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    #1

    M50 stroker advice

    So ive completed building and running in my m50 stroker engine, and im losing momentum on my build mostly due to not knowing what to do next. The engine mods include
    - m54b30 rotating assembly
    - M20 chromolly lightweight flywheel
    - 6puk clutch
    - headers to 2.5" straight to 3" muffler

    So im thinking the next thing I think I should do is sort out the AFR?

    Thanks in advance!
    .................................................. ...................sigpic
    .................................................. ............................. ......M50B25 3.1L stroker
    Tags: None
    #2
    Does it run? If so then id say drive it and drive it untill you get problems. Then correct and repeat untill the engine is all sorted. Then worry about the proper tune.
    Originally posted by Ferdinand
    I carry a cheap pressure gauge in my glovebox with which to manually check my tire pressures, but I keep forgetting that in the USA glovebox space is sacred as it is reserved exclusively for the purpose of storing handguns.

    DIVING BOARD DIVISION DIVISION IDIOT

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      #3
      heard that you could get an S50 tune
      Pm HakenTT he could hook you up with a tune

      Comment

        #4
        Do s50 cams, 24lb injectors and a 3.5 in intake a run a tune for an s50 with said mods.
        1987 325is - S52

        Comment

          #5
          Originally posted by mikegar View Post
          Does it run? If so then id say drive it and drive it untill you get problems. Then correct and repeat untill the engine is all sorted. Then worry about the proper tune.
          uh.. yeh Ive already run it in.

          Originally posted by JOMARO View Post
          heard that you could get an S50 tune
          Pm HakenTT he could hook you up with a tune
          Ill give that a go! cheers

          Originally posted by NickL View Post
          Do s50 cams, 24lb injectors and a 3.5 in intake a run a tune for an s50 with said mods.
          Ill have to get a cam grind to s50US spec intake cam and use the factory m50 intake on the exhaust side(correct?), in NZ we only get the euro s50. 24lbs = pink top injectors? Should I look at getting a larger fuel pump as well? Also mine is a PFL with the twin pump set up, do I need to upgrade both? Also being 3L do I need to worry about it leaning out with the increase in engine capacity?
          .................................................. ...................sigpic
          .................................................. ............................. ......M50B25 3.1L stroker

          Comment

            #6
            Call Turner motorsports or the racers market.

            Get a tune from the source not a copy pirate.

            Pair of usa s50b30 cams would be the most ideal option

            Sent from my SAMSUNG-SGH-I337 using Tapatalk
            OBD1 M54/M52TU swap as a M50b25

            Z4 non powered steering rack fits e30



            Euro e46 2005/6 320d 6mt gearbox into E30 with M20 hardy and beck 1985 327s engine

            Comment

              #7
              TRM OBD1 Performance Tune
              http://www.trmtuning.com/?product=trm-obd1-performance-software-2
              Please choose for the following option below in order for us to select the right chip for you. TRM has a tune for nearly every common set-up on the market. The most common will be available below. …


              S50 US cams would be a great addition. Not required though. Make specific notes on what you have.

              Comment

                #8
                Originally posted by Wanganstyle View Post
                Call Turner motorsports or the racers market.

                Get a tune from the source not a copy pirate.

                Pair of usa s50b30 cams would be the most ideal option

                Sent from my SAMSUNG-SGH-I337 using Tapatalk
                Copyright pirate? I forgot to mention it is non vanos. I think I am leaning towards cams. On the other hand I'm being advised on getting the MAPecu3. Anyone have any experience with it?

                Originally posted by techno550 View Post
                http://www.trmtuning.com/?product=tr...nce-software-2

                S50 US cams would be a great addition. Not required though. Make specific notes on what you have.
                Cheers for the link! Unfortunately nothing there for non vanos. I have messaged mark d (spelling?)

                thanks for the advice :up:
                .................................................. ...................sigpic
                .................................................. ............................. ......M50B25 3.1L stroker

                Comment

                  #9
                  If you have come this far why not just add vanos?

                  The brain is much smarter

                  The power band is much better with the vanos

                  Sent from my SAMSUNG-SGH-I337 using Tapatalk
                  OBD1 M54/M52TU swap as a M50b25

                  Z4 non powered steering rack fits e30



                  Euro e46 2005/6 320d 6mt gearbox into E30 with M20 hardy and beck 1985 327s engine

                  Comment

                    #10
                    ^Agreed.

                    Vanos gives you a much nicer torque curve. The last M50 3.0l we built used a non vanos head and we added vanos to it.

                    24lb injectors are also overkill unless you are running Schrick / Sunbelt cams and a 3.5 MAF. Get a good rebuilt set of S52 21.5lb pink tops. They're more than enough for a 3.0l with S52 cams.

                    Wouldn't worry about the fuel pump setup unless you monitor pressure and see an issue.

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