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    • New RBTurbo 'Game Finishers' - Two N54 cast turbo options starting at ~$3000

      Rob at RBTurbo is likely joking around with the name but maybe 'GF' will stick for their new cast N54 turbo options. Naming aside RBTurbo quietly developed their N54 cast turbo option and yes units have already shipped.


      How much? Pricing is not set but expect something starting in the $3000 range.

      So what can BimmerBoost tell you?

      There will be two options, one for 575-650whp and another for 650-700whp. They are a 2-piece manifold and housing, a common place amongst the other cast options with the N54. But this is about where the commonalities end.

      The manifold internals (including all 3 runners and collector) are in-house CNC port matched and massaged by RB Turbo to optimize flow out of the manifold without hindering velocity.

      The Stainless Steel High Heat turbine housing volute has been significantly enlarged for a larger frame, and the area at the diffuser onset is also radically improved in size… both via casting design improvements. This is not just a larger manifold and/or collector and forget the rest, but rather the first N54 housing to have a significantly true A/R increase (as very easily identified when laid side by side with the competition). This turbine housing is also machined internally in-house by RB Turbo, to ensure a quality fitment of the Turbine wheel, something that has long been forgotten with other cast offerings with outsourced and extremely poor machining and wheel fitment mismatches.
      As you read, there are two options. In theory that means up to 700 wheel horsepower. BimmerBoost obviously wants to see graphs for both options.

      If you believe the turbine is the same as other options on the market, you are wrong.

      The turbine wheel on the larger option is a custom designed RB piece. It is not the common TD04HL, however a piece that we designed to our own sizes to place an emphasis on what is MOST important which is proper fitment… or in other words optimizing a housings potential and a wheels potential as one. The turbine wheel we have dub’d the RB04XL-9 Blade for the higher powered option, the lower powered option will resume usage of our well proven high flow TD04L-9 Blade turbine wheel.
      That all sounds interesting but again we want to see these perform.

      Anything else?

      The Wastegates are based upon our highly successful Premium RB Stainless Steel High Heat Anti-Wear matched hardware, we machine these 100% in house and they are now newly optimized for the larger housings sporting much larger diameter and longer shafts. These dimensional size improvements add for much more rigidity and surface area to counteract the wear tendencies of the N54 internal wastegates. The actuators will be carried over as all of our past turbos, using the OE units.

      The v-band clamps to secure the manifold to the turbine housing are authentic Tial Stainless Steel units, which we proved with our own sourced Mil-Spec hardware to ensure the highest quality clamping force and hardware retention.

      The compressor housing we source as a virgin casting and we machine it entirely from the ground up to our specs to ensure perfection. This is a true TD04 compressor cover, and is a carry over from our later generation Super RB EVO turbo lineup post January 2017. Our smaller Cast option will be sporting our custom designed 17T Billet compressor wheel while the larger option will be equipped with the ever famous 19T Billet Compressor wheel.

      These units will require a custom high flow outlet, but will work with our Super RB EVO style outlets available in Silicone. Unfortunately while silicone has a very stable home while being used as an inlet, so time has proven, is not always the case with the outlet. This said an Aluminum outlet will be available in the future, although we do not have a timeframe on that. All said we have found our RB EVO Style Silicone outlets to be highly reliable due to the clocking orientations placing the silicone as further possible point away from the hot parts, but an Aluminum outlet would be the icing on the cake for an ever so well thought out complete solution for the N54 and as such we plan on getting that in the works as soon as possible.
      If you want any more details or to get a set, you will need to talk to @Rob@RBTurbo or ask him questions in the thread below.

      Looks like another great cast turbo option is entering the market.










      This article was originally published in forum thread: New RBTurbo 'Game Finishers' - Two N54 cast turbo options starting at ~$3000 started by Sticky View original post
      Comments 120 Comments
      1. iminhell1's Avatar
        iminhell1 -
        Wouldn't you want to show off the custom CNC work?
      1. maxnix's Avatar
        maxnix -
        Nice looking manifolds and wastegates ..... errr .... diverter valves.
      1. blaster3500's Avatar
        blaster3500 -
        I have a set coming in this week and will update as soon as I get the car dialed in. Great looking set of turbos with lots of thought/time spent on them!
      1. Rob@RBTurbo's Avatar
        Rob@RBTurbo -
        Click here to enlarge Originally Posted by iminhell1 Click here to enlarge
        Wouldn't you want to show off the custom CNC work?
        Which part of the custom CNC work you wanting showcased? Compressor housing, wastegate parts, turbine housing, exhaust manifold, etc.? Planned on laying it all out at some point, just haven't gotten around to it quite yet.

