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Why cant I run my M52 in OBD2 configuration on my swap?

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    #31
    :no: you can't do the o2 sensors either...he's thinking obdI EWS.
    No more e30s for me.
    88 black BMW OBDII 332is dedicated track [sold]
    88 BMW OBDII bronzit 332is [RIP 03/08]
    91 BMW 325i [sold]
    86 Corolla 'Ae86' HB 20v trd [sold]
    http://youtube.com/watch?v=pTj7Hn9v5Rs

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      #32
      No, I'm pretty sure you can.
      My 2.9L Build!

      Originally posted by Ernest Hemingway
      There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely games.

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        #33
        Originally posted by PiercedE30 View Post
        No, I'm pretty sure you can.
        If your tuner is good enough with code it is theoretically possible. I can't say if it's ever been done or not.
        sigpicFormer professional wrench thrower.
        Current:
        1988 325is S52
        Former:
        2008 Sparkling Graphite M3 Sedan(victim of home ownership)
        1988 M5
        1996 328is

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          #34
          Im not running cats or the post cat O2 sensors, or air pump. My info is that the post cat o2's are there strictly to monitor cat performance, with no effect on engine performance. You do however apparently lose the closed loop function at cruise with the parts missing(plus trigger the associated codes), which will worsen the fuel economy.
          If you have access to the donor car, and you want to use OBD2, install the above mentioned. Im still considering doing the same, just have'nt had the time(M3 cams + M50 intake await install also )
          The ews stuff is exactly as the others have noted, and in my case has worked flawlessly for almost 3 years. If you can get a key, buy 2. Cheap insurance in case one shits itself(not unheard of).
          The above was info from a factory tech 3 years ago, and proved to be helpful when I did my swap. Biggest problem still seems to be too many opinions from people who have never even attempted this swap, but feel compelled to regurgitate rumours as fact.
          Dudes like etasport, stereoinstaller would've been a godsend to me years ago, as they obviously know what they're talking about.

          With respect to tuning, take a stroll over to a e36 site. No shortage of people there tuning, many with dyno charts posted.

          Last edited by jrez; 11-22-2007, 10:45 PM.


          At the race track.

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            #35
            Can you share with us what all is necessary?

            did you need to swap the brake booster or does the stock one work with the obd2 manifold?

            e34 pan fits fine?

            what driveshaft and tranny did you use?

            do you have any wiring charts that you used? is it pretty much just looking at the ETMs and matching things up?

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              #36
              Im at work right now, but I'll give you some quick answers;

              Brake booster - modified 320i unit, no way the stock one will fit.

              e34 pan fits fine

              drive shaft/tranny - all e36 here, no issues with fitting to the e30


              for wiring, I used the bently manual for the 328i, and a reproduction factory wiring manual for the e30, as the Bently e30 one sucked for schematics.
              I fix commercial aircraft for a living, so i've spent a decent amount of time in wiring schematics, and I was able to make some educated guesses as to how some of the components needed to be wired up.
              Like I said earlier, there was'nt much available in terms of help 3 years ago, but having done it, I can say it is not rocket science.
              If you have some specific questions I'd happy to pass on what I did.


              At the race track.

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                #37
                alright thanks for the help. Im debating whether i should do the swap or not. There is an m52tu daul vanos (same engine you have??) for sale locally.

                did you save your final wiring decisions? that would be a big help. Also doing some searching i found that you had to convert the speedo signal to digital? what was involved in that?


                edit: looking more closely your engine looks like the m52, not the m52tu, The pan gasket part numbers are the same though so hopefully that will work. I guess no one has ever put a m52tu in an e30 before? sucks for me haha

                I'm bet for the most part is very similar to the m52. The main difference being dual vanos.
                Last edited by e304me; 11-24-2007, 11:20 PM.

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                  #38
                  Originally posted by WillisE30 View Post
                  If your tuner is good enough with code it is theoretically possible. I can't say if it's ever been done or not.
                  It has.

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                    #39
                    I dont know if it will help, but I have seen an m54 installed in an e30 over on e30tech. when I asked the owner about his ecu "mods" he said a bmw tech friend of his disabled a lot of the functions that werent required, but couldnt specify. So, yes it is possible to do a dual vanos m52tu.

                    The TU however is MS42 as opposed to the MS41.1. There are a few different things. You still have an MDK throttle valve which has a cable as opposed to the EDK and throttle motor. It also has a DISA manifold. You still might be able to swap an earlier manifold over, but the DISA is probably your best bet for performance, even over the m50.

                    It also has EWS 3.3 which might put a few snags in things. If you think you are really serious about doing it let me know. I have all the IPO charts and the technical training manual for MS42, as well as all the info on EWS systems. You may need to get all the parts from the donor car though, as im not sure if you'll be able to encode the module in the e30 without a complete CAN-bus.
                    Old and improved:

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                      #40
                      Originally posted by e304me View Post
                      alright thanks for the help. Im debating whether i should do the swap or not. There is an m52tu daul vanos (same engine you have??) for sale locally.

                      did you save your final wiring decisions? that would be a big help. Also doing some searching i found that you had to convert the speedo signal to digital? what was involved in that?


                      edit: looking more closely your engine looks like the m52, not the m52tu, The pan gasket part numbers are the same though so hopefully that will work. I guess no one has ever put a m52tu in an e30 before? sucks for me haha

                      I'm bet for the most part is very similar to the m52. The main difference being dual vanos.
                      I'd stay away from the M52tu. Its actually a very different motor from the M52. Aluminum block, different engine management, manifolds, etc.
                      '91 318is
                      sigpic

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                        #41
                        well the aluminum block is why i wanted to use it, it saves 50lbs over the iron block.

                        is the 97-98 z3 the only other option? they are a much straight forward drop in right?

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                          #42
                          Very straight forward. Its just OBD1 swap and go.

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                            #43
                            Originally posted by e30_kid89 View Post
                            Very straight forward. Its just OBD1 swap and go.

                            and what do you with the exhaust cam vanos?


                            At the race track.

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                              #44
                              i think he was talking about the single vanos m52 z3 engnie

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                                #45
                                my bad


                                At the race track.

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