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Thread: is there an actual turbo upgrade that will bolt to RS6 manifolds?

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  1. #1
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    is there an actual turbo upgrade that will bolt to RS6 manifolds?

    I have been searching all day and all I can find are dead threads. Mostly people starting build threads saying they are going to do this and that, then 2 pages later its dead...


    I am going to have my car apart for a 6 speed swap, and I want to upgrade the turbos. I don't want to go to the extent of building custom manifolds and all that jazz. That being said, is there a turbo option that will bolt up to the factory manifolds? I see SRM has hybrids but I read they aren't the best made. I also read that the RS6 manifold has the same mount as the 2.7t, If that is the case would running something like gt28s be possible? like these: https://www.atpturbo.com/mm5/merchan...egory_Code=27T

    I understand some custom work will still be required for the turbo inlets and plumbing.

    I cant find any info on this so I appreciate any input.

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    I'm not an expert, but I've done a lot of reading and I'm definitely interested in upgrading my turbos at some point too.

    Generally speaking, the only turbos that are true bolt-on are the "hybrid turbos" available from multiple sources. All of these are essentially stock turbos where the compressor housing is machined to accept a bigger wheel. Nothing is done to the turbine housing, but sometimes the turbine wheels will be clipped to increase flow. The SRM and TTE units fall into this category. There are several other companies that will do the same (Blouch, Scroll, etc...)

    The eliminator kit from ATP will bolt-up to the exhaust manifold, but the inlets won't. You should be able to make them fit with some custom fab work, and I've heard of several people have done similar things on the RS6. The downpipes will probably need to be modified or replaced too, but that should be pretty easy.

    AMD in Seattle is building a car right now with the Tial 880's using stock manifolds, but custom inlets. I believe the 880's are similar physically to the GT28's, but I'm not 100% sure.

    Personally, I'm starting with rebuilt stock turbos, gutted downpipes and a custom tune. Once that is sorted and I'm comfortable that everything is working well, I'm going to start upgrading parts like intercoolers and fuel system, then polish up my welding skills and get the GT2871r Eliminators. We shall see how far I get

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    Quote Originally Posted by GreggPDX View Post
    the only turbos that are true bolt-on are the "hybrid turbos" available from multiple sources. All of these are essentially stock turbos where the compressor housing is machined to accept a bigger wheel. Nothing is done to the turbine housing, but sometimes the turbine wheels will be clipped to increase flow. The SRM and TTE units fall into this category. There are several other companies that will do the same (Blouch, Scroll, etc...)
    Obviously, the first limit is the 5HP24 transmission. Pushing the stock turbos a bit more, we saw 730 lb ft at the crank on the dyno with a so-so tune on pump gas.
    If the transmission limitation is taken car of (or simply ignore), then hybrid turbos should provide enough power to max out the stock block.
    While standard hybrid turbos in deed often only upgrade the compressor ("machined out, larger wheel"), we have also addressed the flow restriction on the hot side. We are using a less restrictive, higher flowing turbine wheel in conjunction with a big (similar to GT2867) billet, extended tip compressor housing/wheel.

    Wondering what power is made with 2871 or Tial 880 (and what trannies are use; even the 01E has its limits, or?)

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    Quote Originally Posted by vtraudt View Post
    Obviously, the first limit is the 5HP24 transmission. Pushing the stock turbos a bit more, we saw 730 lb ft at the crank on the dyno with a so-so tune on pump gas.
    If the transmission limitation is taken car of (or simply ignore), then hybrid turbos should provide enough power to max out the stock block.
    While standard hybrid turbos in deed often only upgrade the compressor ("machined out, larger wheel"), we have also addressed the flow restriction on the hot side. We are using a less restrictive, higher flowing turbine wheel in conjunction with a big (similar to GT2867) billet, extended tip compressor housing/wheel.

    Wondering what power is made with 2871 or Tial 880 (and what trannies are use; even the 01E has its limits, or?)
    Interesting.

    Well I will be pushing the limits if the stick turbos. I'm working with Steve Ken on the swap and nubcake on the tune. When it's all said and done it will have an aeromotive 340 in tank, 044 inline, 750cc injectors and e85. After I see what that does I will look into running the gt2871s.

    At this point I just want to drive the car again lol the auto is basically dead and it's no fun anymore

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    Quote Originally Posted by vtraudt View Post
    Obviously, the first limit is the 5HP24 transmission. Pushing the stock turbos a bit more, we saw 730 lb ft at the crank on the dyno with a so-so tune on pump gas.
    If the transmission limitation is taken car of (or simply ignore), then hybrid turbos should provide enough power to max out the stock block.
    While standard hybrid turbos in deed often only upgrade the compressor ("machined out, larger wheel"), we have also addressed the flow restriction on the hot side. We are using a less restrictive, higher flowing turbine wheel in conjunction with a big (similar to GT2867) billet, extended tip compressor housing/wheel.

