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      07-10-2014, 03:20 PM   #89
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will probably go with exhaustmeister or wiring the valves
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      07-10-2014, 03:57 PM   #90
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Quote:
Originally Posted by soooma View Post
Yeah
For starters I just found out that my M5 Non CP has better exhauste than almost most cars out there for eg stock CTS-V, Audi S6, (Not RS7 as I heard it), but better than Panamera Turbo that I just test drove today and the SA laughed at my exhauste and said "Now your car sounds more like a 911" and did admire my Non CP M5 stock exhauste... So short of exotics and this sort of cars but rest assured M5 especially CP sounds great as stock as it is but again M4 sounds way better than M5 NON CP probably CP like? Not sure anybody compared?
Sooma are you sure about this??? I'm soo tempted to do this.. I need to make sure though. Is there anyone that has done with dyno can chime in? or even the butt dyno.
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      07-10-2014, 04:26 PM   #91
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Quote:
Originally Posted by shahano View Post
Sooma are you sure about this??? I'm soo tempted to do this.. I need to make sure though. Is there anyone that has done with dyno can chime in? or even the butt dyno.
O am not sure but the car guy who told seemed to be speaking science to me and I couldn't but believe him since I wasn't informed enough to disagree and weird thing I had an appointment 30 minutes later that I canceled for that reason.

Less back pressure and turbos will take more time to spool as trivial as it can be but kess efficiency and I looked it up and there was a nice video about it that is about a couple of minutes and did aaybthe same!! No just muffling sounds it seems!

I wiah he or they were wrong but they seem to know more than me at least!
And I hate to hurt the car to sound better not fair -
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      07-10-2014, 04:49 PM   #92
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Quote:
Originally Posted by soooma View Post
It seems so from my research nothing crazy but enough to make not want to do it -
I almost pulled the trigger on it today but also met with a car enthusiast who helped build cars in the past and confirmed that you wouldn't wanna do this to your M5 because it does affect back pressure and you will be using your gas pedal more to achieve same power!! NOT FOR ME -


IF YOU HAVE A MORE SCIENTIFIC PROOF This doesn't hold true for M5 please present your piece now or hold it forever !
I have done it on my E63 wagon TT, CLS63TT, SL63TT, RS7 (Turbo) and numerous NA cars. I gained sound and had no issues with the pedal LOL and I'll stand by my experience. The resonator is sound deadening device and will not affect performance. I would think professionals at multiple tuners can't be wrong on the Benz sites (Weistec, OE, Benzworks, etc). Look either you do it or don't but you seem to wallow a lot and for that reason I say you DONT.

So I guess its case closed for you soooma LOL. N.S.A. is the real deal, lives local and has done it and I would have too but I sold the M5 rather quickly.
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      07-13-2014, 11:15 PM   #93
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Quote:
Originally Posted by Vic55 View Post
I have done it on my E63 wagon TT, CLS63TT, SL63TT, RS7 (Turbo) and numerous NA cars. I gained sound and had no issues with the pedal LOL and I'll stand by my experience. The resonator is sound deadening device and will not affect performance. I would think professionals at multiple tuners can't be wrong on the Benz sites (Weistec, OE, Benzworks, etc). Look either you do it or don't but you seem to wallow a lot and for that reason I say you DONT.

So I guess its case closed for you soooma LOL. N.S.A. is the real deal, lives local and has done it and I would have too but I sold the M5 rather quickly.
Absolutely -
Can't hurt my baby Vic55 - as the more I read about resonators delete the more I'm convinced that it is not just for muffling sounds and PLEASE PROVE ME WRONG OBJECTIVELY NOT FEELING OR PREVIOUS EXPERIENCES AS WE ARE PROBABLY TALKING 5% OR SO POWER LOSS AND I WILL DO THE DELETE 100% I PROMISE AND WILL POST VIDEOS TOO.
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      07-14-2014, 07:55 PM   #94
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Quote:
Originally Posted by soooma View Post
Absolutely -
Can't hurt my baby Vic55 - as the more I read about resonators delete the more I'm convinced that it is not just for muffling sounds and PLEASE PROVE ME WRONG OBJECTIVELY NOT FEELING OR PREVIOUS EXPERIENCES AS WE ARE PROBABLY TALKING 5% OR SO POWER LOSS AND I WILL DO THE DELETE 100% I PROMISE AND WILL POST VIDEOS TOO.
Call any tuner: EAS, BMS, AMS, RennTech, Switzer, etc and ask them. They know turbo cars and understand what resonators do in regards to the engine power.

I don't need to prove you wrong- my time is too valuable but since I started this thread I have to see those damn reminders that you are posting here LOL.
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      07-14-2014, 09:13 PM   #95
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Quote:
Originally Posted by Vic55 View Post
Call any tuner: EAS, BMS, AMS, RennTech, Switzer, etc and ask them. They know turbo cars and understand what resonators do in regards to the engine power.

I don't need to prove you wrong- my time is too valuable but since I started this thread I have to see those damn reminders that you are posting here LOL.



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      07-14-2014, 11:21 PM   #96
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Quote:
Originally Posted by soooma
Quote:
Originally Posted by Vic55 View Post
Call any tuner: EAS, BMS, AMS, RennTech, Switzer, etc and ask them. They know turbo cars and understand what resonators do in regards to the engine power.