        Thanks,
        Rob
      1. Torgus's Avatar
        Torgus -
        Game finishers, go $#@!-yourself, good $#@!ingriddence. Makes me want another n54 so I can bolt these up. Very interesting.
      1. iminhell1's Avatar
        iminhell1 -
        Click here to enlarge Originally Posted by Rob@RBTurbo Click here to enlarge
        Which part of the custom CNC work you wanting showcased? Compressor housing, wastegate parts, turbine housing, exhaust manifold, etc.? Planned on laying it all out at some point, just haven't gotten around to it quite yet.

        Thanks,
        Rob

        Any really.
        I mean that's what sets them apart, show it off. Click here to enlarge
      1. tisdrew2's Avatar
        tisdrew2 -
        So they make less power than the GCs...
      1. CobraMarty's Avatar
        CobraMarty -
        What is the diameter of the port runners?
      1. blaster3500's Avatar
        blaster3500 -
        Click here to enlarge Originally Posted by tisdrew2 Click here to enlarge
        So they make less power than the GCs...
        RB generally rates their turbos where they will efficiently make power not completely maxed out. Also I could be mistaken, but I do not think I have seen a GC dyno over 700 that was not on VTT's dyno.
      1. Rob@RBTurbo's Avatar
        Rob@RBTurbo -
        Click here to enlarge Originally Posted by iminhell1 Click here to enlarge
        Any really.
        I mean that's what sets them apart, show it off. Click here to enlarge
        It is not what sets them a part as a whole, it is more so only the icing(s) on the cake.

        On point though a lot of it is already pictured and discussed above, just have to take the moment to read and view the pictures closely. When we can find the moment to write a more elaborate post we will, and of course get some more detailed pics too. Patience grasshopper.

        Click here to enlarge Originally Posted by tisdrew2 Click here to enlarge
        So they make less power than the GCs...
        In the right hands we are sure they will not make any less power than any other turbos, and more importantly be more inclined to survive the process over the subsequent several months/years. Lots of accolades in these turbos, however from a power only perspective it is in both of the housings which are lightyears beyond what has been known across the N54 universe the past few years. Very large turbo volutes and frame sizes are going to pay large dividends that the N54 has really yet to see; including more power at less boost, less octane needs for x power, less backpressure/reversion, less popped engines, etc.

        Click here to enlarge Originally Posted by CobraMarty Click here to enlarge
        What is the diameter of the port runners?
        Good question. The manifold runners are right about the size of OEM, ~34.25mm. There is absolutely no reason to increase the size of primary runners, an overly large manifold runner (mismatched to the cylinder head port) only helps create a slug for a turbo in response. Or in short there is no restriction in the runners of the manifolds of the N54 engine, so run for the hills if your vendor of choice is trying to sell you on N54 manifold runners being a restriction point (NOTE: The collector size alongside manifold to housing matching is another story altogether).

        However these cast manifolds were found to be quite a bit out of spec internally and thus we developed our own tooling to straighten out the castings via our own internal machine work, including some efforts into the collector area. Over the years we have found this to be the norm, to really just plan on either buying castings in bare form and/or being prepared to "tidy them up" as very seldom are they just ready to go (unless you are just a kick it out of the door type of vendor). Having a full CNC shop certainly has its perks.

        Click here to enlarge Originally Posted by blaster3500 Click here to enlarge
        RB generally rates their turbos where they will efficiently make power not completely maxed out. Also I could be mistaken, but I do not think I have seen a GC dyno over 700 that was not on VTT's dyno.
        Yes on the power ratings, we have a lineup of N54 turbos (Currently 7 options) all the way from OE to 700whp that are designed solely to make the power responsibly and while retaining efficiency and is achievable for nearly anyone who puts any minimal effort into it. Surely they all could make much more than advertised but if more is what you are looking for then there comes a point where you need to make the best decisions to satisfy that hunger prior to making a turbo purchase. Running turbos well out of their efficiency range is just not the smartest thing to do, or in other words it is flirting with disaster in so many ways doing that day in and day out. Also yes it seems to be the consensus on the competitive turbos seldom if ever making very much power anywhere other than on that single vendor controlled dyno. That and/or the turbos grenade in short order thereafter.

