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Turbo whine.

This is a discussion on Turbo whine. within the CLA Problems/Issues/Complaints forums, part of the Mercedes-Benz CLA Forum category; If there is a feature on the *inside* like a protruding flake of metal from the welding you will get turbulent flow and some "noise" ...

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  1. #21
    jmc
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    If there is a feature on the *inside* like a protruding flake of metal from the welding you will get turbulent flow and some "noise" as well.
    Think back to the days of thin cell antennas at the front or rear windows ... those were whistlers galore and so they went to the larger sharks fin jibberish to lower the resonance frequencies till *that* noise was buried in the car's (acceptable) baseline noise floor so we dont "hear" it ... cuz we cant distinguish it from the rest.

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    Quote Originally Posted by jmc View Post
    If there is a feature on the *inside* like a protruding flake of metal from the welding you will get turbulent flow and some "noise" as well.
    Think back to the days of thin cell antennas at the front or rear windows ... those were whistlers galore and so they went to the larger sharks fin jibberish to lower the resonance frequencies till *that* noise was buried in the car's (acceptable) baseline noise floor so we dont "hear" it ... cuz we cant distinguish it from the rest.
    This could be it.
    2015 Cla250 Non Sport

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  • #23
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    Quote Originally Posted by DavidCLA250 View Post
    It's weird because the first time I didn't hear anything, but it was after the second time I got the exhaust redone I'm assuming it caused this. This seems theoretical. But I'm extremely pissed now, because since I touched the exhaust does that mean that my warranty is completely voided for all engine problems. I thought they had to know that it was the cause before void.
    David, in some instances it is a matter of just trying to save money on their part. And they will fight, litigate, to prevent spending money. The last thing they want is a precedent establishing it would be ok to modify the engine. And they look upon almost anything as a modification. If you cross the line that is it. It seems to be black or white and not a lot of grey. And they are in charge. It is their ball game and they write the rules. And they can bring in MB certified mechanics and engineers that will testify that anything done to the engine creates changes in "the system." The system as it was designed. You upset the balance somewhere along the line.

    And as Eric alluded recently the reliance on MM may be a mistake.

    If they deny your claim in the future do you have the means to pay an attorney probably a minimum of 350.00 per hour. And both sides will drag it out and you will pay a fortune. And do you really think a judge is going to side against Mercedes Benz against you as a lone individual?

    I am not trying to be a pessimist but rather a realist. Do you have 20,000 for a new engine for a CLA 250? What is the current value of the car?

    We may not like it, it may not be fair, but it is what it is. Don't ever expect the courts to be fair and don't ever expect justice. It is a business.

    Now the usual haters of me will jump in here again w sarcasm re the post. But ask them how much they will contribute to your legal fees and the cost of an engine.

    Just to show you how simple it is to hurt you in the legal system all they have to do is ask the MB engineer or mechanic what the rated HP/TQ is for the standard engine. Then they ask the engineer or mechanic if a modified down pipe would increase the HP/TQ beyond the original design of the engine. That the engine was only designed for a stated power output and now that was increased beyond the original design of the engine, placing stress on all internal parts in excess of factory engineering and design. How do you argue against that?

    I truly wish you the best of luck.
    Last edited by 07SGT; 10-11-2016 at 08:03 PM.

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    Quote Originally Posted by 07SGT View Post
    David, in some instances it is a matter of just trying to save money on their part. And they will fight, litigate, to prevent spending money. The last thing they want is a precedent establishing it would be ok to modify the engine. And they look upon almost anything as a modification. If you cross the line that is it. It seems to be black or white and not a lot of grey. And they are in charge. It is their ball game and they write the rules. And they can bring in MB certified mechanics and engineers that will testify that anything done to the engine creates changes in "the system." The system as it was designed. You upset the balance somewhere along the line.

    And as Eric alluded recently the reliance on MM may be a mistake.

    If they deny your claim in the future do you have the means to pay an attorney probably a minimum of 350.00 per hour. And both sides will drag it out and you will pay a fortune. And do you really think a judge is going to side against Mercedes Benz against you as a lone individual?

    I am not trying to be a pessimist but rather a realist. Do you have 20,000 for a new engine for a CLA 250? What is the current value of the car?

    We may not like it, it may not be fair, but it is what it is. Don't ever expect the courts to be fair and don't ever expect justice. It is a business.

    Now the usual haters of me will jump in here again w sarcasm re the post. But ask them how much they will contribute to your legal fees and the cost of an engine.

    Just to show you how simple it is to hurt you in the legal system all they have to do is ask the MB engineer or mechanic what the rated HP/TQ is for the standard engine. Then they ask the engineer or mechanic if a modified down pipe would increase the HP/TQ beyond the original design of the engine. That the engine was only designed for a stated power output and now that was increased beyond the original design of the engine, placing stress on all internal parts in excess of factory engineering and design. How do you argue against that?

