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Exhaust question not pathfinder related


beavis0076
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If anyone can answer this question I would appreciate it! The MB forum hasn't come up with an answer in months... (they are too snobby to have worked on their cars to know)

I have an 06 C 230 Sport with a V6. On cold startup it sounds really loud and tough, after a min it quiets way down. It is quiet around town as well, but when u step on the gas and it gets past 4000 rpm it gets real loud agian. I am wondering if there is some sort of exhaust flap that is electronicly controlled? :shrug: If there is I want to disable it! ( I like the loud sound!) I have looked myself but see nothing. Could the varible valve timing give this effect?

On the bmw X3 I see what looks like a flap on one of the 2 exhaust outlets with what appears to be a servo hooked up to it. I have been meaning to check out one up close... but havn't as of yet. I am thinking i have something like this on mine.

 

Here she is... sorry, had to show her off. :tongue:

2832272070104806154S600x600Q85.jpg

Edited by beavis0076
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I dont know if this is your issue or not, but on my dads 06 G35 Sedan, the exhaust midpipe is different from the coupe midpipe. Its very obvious, if you ever hear a G35 Coupe exhaust vs Sedan Exhaust. So simple fix, just went to the junk yard, bought a used one, take off the stock midpipe, and install the coupe midpipe. When looking inside the pipe, it was alot less of a disturbed path, almost straight through, as apposed to the stock sedan midpipe that had more baffleing to it. I doubt that you can change this in your mercedes, but you could get a aftermarket exhaust or straight pipe it :D

 

Not my videos but here is the sound diff

Stock

 

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With Coupe Midpipe

 

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type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>" wmode="transparent" style="width:400px; height:326px;" id="VideoPlayback" type="application/x-shockwave-flash" flashvars="">
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No,

it sounds good on cold startup and then changes.

I found a vid of an X3 that def has an exhaust flap. You can see the flap close right after startup. I am thinking I have something like this in my exhaust.. but cant find it...

:clickdalink:

 

 

and here is a link off of youtube of what mine sounds like on cold startup, (someone else's car) you can hear its very free flowing.. then something changes and it quiets way down. althogh the recording here stops before that happens.

:clickdalink:

Edited by beavis0076
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ha my buddy has the same exact 230, down to the paint and rims.

 

maybe the mechanism for the internal exhaust gas recirculation (for emissions) ??

 

Put the mercedes on jackstand and take a look for yourself !!

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did you ask your questions at peachparts or benzworld? ver knowlegable folks at both of these places.

 

benzworld. got no reply.

I can see it being the choke with the cold startup.. but not at the high rev.

Oh well, I guess I will just have to look some more.

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benzworld. got no reply.

I can see it being the choke with the cold startup.. but not at the high rev.

Oh well, I guess I will just have to look some more.

 

 

Shot in the dark...

 

"C230 Sport had DOHC with continuously variable intake and exhaust timing. Magnesium 2-stage resonance intake manifold increased intake runner length at lower rpm for improved response.

 

Electropneumatic turbulence flaps at start of intake path help increase intake airflow speed at midrange rpm for greater air-fuel mixture swirling and stronger, more complete combustion"

 

:shrug: Dunno. I'm more a Nissan and BMW guy m'self.

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Shot in the dark...

 

"C230 Sport had DOHC with continuously variable intake and exhaust timing. Magnesium 2-stage resonance intake manifold increased intake runner length at lower rpm for improved response.

 

Electropneumatic turbulence flaps at start of intake path help increase intake airflow speed at midrange rpm for greater air-fuel mixture swirling and stronger, more complete combustion"

 

:shrug: Dunno. I'm more a Nissan and BMW guy m'self.

 

Hmmm .. you may be on to something there....

where did u get that info from?

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Hmmm .. you may be on to something there....

where did u get that info from?

 

MBUSA.com. Go to the CPO section and the "Model Overview" subsection. They have specs for every model going back several years.

 

Give 'em a call. They're helpful folk and, as the radio ads here constantly remind me, there is no waiting in line for the all-new, spectacular, extraordinary, remarkable, groundbreaking new Mercedes-Benz models. Basically, they've got time on their hands...

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MBUSA.com. Go to the CPO section and the "Model Overview" subsection. They have specs for every model going back several years.

 

Give 'em a call. They're helpful folk and, as the radio ads here constantly remind me, there is no waiting in line for the all-new, spectacular, extraordinary, remarkable, groundbreaking new Mercedes-Benz models. Basically, they've got time on their hands...

 

 

LMAO! thanks!

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benzworld. got no reply.

I can see it being the choke with the cold startup.. but not at the high rev.

Oh well, I guess I will just have to look some more.

 

 

maybe that section is slow there or something.. definitely go to peachparts (old mercedesshop).. but then again, that may be a slow section there too..

