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How to make your B9 RS4 sound like a B8 for £20..

Addict Jun 6, 2018

  1. Addict

    Addict Well-Known Member

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    Ok so that’s not strictly true… however…

    I was at the Listers Audi Experience day last week and got chatting to a few technicians about the RS4 exhaust note, the new regulations, how it will affect cars in the future and so on. All very interesting but that’s a longer conversation and I haven’t got time for that right now..

    However, we got on to the big debate about the new RS4/RS5 engine and the lack of grunt after the B8. So whilst not strictly recommended, they suggested just disconnecting the valves on the exhaust and turning off the ‘sound actuator’ – yes gentlemen, the myths are true. There is indeed sound pumped into the car to make up for the lack of noise from the exhaust!

    So a quiet word in someone’s ear and a £20 note later.. I have the valves always set to open (this overrides Comfort, Dynamic etc) and the sound actuator turned down to 20%, although will probably get this turned off completely.. and boy what a difference this makes!

    So of course it's no V8... but it now sounds (and feels!) like a completely different car, with a very deep rumbly poppy exhaust no matter what settings you are in.

    I have done a few hundred miles on the motorway now in it also, and it’s all fine and dandy. Yes there’s some ‘drone’ but to me it just sounds like an RS4 is meant to sound. The only downside, is the exhaust note has so much deep base now, that you don’t want to be leaving too many bits and bobs and coins lying around in the car!

    But, I think I can live with that with the improvement to the sound. More testing to be done yet but so far so good. You can also of course switch it into individual and change the engine to ‘Comfort’ whilst doing motorway miles which knocks the revs down over so slightly.

    It’s in 8th gear around 60-70mph when you get the most base out of it and you hear your change rattling a bit. But other than that, it now feels like a different car with a very raw RS feel to it. It also feels faster too! I just got just over 30mpg out of it on a 100 mile drive also, so not too bad at all.

    The other bonus is it helps me keep more to the speed limit as you really know when you’re going above 90mph.. oh, and it should use less fuel as I wont feel the need to put it into Sport/Dynamic as often to make it rumble and pop any more.. as it’s now got all the grunt it needs in both Comfort and standard Dynamic :)

    This is all a personal thing of course.. but assuming it doesnt rattle itself to bits, I'm no MUCH happier with the RS status of the car.
     
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  3. terminator x

    terminator x Well-Known Member

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    Interesting but why is that any different to dynamic mode 100% of the time eg just switch out of comfort every ignition cycle?

    TX.

    PS when I was at Rockingham, car set to dynamic, I asked a few people what it sounded like ... all said it was almost silent!
     
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  4. Addict

    Addict Well-Known Member

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    it's a good question, and I dont know the answer. But believe me it sounds ALOT different. Pressumably dynamic opens and closes the flaps a bit but doesnt leave them fully open?

    As for the PS... that's exactly why I'm tinkering with mine. It honestly sounds like a different car now!
     
  5. Addict

    Addict Well-Known Member

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    Hard to get the full sound on here but you can still tell the difference in tone?




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  6. Spaceman_RS3

    Spaceman_RS3 Well-Known Member Team Ibis Team Panther Audi RS3 Audi S4 Audi Avant Owner Group

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    Take it in dynamic it’s opens one valve fully then the other at3k revs or something? So with disconnected they are open at the lower revs also. Rs and s cars have run like that for years
     
  7. Addict

    Addict Well-Known Member

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    Yep, precisely that. So you get the nice rumble at low revs without needing to rev the **** out of it


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  8. Evil Derboy

    Evil Derboy Well-Known Member Team Daytona Audi RS5 Owners Group

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    To get the full effect it needs to be in Dyanamic and with the gearbox set to Sport. Which obviously isn’t as fuel friendly and is a bit brutal compared to comfort.

    I disconnected mine and connected them again after a test drive as the drone was too much. Might give it another go but I don’t like the idea of the connectors just being exposed to the elements underneath the car. Would be good if there was a blanking plug or something to protect them.
     