        We made some great strides in order to make these turbos the most reliable they could possibly be (more on that later), but there still comes a point where running around at 35psi with junk intercoolers/improper supporting mods/tuning/etc is not going to land you into a happy place for very long. The idea has been to produce a very nice and tastefully designed product that truly meets OEM design standards and thus will actually tolerate some abuse and last some significant mileage in the process.

        Rob
      1. Terry@BMS's Avatar
        Terry@BMS -
        As the N54 turbo world turns. I'll get my popcorn ready. Click here to enlarge
      1. Payam@BMS's Avatar
        Payam@BMS -
        Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
        As the N54 turbo world turns. I'll get my popcorn ready. Click here to enlarge
        LOL, I'm still waiting too.
      1. Rob@RBTurbo's Avatar
        Rob@RBTurbo -
        Click here to enlarge Originally Posted by Terry@BMS Click here to enlarge
        As the N54 turbo world turns. I'll get my popcorn ready. Click here to enlarge
        Click here to enlarge Originally Posted by Payam@BMS Click here to enlarge
        LOL, I'm still waiting too.
        Born ready over here folks, what is being stated is 100% fact, and armed with plenty of pics to illustrate each and every point. So anyone can feel free to bring it.Click here to enlarge
      1. tisdrew2's Avatar
        tisdrew2 -
        Click here to enlarge Originally Posted by Rob@RBTurbo Click here to enlarge
        In the right hands we are sure they will not make any less power than any other turbos, and more importantly be more inclined to survive the process over the subsequent several months/years. Lots of accolades in these turbos, however from a power only perspective it is in both of the housings which are lightyears beyond what has been known across the N54 universe the past few years.
        Accolades...by who? Did you intend on using that word?

        Also, pretty bold and grandiose claim of "lightyears" when both VTT, Hydra, and MMP have upgraded housings. Maybe yours are better/special/more R&D/whatever but uh...650-700whp out of hybrids is the expected range I've seen with the right supporting mods.
      1. Rob@RBTurbo's Avatar
        Rob@RBTurbo -
        Click here to enlarge Originally Posted by tisdrew2 Click here to enlarge
        Accolades...by who? Did you intend on using that word?

        Also, pretty bold and grandiose claim of "lightyears" when both VTT, Hydra, and MMP have upgraded housings. Maybe yours are better/special/more R&D/whatever but uh...650-700whp out of hybrids is the expected range I've seen with the right supporting mods.
        Yes, all has been meant. Also not sure the point of the post or questions it is maybe asking outside of what we have already stated in prior comments, but if you like some other products or feel they have it all figured out then the good news for you is that you are free to purchase whichever you choose.

        PS. If we have to state 1,000+hp turbos to get a consumers business, no thanks simply go buy an ST kit. Otherwise you can take your chances with other vendors that will gladly sell you products claiming potential for goals that will never be met.

        Thanks,
        Rob
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by tisdrew2 Click here to enlarge
        650-700whp out of hybrids is the expected range I've seen with the right supporting mods.
        It isn't fair to make a blanket statement like that.

        On what fuel? What supporting mods? At what boost?
      1. Rob@RBTurbo's Avatar
        Rob@RBTurbo -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        It isn't fair to make a blanket statement like that.

        On what fuel? What supporting mods? At what boost?
        On what dyno? With what corrections? Etc etc it can go on and on.

        And even more important than all of that is that I think he missed the entire last couple paragraphs on post #11 .
      1. richpike's Avatar
        richpike -
        Click here to enlarge Originally Posted by Payam@BMS Click here to enlarge
        LOL, I'm still waiting too.
        Maybe his head exploded? Click here to enlarge Outside of the fact that these sound nice, the clear baiting of Tony made me super excited for this thread, but it has yet to deliver. Click here to enlargeClick here to enlarge

        -Rich
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by richpike Click here to enlarge
        Maybe his head exploded? Click here to enlarge Outside of the fact that these sound nice, the clear baiting of Tony made me super excited for this thread, but it has yet to deliver. Click here to enlargeClick here to enlarge

        -Rich
        This is a sophisticated forum and network of websites for technical tuning details, not tuner drama.

        Click here to enlarge
      1. richpike's Avatar
        richpike -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        This is a sophisticated forum and network of websites for technical tuning details, not tuner drama.

        My bad. Game finished. Click here to enlarge

        -Rich