, spraying a "$π!℅" load of meth.
    Technique Tuning 80# tune.
    1/4 mile 10.84 @ 136.72
    Your 1 and only stop for all your BMW performance needs
    WWW.CESMOTORSPORT.COM

  23. #198
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    E85 too, waiting on you

  24. #199
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    We are at like 15 obd2's , do we get deeper discounts if we double the minimum ?
    1996 332IS
    Built 3.2
    CES/Steed TS Precision 6466, spraying a "$π!℅" load of meth.
    Technique Tuning 80# tune.
    1/4 mile 10.84 @ 136.72
    Your 1 and only stop for all your BMW performance needs
    WWW.CESMOTORSPORT.COM

  25. #200
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    ^This!

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