  9. RAF_S7

    RAF_S7 Well-Known Member Team V8 Gold Supporter Team Sepang Audi S7 A7 Owner Group Black Edition

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    There is. A number of the aftermarket exhaust manufacturers make these, mainly to stop the engine management throwing codes (Stored codes, not CEL)

    I’ve been running my S7 without valve control for a couple of years now. Makes a huge difference.

    Just Google “Audi exhaust valve blanking plug”. I use APR ones on mine :racer:
     
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  10. Addict

    Addict Well-Known Member

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    Some insulator tape or a condom probably do the trick also ;) (won’t stop the errors of course but will stop anything from getting wet)


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  11. Addict

    Addict Well-Known Member

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    Just found some RS3 ones... are they car / gen specific?


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  13. Evil Derboy

    Evil Derboy Well-Known Member Team Daytona Audi RS5 Owners Group

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    Found some on ebay £27.49!!! and then you need to get terminators for the loom side. What a rip-off.
     
  14. Addict

    Addict Well-Known Member

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    Pack of condoms it is then


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  15. RGBARGEE

    RGBARGEE Well-Known Member Team Mythos Team Daytona Team Phantom Audi RS3 Audi RS4 Audi S3 Audi A1 Black Edition Navarra Blue Classic

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    IMG_0710.jpg Great cruiser... Does the £20 tip apply to standard and sports exhaust?
     
  16. totoanto

    totoanto New Member

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    Hi

    Nice post.

    I also have the valves always set to open but I don't know how to turn off sound actuator or set it to 20% as you described.

    Can you tell me how you did it?

    Regards,
     
  17. Evil Derboy

    Evil Derboy Well-Known Member Team Daytona Audi RS5 Owners Group

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    VCDS / Carly / OBDEleven. However there’s no need to reduce the Soundaktor level. It only helps inside the cabin.
     
  18. totoanto

    totoanto New Member

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    Thanks for info
     
  19. Evil Derboy

    Evil Derboy Well-Known Member Team Daytona Audi RS5 Owners Group

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    Yes. Both exhausts are the same as far as the flaps are concerned.
     
  20. RGBARGEE

    RGBARGEE Well-Known Member Team Mythos Team Daytona Team Phantom Audi RS3 Audi RS4 Audi S3 Audi A1 Black Edition Navarra Blue Classic

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    Thanks based on a side by side try of RS5 with and without Sport exhaust I decided not to spend £1200 on the later. Just what are the differences to justify £1200 apart from Black tips?
     
  21. Evil Derboy

    Evil Derboy Well-Known Member Team Daytona Audi RS5 Owners Group

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    Just like any exhaust upgrade. Louder and more free-flowing. Not sure what the exact technical make up of either is though to be honest. Personally I don’t like the black tips. Would have preferred chrome.
     
  22. Addict

    Addict Well-Known Member

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    Have a chat to your guys at Audi.. they can do it for you. Or if you have ODB11 you can probably do it with that I would think :)


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  23. oli356

    oli356 Well-Known Member Team Sepang Sportback Audi S3 Black Edition S tronic

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    I was confused by the original post. How does turning off the soundaktor improve sound..... The whole idea is to make the car sound better at least inside ain't it?

    I tried to turn mine off in my S3 while on the move, using carista. Maybe it just wasn't working or it couldn't be done while the car was running but I noticed no difference from 99% and 0%. Then again, if it makes the car quieter... Don't want that.
     
  24. Addict

    Addict Well-Known Member

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    It’s a personal choice thing. Personally I don’t like the fake sound inside the car, hence having it turned down as I prefer just the sound of the exhaust. But if you like it, leave it as it is :)


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  25. nervus

    nervus Well-Known Member

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    Cut the fingers out of a rubber glove - less messy than a Blob!
     
  26. cosmicblue

    cosmicblue Active Member TeamMisano Audi RS4

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    I picked mine up this week and this weekend I'm planning to get OBD11 in there and turn down the fake sound.
     
