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    • A visit with CP-E at SEMA - Pictures of prototype N54 twin turbo upgrade

      BimmerBoost stopped by the CP-E (Custom Performance Engineering) booth at SEMA 2011. What immediately caught our attention was the N54 twin turbo upgrade prototype they had on display. We asked a lot of questions but did not really get any concrete answers. Basically, this is going to go on their shop car. There will be two different turbo options the smaller of which should bolt in and the larger turbos requiring permanent modification to the engine bay / chassis to make them fit. Do not expect these until Summer next year although they were talking maybe even Spring.

      How about the tuning? Well, the Standback was suggested for it. As far as fuel to support 700+ horsepower goals there were not really any answers but secondary injection was suggested along with a new HPFP (high pressure fuel pump). We know everyone is going to be following this closely to see what comes of it and we wish CP-E the best with this project which is obviously at very early stages.

      The entire product offering is pictured and pictures were taken of all the CP-E BMW products that were on display. This includes the N54 blow off valve kit, N54 downpipes, dual cone intake, N54 FMIC, N55 downpipe, and their 1M exhaust.





























      This article was originally published in forum thread: A visit with CP-E at SEMA - Pictures of prototype N54 twin turbo upgrade started by Sticky View original post
      Comments 93 Comments
      1. fundahl's Avatar
        fundahl -
        Click here to enlarge Originally Posted by Rob@RBTurbo Click here to enlarge
        I do agree with a ragged edge tune, race gas, friendly dyno, optimum conditions, all supporting mods, and for all they are worth, etc etc Glory Run... they should be able to achieve 550-575rwhp. I've said this for years regarding RBs, and am confident ASRs and TD2s are capable as well. I am just saying there is nothing more to do, and they are what they are... running around saying you are doing this or that is not going to change some fundamental facts of what hardware remains. So until he says he is replacing the whole turbo, there is not much value in discussing anything further about other minor changes. Hybrids are nice, they have their place that appeals to the majority of the folks out there who like their low end and quick spool and power increase at a fair price... but there comes a point when you seriously just have to realize they are only capable of so much.
        Now if we could only have the best of both worlds and get a compound turbo setup on the N54. Click here to enlarge
      1. turugara's Avatar
        turugara -
        So....

        I know this is pretty much an n54 turbo upgrade thread.

        Thought it'd be cool to point out that this specific downpipe is in my car Click here to enlarge

        Attachment 15080

        Ok discussion resume...
      1. xbox_fan's Avatar
        xbox_fan -
        Can someone please create a upgraded twin turbo kit for the N54, for us that isn't drag racers and dont want to sacrifize response. It is a BMW the reason they didnt get turbo charged earlier was throttle response going down the drain. The N54 was/is a ok compromise but it cannot get much laggier than it is stock without being quite pointless (there is tons of big turbo good $/hp alternatives out there).

        HPF did one for the E46 M3, please create one for the N54 as well Click here to enlarge
      1. lamia2super's Avatar
        lamia2super -
        i just want to go fastClick here to enlarge
      1. oddjob2021's Avatar
        oddjob2021 -
        Click here to enlarge Originally Posted by Rob@RBTurbo Click here to enlarge
        I do agree with a ragged edge tune, race gas, friendly dyno, optimum conditions, all supporting mods, and for all they are worth, etc etc Glory Run... they should be able to achieve 550-575rwhp. I've said this for years regarding RBs, and am confident ASRs and TD2s are capable as well. I am just saying there is nothing more to do, and they are what they are... running around saying you are doing this or that is not going to change some fundamental facts of what hardware remains. So until he says he is replacing the whole turbo, there is not much value in discussing anything further about other minor changes. Hybrids are nice, they have their place that appeals to the majority of the folks out there who like their low end and quick spool and power increase at a fair price... but there comes a point when you seriously just have to realize they are only capable of so much.
        i guess time will tell, as always. but since it seems this discussion/thread will be cast into the graveyard without new posts i figured i'd respond. and afaik, everything on the (turbo) upgrade is being replaced/(re)machined, the only things staying the same are the exhaust housing and the turbine. otherwise i completely agree with your statement. these upgrades are capable of only so much, that amount is due to change when modifications are completed and tested.
      1. Sorena's Avatar
        Sorena -
        Click here to enlarge Originally Posted by turugara Click here to enlarge
        So....

        I know this is pretty much an n54 turbo upgrade thread.

        Thought it'd be cool to point out that this specific downpipe is in my car Click here to enlarge

