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Bp-Swap into 1997 MX-3 16V

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    Bp-Swap into 1997 MX-3 16V

    Hi,

    I need some help, because nobody here in Germany did such a swap before.
    I've got a 1997 MX-3 16V (B6D) with 107HP.
    I want to swap this engine to a BP from a 1991 323 GT (Familia) with 128 HP.
    Is it possible? Are there any problems I could get?
    What is about the electronic?

    Could you also explain the difference of the 1st and the 2nd generation BP to me?

    Is it right that I have to solder cable-color from the automotive wiring harness of the engine to the same cable-color of the automotive wiring harness of my MX-3? I'd like to use the ECU of the BP.

    And one question to the transmission: I'd like to use the F-tranny of my MX-3, because I have an electronic speedo, the BP-transmission has a mechanical speedo. Would it work, when I use my F-tranny, my MX-3 1.6 clutch and flywheel?

    Thanks for any helpful answer!
    Tom

    Last edited by MX-3-Tom; 03-03-2008, 04:49 AM.
    www.mx-3-tom.de
    www.mx-3-community.de

    #2
    the only problem you might have with the bp you chose is that it is likely the small nose crank, if you find a large nose crankshaft and crank pulley you can put that in the engine instead it is a better crankshaft.

    the second gen bp uses either a hybrid obdII system or a full obdII system since you are a 97 mx-3 i'm assuming it is obdII also so that is another reason you might want to consider a second gen bp
    although if you replace the ecu with a first gen ecu and all of the wiring then it shouldn't be an issue. there are some slight differences with the two bps not a lot but i think the first gen is a little stronger

    you can use the fseries from your mx-3 and if you do you have to use the flywheel and clutch from the mx-3. just remember that the f series isn't as strong so eventually the bp will over power it if you do any work to the engine to get my hp out of it

    hope this helped a little
    In the Garage
    Black 93 MX-3 GS
    Bp powered
    GTR Drive Train


    The ProjectMx build thread
    MyCardomain[/SIZE]

    "Shut up, at least the bunnies are on fire!"

    Comment


      #3
      Thanks for answering!

      I asked some guys from Germany an the say, I can modify the harness, so that I can use the first gen BP in my 1997 MX-3.
      What is the advantage of the OBDII?

      And about the crankshaft: What is the advantage of the long nose crankshaft? Which BPs have this long nose crankshaft?
      www.mx-3-tom.de
      www.mx-3-community.de

      Comment


        #4
        sometime in 1992 i think they started the larger nose crankshaft
        advantage of the long or big nose crank shaft is that you can use a lighter pulley, it is a much stronger nose less chance of breaking it if you ever go turbo or add a lot of power and easier to find a underdrive pulley for it if you want

        obdII is bad for performance but good for easily knowing what is wrong with the engine
        In the Garage
        Black 93 MX-3 GS
        Bp powered
        GTR Drive Train


        The ProjectMx build thread
        MyCardomain[/SIZE]

        "Shut up, at least the bunnies are on fire!"

        Comment


          #5
          Hmm....the BP 2nd gen is the one with 114 HP?
          But is it profitable to change the 107HP 1.6 to a 114HP 1.9?

          About the crankshaft: I'm not planning to install a turbo, so I think the short nose crankshaft is okay.
          www.mx-3-tom.de
          www.mx-3-community.de

          Comment


            #6
            yeah unless you are going for high hp don't sweat it

            not sure if you know it but the 1.6 is the exact same engine as the miata 1.6 so all the upgrades for the miata you can use, i put a 2" exhuast on my 1.6 and did an intake put the battery in the trunk and that thing rocked on the autox track, and i could have done tons more
            In the Garage
            Black 93 MX-3 GS
            Bp powered
            GTR Drive Train


            The ProjectMx build thread
            MyCardomain[/SIZE]

            "Shut up, at least the bunnies are on fire!"

