S211 E55 Getting 2nd cats, resonator removed and x pipe fitted, how loud will it be.

Discussion in 'Engine' started by Kwan88, Aug 15, 2015.

  1. Kwan88

    Kwan88 Hardcore MB Enthusiast

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    Getting torqueflow to remove 2nd cats and resonator and fit an xpipe in a few weeks. But does anyone know how loud it will be inside the car at motorway 80mph speeds? I have a kid and was a bit concerned.

    Does the estate mean it will be louder than a saloon with this mod?

    Regards.
     
  2. WG M-B

    WG M-B Auhorised Forum Sponsor Authorised Forum Sponsor

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    Its the droning thats the issue. If you speak to the good exhaust guys they'll be able to advise you.
     
  3. AMGeed

    AMGeed MB Club Veteran

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    Kwan, relax, its not loud in a saloon and doubt it barely louder in an estate.
    It's outside the car you hear the noise, not inside.

    To give you an idea, at MSL I fortunately got to drive ChrisA's manic CLS55 with an IPE exhaust which as you know is extremely loud outside. I honestly hardly noticed the difference between his and mine from a drivers position, and mine is pretty quiet inside.
    Trust the guys at Torqueflow, they'll get it right.
     
  4. John

    John MB Club Veteran

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    Yes, agree with the above.

    I still have to open my windows to get the best sound from my exhaust.

    The car is very well insulated so with the windows shut - it's almost silent.

    I've said it before but I had a decat and the headers done and mine slightly drones at 75mph under load but drone is the wrong word because drone is a monotonous annoying sound whereas this is a meaty V8 burble which actually makes me press the loud pedal more to make it louder.

    This is not a tin pot 4 cylinder Escort you are dealing with!

    The best sound is when the car is fully loaded and you are accelerating.

    Imran will sort it how you want it...
     
  5. OP
    OP
    Kwan88

    Kwan88 Hardcore MB Enthusiast

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    Thanks guys.
     
  6. b1g1an

    b1g1an Hardcore MB Enthusiast

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    On a 211 you're starting at the wrong end, as is always said, the major restriction is the back boxes. Sort them which will give a decent increase in volume and then decide if you want to go for more extreme surgery, you may well not given what you've said.
     
  7. John

    John MB Club Veteran

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    Just a word of caution about back boxes.

    I deliberately hung on to my back boxes and kept them standard.

    I found any time anyone changes or modifies the back boxes - it is too much!

    It's obviously a subjective issue and everyone to their own but I suggest you do YouTube research to find the sound you want - that's what I did and it took me 3 years to decide (I wasn't in hurry to be honest).
     
  8. b1g1an

    b1g1an Hardcore MB Enthusiast

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    LOL so your saying the CLS is too loud as standard?
     
  9. whitenemesis

    whitenemesis MB Club Veteran

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    The CLS, from the factory, is significantly louder than the E class. I wouldn't change the system on my CLS but I might be tempted to if I drove an E55.
     
  10. John

    John MB Club Veteran

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    Er... nope.

    Not sure how you got to that but...

    ...and we are talking in the context of the E class on this thread.
     
  11. b1g1an

    b1g1an Hardcore MB Enthusiast

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    Easily, you change the back boxes to the CLS ones and it sounds much louder, like a CLS oddly enough. You claim any change is too much so therefore you must think the standard CLS is too loud...simple really :)
     
  12. John

    John MB Club Veteran

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    We aren't talking about the CLS - so I am not sure why you keep bringing it up.

    CLS as standard is louder than an E55 as standard - to start with.

    I am only talking about the E and what I've heard based on experience.

    I doubt a standard CLS is louder than mine with Kleemann headers/decat/X-pipe and no resonator so why would I think the CLS is too loud?

    :dk:
     
  13. b1g1an

    b1g1an Hardcore MB Enthusiast

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    Can't make this any simpler...change the E55 back boxes for CLS55 ones, it gets louder...you claimed any changes to the back boxes was too much and instead recommend drastic surgery to the rest of the system!

    To the OP, Alx has just listed his CLS 63 back boxes if you haven't noticed, the linked youtube vid shows it with the resonator removed too which oddly enough sounds just like a CLS with just the resonator removed!
     
  14. John

    John MB Club Veteran

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    ...and that goes back to my caution post, so I can't make it any simpler either - too much as in too loud and raucous. By modifications, I mean aftermarket or C63 or modifying the standard back boxes.

    I don't know every eventuality so I can't advise on every possibility - on what I sent - hence the word of caution... i.e. be aware.

    Mine with all the surgery but standard back boxes sounds perfect - right volume, but more importantly, right sound.
     
  15. OP
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    Kwan88

    Kwan88 Hardcore MB Enthusiast

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    Thanks guys, had the work completed yesterday. As you all said from the outside it sounds much better, the inside a little bit better. Was going to get it dyno but the dyno at MSL was out of action. They reckon it would have gained approx 14 bhp with 25 lb. I am going back soon to confirm the numbers but it seems better at top end, haven't really been driving since the mods.

    Imran's work and his team is excellent. He did put some washers under the support bar to avoid the x piping hitting the bar when hot. He said in most cases it will be fine and without the washers but I didn't want to get on the ramp again so just asked them to put the washers in.

    Overrall I am happy as all the other options were £500 just for c63 or cls back boxes and i would have fitting on top. Imran option was more cost effective.
     
  16. AMG-Singh

    AMG-Singh New Member

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    Can you confirm whether they were Copper, Steel or Rubber washers please?

    Does it sound better than an E55 with C63 rear boxes? because i've heard (no pun intended) that what you've done doesn't really make any difference to the DB Level of the Exhaust System

    Regards
     
  17. OP
    OP
    Kwan88

    Kwan88 Hardcore MB Enthusiast

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    REMOVED -
    And better than just spending double on c63 backbox with no performance gains, unless you removed the cats.
     
    Last edited by a moderator: Oct 3, 2015
  18. Jezzag

    Jezzag Member

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    Kwan88 - how do you find this conversion now? I am due to get a standard E55 Estate shortly and was looking at mods to give a moderate increase in V8 burble, but definitely do not want any motorway drone as that would annoy me. Have you taken any video of the conversion?
     
  19. TDE1

    TDE1 Hardcore MB Enthusiast

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    FWIW, I had C63 boxes fitted to my E55k saloon last month. Nothing else, yet. Little difference from inside the car with windows closed, but far nicer sound from outside or windows open. Under load its like a different car. More 'roary'. No drone on m/way... but rest of system is standard (so far...;))

    Couple of neighbours (car nuts, thankfully) asked what I'd had done - and that's only on start-up so it's not just my imagination.

    I've not posted about it before today, but a huge thanks to Alps for his help with the new boxes :thumb:

    Good luck with yours - you'll love it.
     
  20. Mrhanky

    Mrhanky Hardcore MB Enthusiast

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    Would be interested to hear the sound sometime mate.
     

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