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  1. 01-23-2016 08:39 AM #1
    robster52
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    Resonance at 1000rpm

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    Just noticed a resonance (exhaust maybe) as the engine goes through 1000rpm.

    Is this normal? never noticed it before though
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  2. 01-23-2016 08:52 AM #2
    MrFunk
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    Aftermarket exhaust?
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  3. 01-23-2016 08:59 AM #3
    robster52
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    nope, stock. passenger side was replaced 8 months ago though after a motorbike hit me and knocked it off
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  4. 01-23-2016 09:26 AM #4
    Brother Owl
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    My stock exhaust can be a little bit "boomy" at ~1000rpm when backing out of parking or reving to get car moving. 6MT
    B8.5 █S4 Estoril Blue Crystal 6MT : IE DP 3.2PR
    Denver to Vegas in 9:26
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  5. 01-23-2016 10:24 AM #5
    Steve_Ep
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    Mine is the same. Neutral rev to 1500rmp and let the needle drop it gets rough right at 1000rpm

    Think it's normal
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  6. 01-23-2016 10:54 AM #6
    shoe3k
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    I have encountered the same resonance and seems normal.
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    Previous: |'18 Golf R | '17 S6 | '15 S4 | '15 STI | '12 GLI Autobahn | '08 Passat | '04 R32 | '05 GTI 1.8t |
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  7. 01-23-2016 11:26 AM #7
    jygesq
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    Most engines have a resonance point
    2015 S4, P+, Florett Silver,black /silver nappa leather, S-tronic ,sport diff,B&O ,tech package ,supercharged badges. All season tires ,cargo net, factory dip stick
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  8. 01-23-2016 01:48 PM #8
    MrFunk
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    The downpipes have been known to have some resonance. It's more noticeable with aftermarket exhaust in cold weather (IMO). I don't even notice it any longer but the first winter after putting my AWE on I noticed it at around 1200 rpm.
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  9. 01-24-2016 02:48 AM #9
    robster52
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    Cheers guys, weather has been a bit up and down here (UK) so close tolerances and that are likely to be the reason. Will ask my local tech to ramp it and give it a prod if it doesn't clear by itself
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  10. 03-05-2016 05:05 AM #10
    zoop
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    just had my downpipes replaced due to vibration around 1100rpm. tech said he could see the downpipes vibrate when under the car... fixed the issue
    2013 Estoril Blue DSG SportDiff AK VMR713
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  12. 04-29-2016 08:13 AM #11
    robster52
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    My tech thinks the cats are loose. Seems odd but I do trust him.
    We know how much they cost....
    Does it seem the likely problem?
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  13. 04-29-2016 10:16 AM #12
    vtbert3
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    I think I had the same issue. If I went through or held the RPMs around 1200, then there would be a bad vibration (much more so when cold out). Ended up having to replace both downpipes. It took a while to get the dealer to fix under warranty, but after they were replaced there was no more vibration. Not sure exactly how they failed, as there was no exhaust leak, but they were ultimately the issue for me.
    Last edited by vtbert3; 04-29-2016 at 10:35 AM.
    2014 S4 - Moonlight Blue
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  14. 04-29-2016 02:46 PM #13
    -leman-
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    Had the vibration issue @1000 rpm from day one of owning the car, fixed by replacing the flex pipes on both downpipes.
    2011 S5 Sportback
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  15. 04-29-2016 03:13 PM #14
    robster52
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    Have attached a video guys to see if the noise was the same.
    Downpipes sound a bit better than 2 new cats

    https://youtu.be/ig4E9TTQVlk
    Last edited by robster52; 04-29-2016 at 03:25 PM.
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  16. 05-01-2016 01:16 PM #15
    robster52
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    gave it a few more beans and there's a bit of a clonk around 3000rpm then the tweety bird sound at 1100rpm

    didn't know the car wouldn't let you rev over 4000 in P or N until I tried it

    https://www.youtube.com/watch?v=TjJCwPiqqxE
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