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The definitive PFL vs 2023 C63 side by side exhaust sound test coming...

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Old May 28, 2023 | 06:16 PM
  #26  
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Originally Posted by W205C43PFL
Hmmmm interesting, didn't know forum member RavenM6 had one of those, where did you read that he mentioned? I must have missed it.
Nevermind answering my own question: https://mbworld.org/forums/c63-c63s-...ml#post8763461

Last edited by W205C43PFL; May 28, 2023 at 06:25 PM.
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Old May 28, 2023 | 06:23 PM
  #27  
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Originally Posted by benzbell
I would venture to say that "yes" there is piped in sound. I noticed that it seems louder with the windows up versus the windows down which is the same in my 2022 GLE 63 as well. To me that says there is some piped in sound and that's why it sounds better with the windows up instead of down.
I wonder how much pipe in sound, is it the full deal or just the bass heavy part of the exhaust note. I guess it doesn't matter, car still sounds amazing I am most likely sure. I am also wondering if the reason why it sounds louder when windows are closed, has to do with our ears overwhelmed by tire noise, wind noise, etc.

Would be interesting having a friend recording a flyby of the two cars. Please make it happen OP : )
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Old May 29, 2023 | 05:02 AM
  #28  
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Originally Posted by superswiss
Well, didn't you say yours has the EVM? Can you clarify that? Obviously that changes things. Keeping the valves fully open when the stock setup keeps them partial closed at certain rpms changes the backpressure and exhaust pulse characteristics.
Yes, I do have the ASR evm. However, it accounts for the exhaust to be somewhat louder but isn’t supposed to add pops and bangs. If it did, then anyone with an FL who wanted more theatrics could just buy a $500 EVM instead of getting downpipes and a tune, which is the only proven solution to getting more pops and bangs on a FL. I also had the same evm on my ‘21 and it didn’t pop and bang as much or sound as loud as my ‘23.
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Old May 29, 2023 | 05:38 AM
  #29  
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Originally Posted by W205C43PFL
Nevermind answering my own question: https://mbworld.org/forums/c63-c63s-...ml#post8763461
Yeah I’ve mentioned the ASR a few times and also on the workaround to source one for way cheaper than its private label Renntech version. IMO, an evm is a must-have mod for these cars.

Originally Posted by W205C43PFL
I wonder how much pipe in sound, is it the full deal or just the bass heavy part of the exhaust note. I guess it doesn't matter, car still sounds amazing I am most likely sure. I am also wondering if the reason why it sounds louder when windows are closed, has to do with our ears overwhelmed by tire noise, wind noise, etc.

Would be interesting having a friend recording a flyby of the two cars. Please make it happen OP : )
Lots of points to ponder over when it comes to the sound of these final V8 C63S coupes. When I get my car back from ppf late next week, I’ll run some more tests. I’ll play around with different drive modes with and without the evm activated. I’ll also run some inside / outside tests both with the windows up and down using a decibel meter. I’ll follow up here with my findings.
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Old May 29, 2023 | 05:38 AM
  #30  
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This weekend I had the opportunity to check a couple of things:

-Drove a 23 non FE from the dealer, and to be honest sound its not even close to my FE

-At the same time yes FE sounds louder than non FE but different from the PFL, and definitely PFL still sounds louder.

All that checked with european versions

I am more inclined to what superswiss is saying



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Old May 29, 2023 | 06:01 AM
  #31  
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Originally Posted by japamg
This weekend I had the opportunity to check a couple of things:

-Drove a 23 non FE from the dealer, and to be honest sound its not even close to my FE

-At the same time yes FE sounds louder than non FE but different from the PFL, and definitely PFL still sounds louder.

All that checked with european versions

I am more inclined to what superswiss is saying
Good info. @superswiss was saying it was hard to imagine ‘23’s would be louder than previous FL’s given the increased noise regulations (which are only in Europe from my understanding). I assume he meant non-FE ‘23’s since we now have confirmation that ‘23 FE’s are indeed tuned to be louder than non-FE’s.

He also makes the point that my evm could be why my non-FE has pops and bangs vs no pops and bangs for OP’s. I’m really curious to test this theory because it would still mean the ‘23 non-FE’s are tuned different from other FL’s since the evm did nothing in terms of adding pops and bangs in my ‘21. I’ll also test the piped in sound theory, hopefully we can finally get to the bottom of all this soon!
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Old May 29, 2023 | 06:08 AM
  #32  
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Originally Posted by japamg
This weekend I had the opportunity to check a couple of things:

-Drove a 23 non FE from the dealer, and to be honest sound its not even close to my FE

-At the same time yes FE sounds louder than non FE but different from the PFL, and definitely PFL still sounds louder.

All that checked with european versions

I am more inclined to what superswiss is saying
Couple questions, have you installed an evm in your FE? And are you getting a lot of pops and bangs? If you could possibly post a sound video and/or decibel level test of your FE that would be awesome.
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Old May 29, 2023 | 11:30 AM
  #33  
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Originally Posted by RavenM6
Couple questions, have you installed an evm in your FE? And are you getting a lot of pops and bangs? If you could possibly post a sound video and/or decibel level test of your FE that would be awesome.
What's the biggest difference you notice in the EVM? Just louder at lower RPMs when it's on? Please elaborate - thank you.