 

 

after gpg's such a nice comment, i'm going to have to lay off the beemer dudes for a while... damn. :D :D

that sounds about right too.. interesting.. i don't know if you could really disable it without adverse effects.. benzes can be finicky as hell.

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maybe that section is slow there or something.. definitely go to peachparts (old mercedesshop).. but then again, that may be a slow section there too..

after gpg's such a nice comment, i'm going to have to lay off the beemer dudes for a while... damn. :D :D

that sounds about right too.. interesting.. i don't know if you could really disable it without adverse effects.. benzes can be finicky as hell.

 

Yea, its still a pretty new car, and not one that gets modded much. Lots o stuff on older benzes... but not mine.

And I think your right... everything is linked together via electronics.... if I touch it alarm bells will prob go off.............*grumble*

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maybe that section is slow there or something.. definitely go to peachparts (old mercedesshop).. but then again, that may be a slow section there too..

after gpg's such a nice comment, i'm going to have to lay off the beemer dudes for a while... damn. :D :D

that sounds about right too.. interesting.. i don't know if you could really disable it without adverse effects.. benzes can be finicky as hell.

 

 

Thank you. :)

 

Unfortunately, I think I'm the exception when it comes to BMW owners. Most are arrogant schmucks whose self-esteem is totally tied up in their cars. I don't even bother following the BMW boards since pretty much every thread turns into "Mine is faster/smarter/bigger/more expensive NYA NYA NYA!" I visit 'em only via links from other sites to specific pieces of info. I know that's a sweeping generalization, but I just don't have the time to find the normal ones out there. :laugh:

 

So flame away at the BMW owners, basically. :lol:

 

"Electropneumatic" is a German auto manufacturer classification. Translated into english it means "Ridiculously over-complicated, highly fragile and probably completely unnecessary equipment destined to fail at great cost to the owner and designed solely to prove German engineering is superior and too sophisticated for your feeble mind. Handle at your own risk and watch us laugh as we void your warranty and empty your childrens and grandchildrens college funds to pay for the repairs, stupid Anglo-Saxon."

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Thank you. :)

 

Unfortunately, I think I'm the exception when it comes to BMW owners. Most are arrogant schmucks whose self-esteem is totally tied up in their cars. I don't even bother following the BMW boards since pretty much every thread turns into "Mine is faster/smarter/bigger/more expensive NYA NYA NYA!" I visit 'em only via links from other sites to specific pieces of info. I know that's a sweeping generalization, but I just don't have the time to find the normal ones out there. :laugh:

 

So flame away at the BMW owners, basically. :lol:

 

"Electropneumatic" is a German auto manufacturer classification. Translated into english it means "Ridiculously over-complicated, highly fragile and probably completely unnecessary equipment destined to fail at great cost to the owner and designed solely to prove German engineering is superior and too sophisticated for your feeble mind. Handle at your own risk and watch us laugh as we void your warranty and empty your childrens and grandchildrens college funds to pay for the repairs, stupid Anglo-Saxon."

 

Yea,,,, but it sure makes the exhaust note sound great!!!! :laugh:

Oh, and GPG.. my car is faster than yours....... :takebow:

Edited by beavis0076
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Yea,,,, but it sure makes the exhaust note sound great!!!! :laugh:

 

Oh yeah. Nothing against your car. I was just taking an easy potshot at the German obsession with overengineering and the ridiculous cost of repairs.

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Oh yeah. Nothing against your car. I was just taking an easy potshot at the German obsession with overengineering and the ridiculous cost of repairs.

 

 

I totally agree! :-)

I think you missed a part up above......

Edited by beavis0076
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Thank you. :)

 

Unfortunately, I think I'm the exception when it comes to BMW owners. Most are arrogant schmucks whose self-esteem is totally tied up in their cars. I don't even bother following the BMW boards since pretty much every thread turns into "Mine is faster/smarter/bigger/more expensive NYA NYA NYA!" I visit 'em only via links from other sites to specific pieces of info. I know that's a sweeping generalization, but I just don't have the time to find the normal ones out there. :laugh:

 

So flame away at the BMW owners, basically. :lol:

 

"Electropneumatic" is a German auto manufacturer classification. Translated into english it means "Ridiculously over-complicated, highly fragile and probably completely unnecessary equipment destined to fail at great cost to the owner and designed solely to prove German engineering is superior and too sophisticated for your feeble mind. Handle at your own risk and watch us laugh as we void your warranty and empty your childrens and grandchildrens college funds to pay for the repairs, stupid Anglo-Saxon."

 

 

hahahahahahahahahahahaha.. that's some funny stuff there.. hahahahahahaha.... thanks.. and oh so freaking true. P... but man, they put out some beauties. :D

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  • 7 months later...

ok, so this thread is back from the dead.... GPG's explanation with overly engineered stuff may be dead on.. that sweet exhaust sound stopped happening, and im low on power in the top end.... back to the dealer@!*% again... ugh.. 1 month to go on my warranty... :thumbsdown:

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