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    • 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. lughed's Avatar
        lughed -
        Click here to enlarge Originally Posted by Black Sheep Click here to enlarge
        Oh its happening @JRCART will not give up... an it better go down in Chicago
        LOL, i can see. Man this guy is relentless but it isnt going to help make it happen if one party is frightened away
      1. lughed's Avatar
        lughed -
        Click here to enlarge Originally Posted by LostMarine Click here to enlarge
        Sort of, but I know boost is the replacement, but given that when you match the boost, less is still less
        Boost is not a replacement it is an additive
      1. lughed's Avatar
        lughed -
        Actually if there is a replacement it would be efficiency or as it was already stated, more for less
      1. LostMarine's Avatar
        LostMarine -
        Click here to enlarge Originally Posted by lughed Click here to enlarge
        Actually if there is a replacement it would be efficiency or as it was already stated, more for less
        Exactly, boost is efficiency
      1. JRCART's Avatar
        JRCART -
        Attachment 28369Attachment 28370Attachment 28371
        Click here to enlarge Originally Posted by MisterEm Click here to enlarge
        I could get in trouble with that rig. Thanks for sharing.
      1. leo985i's Avatar
        leo985i -
        Your truck is all sorts of sick. I wish I could take that to the desert .
      1. klipseracer's Avatar
        klipseracer -
        Nice truck!

        Also, If its the 1/4 mile, then that does change things a little bit.

        @Sticky I agree, you should protect the engine, your investment and the build over a single race, but I will say that a week ago you said 4 weeks was plenty considering the state of your car and tuning time required for a new platform.
      1. JRCART's Avatar
        JRCART -
        Click here to enlarge Originally Posted by klipseracer Click here to enlarge
        Nice truck!

        Also, If its the 1/4 mile, then that does change things a little bit.

        @Sticky I agree, you should protect the engine, your investment and the build over a single race, but I will say that a week ago you said 4 weeks was plenty considering the state of your car and tuning time required for a new platform.
        Thanks, bet has been 1/4 mile all along, however If I am feeling good I might give him a double or nothing in a 1/2 mile. It appears he is going to be a couple hundred whp down on my CLK so I do not think he has a shot in any type of race. The only race stickys car beat me in is the longets build LOL
      1. JRCART's Avatar
        JRCART -
        Saturday afternoon and nothing is running...looks like next week LOL
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by klipseracer Click here to enlarge
        but I will say that a week ago you said 4 weeks was plenty considering the state of your car and tuning time required for a new platform.
        In my opinion that is plenty of time to get it ready for shift sector.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by JRCART Click here to enlarge
        Saturday afternoon and nothing is running...looks like next week LOL
        Thank you M3 build alarm clock.
      1. JRCART's Avatar
        JRCART -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Thank you M3 build alarm clock.
        Don't mention it....starting to see why this build took 3 years.
      1. Linracing's Avatar
        Linracing -
        Sticky and JCart you two sound like you guys are having a presidential debate lol. ahaha jp So sticky what kit is on your car?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by keikdasneak Click here to enlarge
        So sticky what kit is on your car?
        I only discuss my car with Jrcart's permission.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by JRCART Click here to enlarge
        Don't mention it....starting to see why this build took 3 years.
        We didn't have the benefit of your expertise confusing centrifugal blowers with turbos earlier in the build.
      1. JRCART's Avatar
        JRCART -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        We didn't have the benefit of your expertise confusing centrifugal blowers with turbos earlier in the build.
        I know well enough not to put one on any vehicle I own.
      1. JRCART's Avatar
        JRCART -
        Sticky you dont know how excited I am....Taking candy from a baby.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by JRCART Click here to enlarge
        I know well enough not to put one on any vehicle I own.
        For fear of it being too fast?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by JRCART Click here to enlarge
        Sticky you dont know how excited I am....Taking candy from a baby.
        I really wish you understood it's win-win no matter what.

        But whatever, a little trash talk is fun/fine.
      1. JRCART's Avatar
        JRCART -
        ....and you are already prepping everyone for the excuses when I spank you at Shift Sector....motor needs to break in, we need to work our way up to the big power lol. It is a top speed event, take the gloves of and let the big dog eat. I am going predict 10 car lengths are more at Shift Sector.