    Wondering what power is made with 2871 or Tial 880 (and what trannies are use; even the 01E has its limits, or?)
    Can you elaborate a bit on the turbo you're using? You say you are using a less restrictive turbine wheel, does that mean "clipped"? What else have you done on the turbine side to help flow?

    I was reading a bit about The Turbo Engineers TTE780 which uses an RS6 hotside that is machined to take a larger turbine wheel. They only sell that turbo paired with a modified RS4 cold side, so still not a bolt-on for us.

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    Quote Originally Posted by GreggPDX View Post
    Can you elaborate a bit on the turbo you're using? You say you are using a less restrictive turbine wheel, does that mean "clipped"? What else have you done on the turbine side to help flow?
    The turbo we installed on the RS6 (currently in winter storage, to be tuned in April) has slightly larger diameter and less blades, in a slightly enlarged OEM turbin housing. The compressor is a larger, extended tip billet compressor wheel. Given the transmission limitations, I don't think the turbo will be maxed about. We are not planning to run more that (stock MAP limit) 22 psi boost. We would be very pleased to run run 20 psi to a higher redline (but we had issue when tuning this car with Daz back with stock turbos to get rpm threshold (TCU or ECU) raised IIRC. We were running 18 psi at 6250 at 75% duty cycle.

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    Also, go follow timhaugan on Instagram and check his pictures. He owns the car AMD is building and has posted some pics of the turbos bolted up. Not a lot of details, but you can get an idea of what they are doing. You can also follow fastaudi, that's the account for AMD.

    Finally, you can search rs246.com for info as well. They are focused on cars across the pond, but they have done some interesting builds.

    I have yet to find anywhere that has a good, comprehensive description of a big-turbo RS6 build, but with some research, you can piece together a lot of info. If you decide to go down that path, you can be the first!

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    Tease...

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    When my engine was out and all apart I was very tempted to upgrade the turbos.....but I was already spending too much on the repair to consider it. And I did not want to add a 'new transmission' to the parts list.

    Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

  11. #11
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    Unless you are willing to commit to custom headers or different manifolds, you are stuck with stock compressor housings. As I recall, there is a compressor wheel upgrade, but not sure they are even still doing that? There isn't a lot of room under there for anything huge. I also looked into this when I did my swap and gave up.

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    Quote Originally Posted by ttboost View Post
    Unless you are willing to commit to custom headers or different manifolds, you are stuck with stock compressor housings. As I recall, there is a compressor wheel upgrade, but not sure they are even still doing that? There isn't a lot of room under there for anything huge. I also looked into this when I did my swap and gave up.
    So with a manual transmission gt2871's wouldn't fit? I know some modifications would be needed to get the inlets and charge piping to work correctly. But would they bolt up and fit?

  13. #13
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    This may help.

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    2013 Audi S8

  14. #14
    Registered User ttboost's Avatar
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    It's not just the space limitation. Have you seen your engine out yet? Have you seen how tiny the compressor housing is? And how close it is to the factory manifold? I might have a picture, but I'd have to hunt for it...
    2013 Audi S8

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    So.... With custom work will the GT28rs eliminator kit bolt to the factory manifolds?

  16. #16
    Registered User ttboost's Avatar
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    I don't know what that is, but if it requires using the stock manifolds, it will be a waste of time, IMO. The stock turbos are TINY, both on the exhaust and the intake sides. EVERYTHING on that hot side is too small. Any improvement with factory parts will be minimal. Anyone who has gotten reasonable gains, has started from scratch.
    2013 Audi S8

  17. #17
    Registered User Corbett's Avatar
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    Quote Originally Posted by ttboost View Post
    I don't know what that is, but if it requires using the stock manifolds, it will be a waste of time, IMO. The stock turbos are TINY, both on the exhaust and the intake sides. EVERYTHING on that hot side is too small. Any improvement with factory parts will be minimal. Anyone who has gotten reasonable gains, has started from scratch.

    fake news!

    We made 898WHP on stock manifolds. And a huge wide powerband.

    https://www.youtube.com/watch?v=8SdLSSoKYeQ
    2004 Sportec RS600 + 6MT + e85
    Fastest RS6 in the USA

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    The GT28rs don't use anything but the manifold.

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