        Attachment 15080

        Ok discussion resume...
        WTF is that? That's some huge ass downpipe!!! I guess 5", right?
      1. Forced Air's Avatar
        Forced Air -
        Click here to enlarge Originally Posted by SlicktopTTZ Click here to enlarge
        Now if we could only have the best of both worlds and get a compound turbo setup on the N54. Click here to enlarge
        Wouldn't that be the ish....
      1. Eleventeen's Avatar
        Eleventeen -
        Click here to enlarge Originally Posted by oddjob2021 Click here to enlarge

        indeed the 10T wheel is quite large for the stock turbine. this is why torque drops like a rock on stock units when you tune and try to extract more power, the compressor does well, but the turbine falters. the turbine cannot flow what the compressor and engine can. asr's upgrade, just like rb's, has a larger turbine. the turbine to compressor ratio is less than that of stock (at least on asr's). with the new comp. wheel the ratio will be almost identical to stock, however both are bigger because the turbine is bigger, make sense? the way he explained it to me is the turbine has a chunk of room left on it, that the compressor is slightly too small (few mm's). just clarifying info for those members that are not as familiar with turbo talk. if you think i'm beating a dead horse that's fine, i'm quite happy to leave this discussion where it is and wait for the numbers. if asr cannot make much more than 540-550 i would be more than willing to take back all i've said and apologize for the high hopes amounting to nothing. now my question to you is would you do the same if they reach the goal i've stated? would you say all that you posted pertaining to this matter was incorrect and misinformed, etc etc? somehow i doubt it.
        I'm not saying that you are beating a dead horse, BTW; I think ASR is actually beating a dead horse. I imagine they can fit a bigger turbine wheel, but the turbine housing itself seems too small to get any more worthwile gains. I think RB, ASR, etc. have done all they can with that turbine housing. There are companies that can custom cast turbine housings if they are hell-bent on keeping the stock fit and appearance intact. Personally, I don't think it would be worth the extra cost.

        Here's my idea (and being that Rob is the resident expert on the 3000GT turbos, his feedback would be appreciated): I would love to affix an upgraded TD04-9b turbo to our manifolds. I would probably go with the TDO4H upgrade on the exhaust side, and a 15T or 16T compressor wheel. I think in the TD04 housing (I believe it is a 5cm2), this combination would not only flow tons of power, but they would actually fit in the stock locations. You would have to modify DP's and intake tubes, so not something that would be highly marketable, but I think it would be a great cost effective custom project. If you wanted to go balls out, you could probably do a TD04HL-19T.
      1. oddjob2021's Avatar
        oddjob2021 -
        Click here to enlarge Originally Posted by Eleventeen Click here to enlarge
        I imagine they can fit a bigger turbine wheel, but the turbine housing itself seems too small to get any more worthwile gains.
        i think you misinterpreted what i wrote. when i said 'the turbine has a chunk of room left on it' i didn't mean the turbine housing has room left to be bored out further and for a larger wheel to be used, i was referring to the current turbine wheel, and that it has room left for more exhaust to flow without creating back pressure. the turbine and housing are staying the same, for better or for worse, afaik. it is every other piece of the 'upgrade' that is being either replaced or re-machined, including of course the new, larger, billet comp wheel. otherwise your reply seems sound. i would also be interested in what rob has to say on the matter. how he could possible have a sort of 'high-output' version for a slightly higher cost that produces more power at the same boost level.
      1. Eleventeen's Avatar
        Eleventeen -
        Okay, I did misunderstand then.

        It would be impressive if they could wring even more HP out of those turbos.
      1. Rob@RBTurbo's Avatar
        Rob@RBTurbo -
        Eleventeen, RBs are a TD04L-15T... No bigger wheels will fit in either housing without significantly damaging the housings rendering them worthless.

        And yes, if you tried to cut off the turbine housings off any other native TD04 Turbine housing you will have substantial work cut out for you. The OEM N54 Boysen Manifolds outlet VERY close to the block, so you'd have to be creative to get any other turbine housing to be placed in the correct area/geometry to work with any other of the components (including not interfering with the block). It would drive you into a total redo of the whole system. It would be a complete disaster, especially any attempt to do it on more than a one off basis. You are correct in that the induction tubes would not work, the downpipes would not work, the oil feeds/returns and coolant feeds/returns would not work. And that is after you got the turbos to mount and clearanced everything to make them fit. Unfortunately you move one thing around on this car, you are in for a ton of work.

        I do agree about the TD04HL-19T, I have built many of them and it is the perfect size for a 3L all around. Man that would be an AWESOME turbo for this car and I would've built it already if there was a way to build one and be repeatable for a fair price. But as I said, it would require replacing damn near everything which would be much bigger $$$$$.

        I could probably build a TD04L-19T and make it work using a bigger compressor housing, but I really don't like that match of wheels. I have done them before and they work well, but in a slightly bigger turbine housing so its not really the same thing as applied on the N54.

        The match I use currently is the biggest that can be done, and compressor to turbine is a perfect match. Its just the cleanest match of components to use all around to install easy, gain a good improvement in power, and keep costs low as possible- even if it is a complete disaster to make it all work in itself at least to the end user its pretty straightforward.

        Rob
      1. bmw335iguy's Avatar
        bmw335iguy -
        just saw this over at cobbs website:

        Milestones

        2012
        • AccessTUNER Pro Speed Density Released for 2.5L Turbocharged Subarus in January.
        • CP-E Selects COBB Tuning AccessPORT as Primary Engine Management Solution for MAZDASPEED and BMW.


      1. dzenno@PTF's Avatar
        dzenno@PTF -
        Ohhhh now that's interesting Click here to enlarge wonder if those Disco Potato TWINS and that sick ass manifold will make it on a test car soon...that'd be a total dream setup....(saliva dripping uncontrollably)..

        730 wheel with superb low end spool as well as top end power and a nice flashy flash with a JB4 meth boost safety wired in...done and done!