  27. cosmicblue

    cosmicblue Active Member TeamMisano Audi RS4

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    So now I have the SoundAktor turned off (OBD11). I have the Sports exhaust option with the Drive Select option for the engine sound set to Dynamic.

    When the car is in S mode the exhaust is definitely more throaty - I'd like that exhaust tone when Drive Select is set to Comfort...

    https://www.k-electronic-shop.de/MotorSoundPlus/AUDI-RS4-B9-8W-Auspuff--Abgas--Klappensteuerung-per-drive-select-AVC.html

    XE.com indicates a £384 price tag - but does link directly to Drive Select - no remote required. I'm tempted... Google Translate of the web page below:

    " Are you not satisfied with the sound of the factory valve control of your AUDI RS4 B9 8W?

    The sound you don't like because not enough control on the part of AUDI or "arbitrarily" makes this?
    You want to use no "universal" solution without motor protection function?


    This control creates a completely new sound picture!

    Make the exhaust sound easily about the DRIVE SELECT a!
    Without disturbing "External button / remote control" as some competitors offer!
    Take "full control", about your exhaust system!

    Benefits:


    • Press "Quick key" - 2 x ESP = valves open or close
    • simple installation without encoding works
    • at any time without leaving any residue re upgrade bar

    Scope of delivery:
    -1 x AUDI RS4 B9 8W active valve control auxiliary control device
    -2 x adapter cable set exhaust gas FL APS
    -1 x cable set CAN BUS vehicle
    -1 x installation manual (german)


    Installation time: approx. 1 hour


    Product attributes:

    • We provide you here with the proven active valve control / AVC additional electronics to control your valve controlled exhaust system, this is suitable for all AUDI RS4 B9 8W models of all years of manufacture as well as of all exhaust system variants (with ( or without sport exhaust system, etc.).
      • NOT suitable for AUDI S4 B9 8W models - for this you need the item #: 12403
    • This intelligent and very little additional module with ECE mark is as self-sufficient (= independent) system of the vehicle CAN bus controlled and Pre is plugged in the electric exhaust valves.
      • The shoring not traceable (E.g. in the service / TÜV etc.) is there which installation takes place hidden, no error messages/error codes produced the engine and again on "Series" can make the sound even at your fingertips.

    How it works:

    • Control via drive select:
      • The following functions are given about the factory installed drive select:
        • Comfort
          • Both exhaust valves are closed (in the cold)
        • Car
          • Both exhaust valves 100% original - behave like factory.
        • Dynamic
          • Both exhaust valves are permanently open (in the cold)
    • "Speed dial key" controls:
      • You have the option to reverse the flaps in the comfort, as well as in the dynamic mode.
        Which means: ride in the comfort mode with closed doors, had them but like to open? No problem: Press the ESP 2 x in succession to reverse the current flap opening.





    Additional function:
    • Protection of the motor (security feature!)
      • Full load drives with closed exhaust gas FL APs can cause damage, therefore this module to the Security opens both valves at a speed of 4,500 revolutions the engine safely to relieve."
     
  28. terminator x

    terminator x Well-Known Member

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    I have AVC that works like that - comfort always shut, dynamic always open and ESC to open or shut them at will.

    TX.

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  29. cosmicblue

    cosmicblue Active Member TeamMisano Audi RS4

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    Thanks TX - what did you have to buy to achieve that?

    Thanks

    John
     
  30. terminator x

    terminator x Well-Known Member

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    I got mine from Cete Automotive in Germany, supply only and then fitted locally by an Audi specialist. Works perfectly.

    TX.

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  31. cosmicblue

    cosmicblue Active Member TeamMisano Audi RS4

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    Thanks TX - that's the same device. Great!
     
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  32. D0C

    D0C Well-Known Member Team Nardo Team Panther Audi RS3 TTRS

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    Just can't believe how poor the RS4 sounds. A real shame as the car looks great inside and out and obviously goes very well.
     
