• 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. LZH's Avatar
        LZH -
        Click here to enlarge Originally Posted by LostMarine Click here to enlarge
        so once Rich disappears, there is a vacancy...?
        LMFAO!!!!!
      1. singletrack's Avatar
        singletrack -
        Click here to enlarge Originally Posted by LostMarine Click here to enlarge
        so no supercharger for your car then?
        Never. I'm sure I will have another turbo car in the future, but not sure what that will be. Spending all my time on my 1978 308 right now : ) Next car may be a classic also...not sure. Garage space and time are the limiting factors right now.
      1. Laloosh's Avatar
        Laloosh -
        Click here to enlarge Originally Posted by singletrack Click here to enlarge
        You can't appreciate the engineering marvel of extracting more from less?
        Nope, hp wins, not more from less. Is that 2.0 240hp s2000 impressive next to 400hp 6.0 gto? Lol no it's not cause it will get its ass handed to it even if the gto misses a gear. Click here to enlarge
      1. benzy89's Avatar
        benzy89 -
        Click here to enlarge Originally Posted by Laloosh Click here to enlarge
        Nope, hp wins, not more from less. Is that 2.0 240hp s2000 impressive next to 400hp 6.0 gto? Lol no it's not cause it will get its ass handed to it even if the gto misses a gear. Click here to enlarge
        Irony -- You can get more out of that Honda S2K with a bolt-on turbo kit then you can with that 6.0L V8 GTO
      1. leo985i's Avatar
        leo985i -
        Click here to enlarge Originally Posted by LostMarine Click here to enlarge
        $#@! your life sounds fun. You sure you don't need a Bodyguard?
        This is too funny bro...I wish too...
      1. Mr.Squeeze's Avatar
        Mr.Squeeze -
        Click here to enlarge Originally Posted by JRCART Click here to enlarge
        ....Hey, don't let Sticky hear you talking like that, it's only Friday afternoon, the week is far from over. We still have Friday night and all day Saturday LMAO!

        Lol yeah there is still time might make it by Saturday night.
      1. JRCART's Avatar
        JRCART -
        Next week..............
      1. singletrack's Avatar
        singletrack -
        Click here to enlarge Originally Posted by Laloosh Click here to enlarge
        Nope, hp wins, not more from less. Is that 2.0 240hp s2000 impressive next to 400hp 6.0 gto? Lol no it's not cause it will get its ass handed to it even if the gto misses a gear. Click here to enlarge
        I only race on the track these days; just getting out is a win. As far as competition goes, I got my fill a long time ago in a variety of forms. I really have nothing left to prove...even to myself. Just looking for different experiences now. So while I can appreciate your point of view, I would suggest that you will eventually mature out of it. Ask JR why he has a .9L vehicle while he also has one of the fastest Mercs in the world. Same reason video games become less fun when you have the cheat codes.
      1. benzy89's Avatar
        benzy89 -
        Click here to enlarge Originally Posted by singletrack Click here to enlarge
        Same reason video games become less fun when you have the cheat codes.
        That is HIGHLY debatable. Grand Theft Auto is SOOOO much better with cheat codes
      1. singletrack's Avatar
        singletrack -
        Click here to enlarge Originally Posted by benzy89 Click here to enlarge
        That is HIGHLY debatable. Grand Theft Auto is SOOOO much better with cheat codes
        Ok noclip + god mode on Doom. How's that for a blast from the past? ; )
      1. MisterEm's Avatar
        MisterEm -
        Click here to enlarge Originally Posted by JRCART Click here to enlarge
        Well I would love to post a pic or two but it will not let me, not sure what is going on, maybe Sticky locked down my account.

        It is a silver 2011 6.2L Super Crew, Long tube headers, cat delete, Stainless Works full exhaust, SCT tune, AFE intake, McNeil fiberglass widebody front fenders, full ADD bumpers, skids and bed mount spare, King Racing Suspension and billet arms, 37" MT's on 17" Method beadlocks and I actually use it for off-roading LOL. I have run Barstow to Vegas a few times and some AZ to western TX runs as well.

        I could get in trouble with that rig. Thanks for sharing.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by JRCART Click here to enlarge
        Because he is not going to be able to get a 4 liter spinning as fast as a little Honda 2.5 therefore more displacement is needed. There are several ways to make home but hands are tied when you are dealing wit a big V8. Show me a big V8 that revs to 10,000 rpm and don't Tell me an Indy car.
        What are you talking about you don't need to rev to 10k rpm.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by JRCART Click here to enlarge
        You should not have to wait too long to see this race go down, if his car is running this week and broken in next week there will be no delay. My cars will be in California for another 2-3 weeks so we can line up at Shift Sector and then we can head over to Famoso for our 1/4 mile money race.

        After that the ball is in Sticky's court becuase the cars are being shipped back home to Chicago and he will have to come out here to run. My cars have been in California all winter, not my fault his car is not ready tro line up.
        I keep saying it's no problem either way.
      1. Sticky's Avatar
        Sticky -
        Only RPM I need is here:

        Click here to enlarge
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by JRCART Click here to enlarge

        Sticky's problem is I have a MUCH bigger motor and MUCH bigger blower than he does.
        Why you are making this about yourself I have no clue.

        Ok cool, bigger motor and bigger blower you say? Good thing mine is a centri then.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by singletrack Click here to enlarge
        Not to me. I'd much rather driver a slower m3 with the engine it has vs a myriad of other cars that have larger displacement and are faster.

        Someone will always be faster anyway.
        Exactly.
      1. JRCART's Avatar
        JRCART -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Is that a turbo??? Thought this was a SC build?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by JRCART Click here to enlarge
        Is that a turbo??? Thought this was a SC build?
        This says it all, doesn't it folks?
      1. JRCART's Avatar
        JRCART -
        ah....centri
      1. JRCART's Avatar
        JRCART -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        This says it all, doesn't it folks?
        I did not know what type of system you were going with, just expected to see a twin screw