    I truly wish you the best of luck.
    Probably why we need to play nice at service departments and make a friend or two ... ideally with a master certified SA and a foreman

  • #25
    Veteran DavidCLA250's Avatar
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    Quote Originally Posted by 07SGT View Post
    David, in some instances it is a matter of just trying to save money on their part. And they will fight, litigate, to prevent spending money. The last thing they want is a precedent establishing it would be ok to modify the engine. And they look upon almost anything as a modification. If you cross the line that is it. It seems to be black or white and not a lot of grey. And they are in charge. It is their ball game and they write the rules. And they can bring in MB certified mechanics and engineers that will testify that anything done to the engine creates changes in "the system." The system as it was designed. You upset the balance somewhere along the line.

    And as Eric alluded recently the reliance on MM may be a mistake.

    If they deny your claim in the future do you have the means to pay an attorney probably a minimum of 350.00 per hour. And both sides will drag it out and you will pay a fortune. And do you really think a judge is going to side against Mercedes Benz against you as a lone individual?

    I am not trying to be a pessimist but rather a realist. Do you have 20,000 for a new engine for a CLA 250? What is the current value of the car?

    We may not like it, it may not be fair, but it is what it is. Don't ever expect the courts to be fair and don't ever expect justice. It is a business.

    Now the usual haters of me will jump in here again w sarcasm re the post. But ask them how much they will contribute to your legal fees and the cost of an engine.

    Just to show you how simple it is to hurt you in the legal system all they have to do is ask the MB engineer or mechanic what the rated HP/TQ is for the standard engine. Then they ask the engineer or mechanic if a modified down pipe would increase the HP/TQ beyond the original design of the engine. That the engine was only designed for a stated power output and now that was increased beyond the original design of the engine, placing stress on all internal parts in excess of factory engineering and design. How do you argue against that?

    I truly wish you the best of luck.
    This is understandable. Oh well. Nothing bad has happened yet so I guess everything is fine so far. But I don't believe a res/muffler delete would give any HP benefits? At least not to my knowledge. But yes, a lawyer Case would be a ridiculous idea to go through with. I'd spend more money in the long run.
    2015 Cla250 Non Sport

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    My turbo does make noise like " Cop Siren " during low rpm spooling.

  • #27
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    Quote Originally Posted by omarlekphet View Post
    My turbo does make noise like " Cop Siren " during low rpm spooling.
    Well ... you did take out that "noise damper" when you put in the new fmic 😋

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    Quote Originally Posted by DavidCLA250 View Post
    This is understandable. Oh well. Nothing bad has happened yet so I guess everything is fine so far. But I don't believe a res/muffler delete would give any HP benefits? At least not to my knowledge. But yes, a lawyer Case would be a ridiculous idea to go through with. I'd spend more money in the long run.
    David, I would think even a resonator/muffler delete could be attacked on two fronts. First, by deleting you create less back pressure. The engineer/mechanic testifies the system was designed to operate with x amount of back pressure. That it is a highly complex system and the synergy requires everything to remain as designed. Second, by deleting muffler you can reduce back pressure which can increase HP/Tq slightly. Maybe a few HP, but again, they can claim it upsets the system as designed. And that is why MB requires annual, or 10 K, maintenance, to ensure the system is running as designed/engineered. It would be great if MB would allow some mods and then warranty those mods. For example, you can have a supercharger added to a Mustang and the engine is under warranty as long as the supercharger and installation were done by an authorized Ford Dealer. But apparently MB does not do this, at least, to my knowledge, in North America.

    Again , I sincerely wish you the best. But expect no mercy, or friendship, etc when it comes from MB of North America. Like everything else in this world..........it is all about money. Good luck. You might want to ask the dealer if you remove the down pipe immediately would they still honor the warranty should it be needed. I think those of us with a technical background of engines realizes that a downpipe should not have any effect on something going wrong but that is not what they will say in court.

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    Quote Originally Posted by jmc View Post
    Well ... you did take out that "noise damper" when you put in the new fmic 
    Hahaha also internals

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    Quote Originally Posted by 07SGT View Post
    David, I would think even a resonator/muffler delete could be attacked on two fronts. First, by deleting you create less back pressure. The engineer/mechanic testifies the system was designed to operate with x amount of back pressure. That it is a highly complex system and the synergy requires everything to remain as designed. Second, by deleting muffler you can reduce back pressure which can increase HP/Tq slightly. Maybe a few HP, but again, they can claim it upsets the system as designed. And that is why MB requires annual, or 10 K, maintenance, to ensure the system is running as designed/engineered. It would be great if MB would allow some mods and then warranty those mods. For example, you can have a supercharger added to a Mustang and the engine is under warranty as long as the supercharger and installation were done by an authorized Ford Dealer. But apparently MB does not do this, at least, to my knowledge, in North America.

    Again , I sincerely wish you the best. But expect no mercy, or friendship, etc when it comes from MB of North America. Like everything else in this world..........it is all about money. Good luck. You might want to ask the dealer if you remove the down pipe immediately would they still honor the warranty should it be needed. I think those of us with a technical background of engines realizes that a downpipe should not have any effect on something going wrong but that is not what they will say in court.
    I haven't changed my downpipe yet though? It's still stock.
    2015 Cla250 Non Sport

    Mods: Vivid Racing Tune, Pedal Box, Blacked out roof/wheels/spoiler/grill/window trim, illuminated star, 6500k HID conversion Kit for Halogens, Window Tint, Resonator/Muffler delete
    Check out my build page! Here: http://www.mercedescla.org/forum/57-...ort-build.html

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