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  34. terminator x

    terminator x Well-Known Member

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    Single pipe front to back vs RS3 which has 2 of course isn't helping it imho. Allegedly wltp compliant too so that will stifle the sound + pops and bags removed by Audi of course.

    TX.

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  35. Thundercliffe81

    Thundercliffe81 Well-Known Member Team V8 Team Sepang Audi RS4 Audi Avant Owner Group

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    Is 'anyone' offering a dual branch system for this yet? Anybody cracked it? ASG have the best I've heard for the new RS5. But I think they do a back box mod.

    The sound has grown on me quite a bit actually.


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  36. Addict

    Addict Well-Known Member

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    Yep.. after running with the valves unclipped for a while (more grunty but lots of drone and vibration) I'm reluctantly getting my back boxes modded next month and will reconnect the valves. Whilst TX's AVC sounds bang on, I cant bring myself to purchase the valve control also, you really shouldnt have to do all this to an RS4 to make it sound as it should :(

    Let's hope they make the RS6 sound as it should!
     
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  37. terminator x

    terminator x Well-Known Member

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    That's just you getting older ;)

    TX.
     
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  38. Thundercliffe81

    Thundercliffe81 Well-Known Member Team V8 Team Sepang Audi RS4 Audi Avant Owner Group

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    I agree completely. I've just got the Milltek Non Res on my B8. It sounds incredible but the boom with valves open at low revs was too much.

    So! I bought the centre muffler for it thinking I'd find a middle ground. No. Just no. Haha. It's basically a stock volume with complete loss of character and actual audible tone and sound and...still has the boom at low revs valves open.

    So I'm going back to Non Res tomorrow haha. At least it's honest and brings the engine to life. Long story short, stock Audi systems are just so stifling. It's a real shame that we have to hunt for the right sound. As Audi design and performance are what we love.

    I just see AMG getting it right every single time. It's frustrating. Has the sound diminished your joy of ownership? The driving experience I mean?


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  39. Thundercliffe81

    Thundercliffe81 Well-Known Member Team V8 Team Sepang Audi RS4 Audi Avant Owner Group

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    I just fitted a resonator only to realise I want the Non Res (warts and all). There's life in me yet

    I'm struggling to find any decent content on C7 RS6 vs B9 RS4. As they're the two cars I'll look at next. Not gonna go off topic. RS4 performance on British roads would tear the RS6 a new one. But sound and presence are very important to me. I've always kept an eye on threads like this. Just to see if somebody can really make an exciting exhaust. Without drone for the B9.

    The wild card is the new facelift C63S waggon.


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  40. Addict

    Addict Well-Known Member

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    not at all.. i still love it. Hands down the best car I've had.. just annoying you need to mess with it to make it sound right. It will be interesting to see waht the Res Delete does to it next month. At the end of the day, it's still only a 2.9, so it's never gonna sound super rumbly I guess.

    What this does of course mean is I might be jumping ship to an RS6 sooner than I intended to.. but it's odds on, that if the RS4 is anything to go by, they will do something daft to the RS6 also to take away the rumble of the V8 :sadlike:
     
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  41. Addict

    Addict Well-Known Member

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    The Milket sounds amazing... but sod spending that money when I've already paid for a 'sports exhaust' zzzzz
     
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  42. Thundercliffe81

    Thundercliffe81 Well-Known Member Team V8 Team Sepang Audi RS4 Audi Avant Owner Group

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    I'm worried about that too.

    But less so with the C8 RS6. Emissions nonsense and new sound laws etc will kill it with the stock system. But the C7 was so well catered for in the aftermarket scene. I think we'll see the same amount of choice this time round. Would you change to a C7.5?

    Can you PM me your insta account please bud? I changed my account and can't find you anymore.


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  43. Thundercliffe81

    Thundercliffe81 Well-Known Member Team V8 Team Sepang Audi RS4 Audi Avant Owner Group

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    I think the Res delete on yours will add a lot of rawness to it. Maybe not much more volume as it's still single branch. But could be a nice cheap mod. Just a shame you have to cut it up.


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