• DCT Build Part XII - Build complete, pictures of final assembly, transmission cooler, and Viton seals

      Well, this has been a rather lengthy road to completion but the transmission is basically complete. The car was dropped off by SSP last month to Gintani who should have the motor in by the end of this week. The problem is SSP mounted their trans cooler in the location the heat exchanger for the supercharger needs to go so SSP will need to come to Gintani's facility to re-run their lines as the cooler will need to go in a different location. What took so long for this update? Well, we have been waiting, and waiting, and waiting for SSP to send us details on the Viton seals that required 3 redesigns but never received the information on why these seals are superior to the stock units.

      So, I decided to do my own research and here is what I came up with. These are the stock BMW seals used in the DCT. What is wrong with them exactly? We do not know other than they apparently are not up to the task:










      Here are the Viton seals which delayed the project by 3 months. Viton is a synthetic rubber used for seals, O-rings, things of that sort. Viton was likely used as it is less susceptible to decay and already used in BMW applications such as in VANOS. Viton has much higher temperature and chemical resistance characteristics than the stock seals. Here is what they look like:










      This is the DCT cooler that was mounted by SSP up front. This needs to be moved somewhere else as the supercharger heat exchanger will need to go there. This means SSP will need to come out and run their lines again checking all their fluids and so forth before tuning can take place:














      This is the final assembly. So, the transmission is built but it took about a year longer than estimated. I believe I was as patient as possible and hopefully this will all be wrapped up in December with a built motor, built transmission, a YSI, and a ton of horsepower.





































      This article was originally published in forum thread: M3 DCT Build Journal - World's First BMW DCT Build started by Sticky View original post
      Comments 2372 Comments
      1. Sticky's Avatar
        Sticky -
        Reaching the end of the road guys. I'll have more updates in a couple weeks just waiting on something to come in. Tentatively I would expect break in late this month.

        When this is all said and done, you'll get a nice writeup and what and why took so long. I know you think it's simple, but these motors have been a hell of a learning process. I learned a lot myself about the S65 and it's strengths and weaknesses.
      1. Torgus's Avatar
        Torgus -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Reaching the end of the road guys. I'll have more updates in a couple weeks just waiting on something to come in. Tentatively I would expect break in late this month.

        When this is all said and done, you'll get a nice writeup and what and why took so long. I know you think it's simple, but these motors have been a hell of a learning process. I learned a lot myself about the S65 and it's strengths and weaknesses.

        waiting on a cf driveshaft?
      1. benzy89's Avatar
        benzy89 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Reaching the end of the road guys. I'll have more updates in a couple weeks just waiting on something to come in. Tentatively I would expect break in late this month.
        Delayed Merry Christmas
      1. Eric335's Avatar
        Eric335 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Reaching the end of the road guys. I'll have more updates in a couple weeks just waiting on something to come in. Tentatively I would expect break in late this month.

        When this is all said and done, you'll get a nice writeup and what and why took so long. I know you think it's simple, but these motors have been a hell of a learning process. I learned a lot myself about the S65 and it's strengths and weaknesses.
        Cant wait to see what youve created. Any mid-build photos?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Torgus Click here to enlarge
        waiting on a cf driveshaft?

        No that will come later.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Eric335 Click here to enlarge
        Cant wait to see what youve created. Any mid-build photos?
        Nothing to show right now unfortunately. Just know we are almost there.
      1. fastgti69's Avatar
        fastgti69 -
        I'm ready bro.
      1. leo985i's Avatar
        leo985i -
        Click here to enlarge Originally Posted by fastgti69 Click here to enlarge
        I'm ready bro.
        Think we have all been ready lol
      1. fastgti69's Avatar
        fastgti69 -
        Click here to enlarge Originally Posted by leo985i Click here to enlarge
        Think we have all been ready lol
        I mean to line up with him when the car is ready. I will be ready to lose Click here to enlarge
      1. nafoo's Avatar
        nafoo -
        Update? ;D
      1. Sticky's Avatar
        Sticky -
        Break in within the next two weeks. That's all I got.
      1. bobS's Avatar
        bobS -
        Well that's a pretty good update....
      1. DavidV's Avatar
        DavidV -
        Click here to enlargeClick here to enlarge
      1. Sticky's Avatar
        Sticky -
        Patience people.
      1. inter1032's Avatar
        inter1032 -
        what are you waiting on them to finish exactly?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by inter1032 Click here to enlarge
        what are you waiting on them to finish exactly?
        I changed something. Something important.
      1. fastgti69's Avatar
        fastgti69 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I changed something. Something important.
        Please have this car ready. PLEASE. I need a ride in it on the airstrip. I deserve one! LOL
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by fastgti69 Click here to enlarge
        Please have this car ready. PLEASE. I need a ride in it on the airstrip. I deserve one! LOL
        I ​deserve one...
      1. PEI330Ci's Avatar
        PEI330Ci -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I changed something. Something important.
        Twin Turbo w/nitrous?
      1. Sorena's Avatar
        Sorena -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I changed something. Something important.
        N54 under the hood? Cool. Click here to enlarge