Also, just came back from another 50 mile drive and I now have 432 miles on the clock. No pops or bangs - zero. I tried everything and I mean everything (combo wise) except stuffing a couple of potatoes in the exhaust. I might take you up on your trade offer now if yours sounds better - lol.
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Old May 29, 2023 | 12:50 PM
  #34  
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Originally Posted by benzbell
What's the biggest difference you notice in the EVM? Just louder at lower RPMs when it's on? Please elaborate - thank you.
The EVM just makes it louder at start up and low rpms yes... At full rpms there's hardly much difference to the sound that you'd be able to tell from just having the exhaust switch turned on. It won't change pop and crackles other than what your car was programed to do... That's not a function of the exhaust valves.
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Old May 29, 2023 | 01:05 PM
  #35  
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^^ Correct, @mars c63s summed it up nicely. You’ll hear the most noticeable difference at startup (especially cold starts), at low rpm’s, and at idle. But it does little if anything to increase the pops and bangs, at least not in my ‘21. I’ll soon know if it’s the same case with my ‘23 since I haven’t really driven it with the ASR module turned off.
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Old May 29, 2023 | 01:13 PM
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Originally Posted by mars c63s
The EVM just makes it louder at start up and low rpms yes... At full rpms there's hardly much difference to the sound that you'd be able to tell from just having the exhaust switch turned on. It won't change pop and crackles other than what your car was programed to do... That's not a function of the exhaust valves.
Thank you. That's pretty much what I figured. Nothing left to do right now except drive it I guess. Not the end of the world. It still sounds pretty decent.
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Old May 30, 2023 | 09:11 AM
  #37  
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Originally Posted by RavenM6
Yeah I’ve mentioned the ASR a few times and also on the workaround to source one for way cheaper than its private label Renntech version. IMO, an evm is a must-have mod for these cars.



Lots of points to ponder over when it comes to the sound of these final V8 C63S coupes. When I get my car back from ppf late next week, I’ll run some more tests. I’ll play around with different drive modes with and without the evm activated. I’ll also run some inside / outside tests both with the windows up and down using a decibel meter. I’ll follow up here with my findings.
Thank you, looking forward to hearing your findings.
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Old May 30, 2023 | 09:12 AM
  #38  
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Originally Posted by japamg
This weekend I had the opportunity to check a couple of things:

-Drove a 23 non FE from the dealer, and to be honest sound its not even close to my FE

-At the same time yes FE sounds louder than non FE but different from the PFL, and definitely PFL still sounds louder.

All that checked with european versions

I am more inclined to what superswiss is saying
Interesting, especially interesting is that the PFL still sounds louder, I wonder if regulations had a play again...
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Old May 30, 2023 | 09:14 AM
  #39  
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Originally Posted by RavenM6
Good info. @superswiss was saying it was hard to imagine ‘23’s would be louder than previous FL’s given the increased noise regulations (which are only in Europe from my understanding). I assume he meant non-FE ‘23’s since we now have confirmation that ‘23 FE’s are indeed tuned to be louder than non-FE’s.

He also makes the point that my evm could be why my non-FE has pops and bangs vs no pops and bangs for OP’s. I’m really curious to test this theory because it would still mean the ‘23 non-FE’s are tuned different from other FL’s since the evm did nothing in terms of adding pops and bangs in my ‘21. I’ll also test the piped in sound theory, hopefully we can finally get to the bottom of all this soon!
Yup super interested and cruious in the piped in sound part too.
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Old May 30, 2023 | 09:16 AM
  #40  
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Originally Posted by benzbell
Thank you. That's pretty much what I figured. Nothing left to do right now except drive it I guess. Not the end of the world. It still sounds pretty decent.
Simply curious OP I think I missed it and that you mentioned already but what made you upgrade from the pfl to facelift? Were you just interested in a new car or was there another reason?
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Old May 30, 2023 | 12:13 PM
  #41  
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Originally Posted by W205C43PFL
Simply curious OP I think I missed it and that you mentioned already but what made you upgrade from the pfl to facelift? Were you just interested in a new car or was there another reason?
Got rid of my PFL a couple of years ago and sold it to a buddy of mine who was in love with it. Remember, I had two PFLs a 2015 and 2018. I seem to have a penchant for selling a car and then buying the same model back again later. Did the same with the SL 63 as I had three of those over the years. Love the C63 and wanted the final iteration with all of the upgrades and improvements. Also never had a coupe before and wanted one.
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Old May 30, 2023 | 02:11 PM
  #42  
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Originally Posted by benzbell
Got rid of my PFL a couple of years ago and sold it to a buddy of mine who was in love with it. Remember, I had two PFLs a 2015 and 2018. I seem to have a penchant for selling a car and then buying the same model back again later. Did the same with the SL 63 as I had three of those over the years. Love the C63 and wanted the final iteration with all of the upgrades and improvements. Also never had a coupe before and wanted one.
I see. Your decision totally makes sense, especially that you want to try a coupe. I think the decision is right, let's just hope the exhaust opens up.
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Old May 30, 2023 | 09:52 PM
  #43  
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OP (and any others with 2023s): Can you use this PFL video as part of your comparisons and initial impressions of the sound?



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