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    • CTS Turbos developing Audi EA839 3.0 V6 turbo upgrade - B9 S4 project car

      The EA839 platform will become very popular due to the sheer volume of models with the motor. CTS Turbos is developing a turbocharger upgrade for the EA839 3.0 V6 motor in the B9 S4 which conceivable will carry over to other EA839 3.0 V6 powered VAG products once completed.


      They are not saying or showing much beyond a 68mm turbine and 67mm compressor wheel:

      Quote Originally Posted by CTS Turbo
      Engineering continues on our B9 S4 project, 68mm turbine wheel and 67mm compressor wheel compatibility confirmed in our new proprietary designed turbine housing. You can also see a larger high flow turbo inlet in this photo, which is designed specifically for this turbo. We will undertake a few minor revisions and this will be off to the tooling shop to start making molds.

      Quote Originally Posted by CTS Turbo
      Another bad cell phone pic, this time of a new Turbine housing design for B9 S4. Our B9 S4 compressor housing is currently in the acid bath, it came out of the 3d printer this afternoon. These housings are designed to fit GTX3582R and gtx3584rs, both housing designs have been enlarged over stock and CFD optimized. We hope to test fit this over the holidays
      The more options the merrier as tuning has opened wide up on the platform. We will see what CTS Turbo brings to the table.

      This article was originally published in forum thread: CTS Turbos developing Audi EA839 3.0 V6 turbo upgrade - B9 S4 project car started by Sticky View original post
      Comments 5 Comments
      1. nbrigdan's Avatar
        nbrigdan -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        The EA839 platform will become very popular due to the sheer volume of models with the motor.
        Interestingly the SQ8/7 won't be getting this engine, instead they'll get a detuned 4L: https://www.motor1.com/news/392665/a...america-500hp/

        Sad that they downgraded the engine in the S6/S7 only to reward those who buy huge/pointless SUVs with the better engine.

        It'll be great to have more E839 options, can't wait to see the numbers.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by nbrigdan Click here to enlarge
        Interestingly the SQ8/7 won't be getting this engine, instead they'll get a detuned 4L:
        I thought that was interesting as well. Wonder why? Maybe the SUV's need the torque for towing?

        The SUV's get the better option while the new S6/S7 would be rockets. Just makes the C7 S6/S7 more desirable IMO.
      1. nbrigdan's Avatar
        nbrigdan -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I thought that was interesting as well. Wonder why? Maybe the SUV's need the torque for towing?
        That's what I figured as well. The SUVs weigh so much they probably need the larger engine to actually get going anywhere and to be competitive in the class.

        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        The SUV's get the better option while the new S6/S7 would be rockets. Just makes the C7 S6/S7 more desirable IMO.
        Completely agree.
      1. George@BMS's Avatar
        George@BMS -
        Looks pretty interesting. I wonder if the exhaust housing is any bigger.

        Interesting and strange things are happening across the Audi ranges.

        Europe's facelift S4/S5 is not a diesel with the petrol engine gone.
        New shape S6 and S7 in Europe is now a diesel V6 as well
        SQ6 and SQ7 in Europe is V8 diesel
        Seems in the US the petrol engines have carried on and most likely from S6 and up will have some variant of the V8 twin turbo at different power levels. Lowest output new Gen V8 is current in Panamera GTS at 460hp.
      1. nbrigdan's Avatar
        nbrigdan -
        Click here to enlarge Originally Posted by George@BMS Click here to enlarge
        Europe's facelift S4/S5 is not a diesel with the petrol engine gone.
        New shape S6 and S7 in Europe is now a diesel V6 as well
        SQ6 and SQ7 in Europe is V8 diesel
        Seems in the US the petrol engines have carried on and most likely from S6 and up will have some variant of the V8 twin turbo at different power levels. Lowest output new Gen V8 is current in Panamera GTS at 460hp.
        The move to diesel for the S-range is especially interesting to me because I was under the impression that EU emissions regulations were increasing their focus on particulates, which was why most manufacturers were moving away from diesels. However could it be that ever increasing average fuel economy targets are forcing manufacturers to move to diesels because they see no other realistic way of achieving them?

        It's interesting how legislation often contradicts itself. Constantly increasing safety, particulates, and fuel economy standards all work against each other, causing all these weird compromises.