            Comment


              #7
              You would mean, that I also can optimize my 1.6?
              But I think, it would be a very expensive way to get more power.
              Also my 1.6 need some oil now and I don't know why. It's not very much, round about 0,3l/1000km.
              This is the reason why I want to get the BP into my MX.

              I've got another question:
              Does the axhaust maifold of the BP fits the three-way catalytic converter of my 1997 MX-3?

              Could you also give me some hints, how I have to chance the harness of the BP gen. 1, so that it would work in my car?

              Thanks!
              Last edited by MX-3-Tom; 03-03-2008, 05:18 PM.
              www.mx-3-tom.de
              www.mx-3-community.de

              Comment


                #8
                you'll have to make a custom exhuast to bolt it up to the converters, and i have no idea how to do the wiring for changing your car from a 97 b6 to a early 90's bp

                you can't drop a bp in without rebuilding it, the engine won't be trustworthy

                here is some advice if you stick with a b6
                rebuild it
                put in higher compression pistons
                get a larger exhuast
                ram air or cold air intake
                arp head studs
                open up your ports
                larger stainless steel valves
                throttle body coolant bypass
                even doing just a few of these things will put your current engine a decent amount higher hp than the bp
                In the Garage
                Black 93 MX-3 GS
                Bp powered
                GTR Drive Train


                The ProjectMx build thread
                MyCardomain[/SIZE]

                "Shut up, at least the bunnies are on fire!"

                Comment


                  #9
                  The BP I'll install got new pistons-rings and the cylinders were crinded 2000 miles ago. Completely it has a mileage of 38.000 miles.

                  What would the modifications for the B6 cost you advise me?
                  www.mx-3-tom.de
                  www.mx-3-community.de

                  Comment


                    #10
                    $? put in higher compression pistons
                    $200 custrom header back exhaust
                    $30 ram air or cold air intake
                    $130 arp head studs
                    $30 open up your ports, DIY port and polish, i can send you the instructions
                    $? larger stainless steel valves
                    $5 throttle body coolant bypass, just need to buy some hose

                    i'm not sure how much the pistons would cost i'm sure you could get some for around a few hundred and the valves for around 100 i think all of that together you'ld likely have around 130 - 150 hp at the wheels easily
                    In the Garage
                    Black 93 MX-3 GS
                    Bp powered
                    GTR Drive Train


                    The ProjectMx build thread
                    MyCardomain[/SIZE]

                    "Shut up, at least the bunnies are on fire!"

                    Comment


                      #11
                      OBD2 to OBD1 isnt that hard, that is if you have some wiring knowledge. You will need all the BP engine wiring harness and ECU. Just wire the dash components into the OBD1 ECU and harness.
                      Mx3 RS,BP-turbo
                      http://www.cardomain.com/ride/2628805

                      Comment


                        #12
                        Thats all? Only soldering the dash hasrness of MX-3 color to color into the engine harness of BP?
                        www.mx-3-tom.de
                        www.mx-3-community.de

                        Comment


                          #13
                          @projectmx:
                          I have got a questions to your hints to build up the B6:
                          Where could I get these parts?
                          Are the pistons and Valves you mean oversized?
                          Do I need an optimization of the ECU after this changes?
                          www.mx-3-tom.de
                          www.mx-3-community.de

                          Comment


                            #14
                            just search online for the pistons and valves, you can also go to corkspot, flyin miata and even ebay for parts, corksport might have the valves for a good price
                            In the Garage
                            Black 93 MX-3 GS
                            Bp powered
                            GTR Drive Train


                            The ProjectMx build thread
                            MyCardomain[/SIZE]

                            "Shut up, at least the bunnies are on fire!"

                            Comment


                              #15
                              Originally posted by MX-3-Tom View Post
                              Thats all? Only soldering the dash hasrness of MX-3 color to color into the engine harness of BP?
                              Kinda like that, but not color for color. You will need wire diagrams so as to match up the component wires. But dont be afraid to do some wire work. Once you get into it, it isnt that hard.
                              Mx3 RS,BP-turbo
                              http://www.cardomain.com/ride/2628805

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