• 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. JakeB's Avatar
        JakeB -
        It sucks that it has to come to that but, I can't say I will miss him. I am all about busting balls but there is a line! That being said I can't wait to see your car all done it's going to be sick!!

        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Ya you would think so but it's fine he's not in this thread any longer and never will be.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by JakeB Click here to enlarge
        It sucks that it has to come to that but, I can't say I will miss him. I am all about busting balls but there is a line! That being said I can't wait to see your car all done it's going to be sick!!
        I could care less about him I'm concerned about my car. Anything else is irrelevant.
      1. nafoo's Avatar
        nafoo -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I could care less about him I'm concerned about my car. Anything else is irrelevant.
        Me too. How's the tuning coming along?
      1. Sparky68's Avatar
        Sparky68 -
        That took some reading, had to spread it over 2 days! $#@! me i thought the $#@! fights in our pits were bad!
      1. Sparky68's Avatar
        Sparky68 -
        Click here to enlarge Originally Posted by nafoo Click here to enlarge
        I'm soooo close!
        Have one on me
      1. Sparky68's Avatar
        Sparky68 -
        Click here to enlarge Originally Posted by ecampbell Click here to enlarge
        Tks bu no props, rep me so I can get back some of the rep points. Loss from Joe's hand!!!
        repped
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by nafoo Click here to enlarge
        Me too. How's the tuning coming along?
        91 octane is done and a new HP record. Problem is with more power than that currently but we'll figure it out after a chat with SSP.
      1. THATDONFC's Avatar
        THATDONFC -
        Sounds like someone has some splanin to do.
      1. benzy89's Avatar
        benzy89 -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        91 octane is done and a new HP record. Problem is more than that currently but we'll figure it out after a chat with SSP.
        Please don't say you fried the clutch pack after some dyno pulls & break-in driving Click here to enlarge
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by benzy89 Click here to enlarge
        Please don't say you fried the clutch pack after some dyno pulls & break-in driving Click here to enlarge
        No, impossible.
      1. PEI330Ci's Avatar
        PEI330Ci -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        91 octane is done and a new HP record. Problem is with more power than that currently but we'll figure it out after a chat with SSP.
        Have you chosen a point where you'll stop development and just drive it for a bit?
      1. MisterEm's Avatar
        MisterEm -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        91 octane is done and a new HP record. Problem is with more power than that currently but we'll figure it out after a chat with SSP.
        A bit confused with this cryptic statement... Click here to enlarge

        From this thread I learned that SSP only dealt with the hardware, and Gintani dealt with the logic and DCT tuning. If you have to contact SSP again - based on this first assumption - are you implying a hardware roadblock in the pursuit of more power?

        Click here to enlarge Originally Posted by PEI330Ci Click here to enlarge
        Have you chosen a point where you'll stop development and just drive it for a bit?
        Good point.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by PEI330Ci Click here to enlarge
        Have you chosen a point where you'll stop development and just drive it for a bit?
        Yes, when it works.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by MisterEm Click here to enlarge
        From this thread I learned that SSP only dealt with the hardware, and Gintani dealt with the logic and DCT tuning. If you have to contact SSP again - based on this first assumption - are you implying a hardware roadblock in the pursuit of more power?
        Yes.
      1. MisterEm's Avatar
        MisterEm -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Yes.
        Since this is the DCT build thread, can you elaborate on the transmission/clutch/DCT roadblock?

        The DCT build is *IMO* the most unique and interesting part of the build. I doubt I am the only reader sharing that opinion.
      1. Commanderwiggin's Avatar
        Commanderwiggin -
        DCT info is valuable
      1. ZooyorQ's Avatar
        ZooyorQ -
        Click here to enlarge Originally Posted by MisterEm Click here to enlarge
        Since this is the DCT build thread, can you elaborate on the transmission/clutch/DCT roadblock?

        The DCT build is *IMO* the most unique and interesting part of the build. I doubt I am the only reader sharing that opinion.
        I'd love to hear more about the road blocks.

        Click here to enlarge Originally Posted by Commanderwiggin Click here to enlarge
        DCT info is valuable
        Agreed
      1. pcockley's Avatar
        pcockley -
        well since the banter has gone i guess the only reason to keep coming back to this thread IS for DCT info, so come on stick spill Click here to enlarge
      1. benzy89's Avatar
        benzy89 -
        Sticky --- How's the break-in/low boost going? Can we expect a full write up once everything's confirmed for 100%
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by benzy89 Click here to enlarge
        Sticky --- How's the break-in/low boost going? Can we expect a full write up once everything's confirmed for 100%
        The break in and low boost isn't the problem. The problem is the SSP clutches currently and it is not software related, it's hardware. We'll see what happens but I honestly would be better off with the stock clutch packs at this point. What a nightmare.