I don't need to prove you wrong- my time is too valuable but since I started this thread I have to see those damn reminders that you are posting here LOL.



Sooma your silly... Get them removed you won't regret it.
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      10-28-2014, 07:11 AM   #97
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After lots of thinking. I took my M5 CP lci for removing resonators. There is NO drone. And car is louder at 2500 3500 rpm. There is no much difference. Only more a little bit. I will make a video soon. 50€labor
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      10-28-2014, 07:59 AM   #98
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Quote:
Originally Posted by rafaele92
After lots of thinking. I took my M5 CP lci for removing resonators. There is NO drone. And car is louder at 2500 3500 rpm. There is no much difference. Only more a little bit. I will make a video soon. 50labor
I also did this. I can confirm that cp s are res delete from factory. I have my stock " res" cut open in my garage and there is no res. it's a straight pipe that's made to look like the stock w/ res.

So all CPs are res delete from factory.
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      10-28-2014, 09:06 AM   #99
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Now im quite sad....

i thank i will need some Downpipes for better sound....

the stupid part , it´s from outside it looks like something , stupid BMW
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      10-28-2014, 09:42 PM   #100
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Quote:
Originally Posted by rafaele92
Now im quite sad....

i thank i will need some Downpipes for better sound....

the stupid part , its from outside it looks like something , stupid BMW
Agreed absolutely stupid. Cost me $150 to find this out a few weeks back on my CP exhaust.

Now for the benefit of others, pic attached of "resonator" on CP exhaust. It's basically straight through...
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      10-29-2014, 06:20 AM   #101
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So to summarize:

Non-CP cars: resonator delete gives slight increase in sound.
CP cars: resonator is essentially a straight pipe, leave it be/save your money.

Is that about it for a 5 page thread?
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      10-29-2014, 11:25 AM   #102
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absolutely
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      12-29-2015, 07:43 PM   #103
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Quote:
Originally Posted by stealth.pilot View Post
Not sure they have.

However I have Eisenmann mid pipes with Eisenmann Sport mufflers which is a proxy since the Eisenmann Sport uses OEM valve control to reduce low rpm noise (just like the OEM exhaust) but the mid pipes have no resonator and result in more throatiness.

The initial throttle response is more real whereas without the mid pipe it just sounds muted on initial response. On the whole it is a much more comprehensive sound than just adding the axleback. Makes the car sound racy but without drone.

It also seems you hear more of the turbo noise with the resonator deleted.
Where did you get this setup? Also, are you able to keep the butterfly valve open if you wish or is it vacuum operated as well?
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      12-29-2015, 11:10 PM   #104
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Just get straight pipes, remove resonators and mufflers - turbo cars don't need back pressure like NA cars. Max power. RPi GTM is the way forward. Sounds amazing. Turn off active sound..!!
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      12-30-2015, 09:08 AM   #105
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I was thinkin' (dangerous I know), maybe the resonator delete is the way to go for someone like me. More sound, low cost, probably get a local exhaust shop to do it and I'm passing emissions as well. Any ATL Georgia guys gone this route?
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      04-13-2017, 10:56 PM   #106
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reviving an old thread...

Does anyone have a pic of their non CP resonators? Thinking of doing this but not sure if would make much of a difference in sound.

Are CP resonators the same as standard M5 exhaust?
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      04-15-2017, 03:50 AM   #107
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We removed the resonators, and at same time re-made the X-pipe by hand, this also removes the extra restrictive pinch in the stock X-pipe

definitely felt extra power from this, and totally removes the horrible rasping farting noise.

Was a fantastic mod for us, but still drones

-
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      04-19-2017, 06:27 PM   #108
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Here's a very light acceleration (M6), essentially sounds the same:

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      04-20-2017, 06:37 AM   #109
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Quote:
Originally Posted by VoytekM5 View Post
reviving an old thread...

Does anyone have a pic of their non CP resonators? Thinking of doing this but not sure if would make much of a difference in sound.

Are CP resonators the same as standard M5 exhaust?
CP resonators are not the same as standard. See pic above of the CP one. Standard resonators have perforations inside. I removed my resonators (non CP) and disabled active sound. The car is quiet on the inside. I then forced the exhaust valves open. All that did was create drone when the windows where down under 3K rpms. But, cold starts were louder and there was a minor volume increase with the valves open.
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      04-04-2018, 03:53 AM   #110
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Quote:
Originally Posted by stealth.pilot View Post
Not sure they have.

However I have Eisenmann mid pipes with Eisenmann Sport mufflers which is a proxy since the Eisenmann Sport uses OEM valve control to reduce low rpm noise (just like the OEM exhaust) but the mid pipes have no resonator and result in more throatiness.

The initial throttle response is more real whereas without the mid pipe it just sounds muted on initial response. On the whole it is a much more comprehensive sound than just adding the axleback. Makes the car sound racy but without drone.

It also seems you hear more of the turbo noise with the resonator deleted.
Hi, sorry for a late question in this thread.... but would a resonator delete on the OEM exhaust give the same sound as using an Eisenmann mid section non resonated with E-Sport in both set up..?

Morten
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