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      05-04-2018, 12:13 AM   #1
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Hi All. So I recently installed he M performance exhaust with my ER catless DP and am getting much more drone than expected. Looking to see if anyone has any tips or tricks possibly to mitigate this some at least.

I've heard a wider front pipe may help but can't find anyone other than Akra or meisterschaft (can't remember which) making one but it's like 950 bucks.

My specific issue is drone around 2700-3200 RPM and then like a high pitch drone noise that builds and peaks at 4.5K and then again at like 6k.

Anyways... any feedback or advice is appreciated! For what it's worth I'm loving the sound of the exhaust otherwise and love the look and quality of it.
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      05-04-2018, 09:51 AM   #2
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some people claim that disabling the ASD helps as some of the drone is fake cabin noise
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      05-04-2018, 09:53 AM   #3
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Quote:
Originally Posted by gtaM2 View Post
some people claim that disabling the ASD helps as some of the drone is fake cabin noise
Did that before installing :-/
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      05-04-2018, 10:03 AM   #4
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some people have welded in the stock resonator check out below:
http://f87.bimmerpost.com/forums/sho...ight=resonator

i was considering doing this but i have gotten use to it so it doesnt bother me anymore
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      05-04-2018, 10:34 AM   #5
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I've deleted asd and added stock resonator. There is still drone but I haven't heard an m2 with MPE and no resonator to know how different it is
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      05-04-2018, 10:36 AM   #6
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Quote:
Originally Posted by monochrom3 View Post
I've deleted asd and added stock resonator. There is still drone but I haven't heard an m2 with MPE and no resonator to know how different it is
I have video but it's just not captured
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      05-04-2018, 10:37 AM   #7
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Quote:
Originally Posted by gtaM2 View Post
some people have welded in the stock resonator check out below:
http://f87.bimmerpost.com/forums/sho...ight=resonator

i was considering doing this but i have gotten use to it so it doesnt bother me anymore
Like doesn't work. Can you post the url? Curious about this
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      05-04-2018, 10:38 AM   #8
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Quote:
Originally Posted by monochrom3 View Post
I've deleted asd and added stock resonator. There is still drone but I haven't heard an m2 with MPE and no resonator to know how different it is
How bad is the drone?
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      05-04-2018, 10:40 AM   #9
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Quote:
Originally Posted by abirmaher View Post
Quote:
Originally Posted by monochrom3 View Post
I've deleted asd and added stock resonator. There is still drone but I haven't heard an m2 with MPE and no resonator to know how different it is
How bad is the drone?
It's not unbearable to me. Can still have a conversation. It's not as bad as an e46M with aftermarket exhaust
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      05-04-2018, 10:41 AM   #10
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Quote:
Originally Posted by monochrom3 View Post
Quote:
Originally Posted by abirmaher View Post
Quote:
Originally Posted by monochrom3 View Post
I've deleted asd and added stock resonator. There is still drone but I haven't heard an m2 with MPE and no resonator to know how different it is
How bad is the drone?
It's not unbearable to me. Can still have a conversation. It's not as bad as an e46M with aftermarket exhaust
Gotcha. Is your like mine in the rev range or is it just at a single rpm range?
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      05-04-2018, 10:47 AM   #11
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Though it doesn't sound nearly as bad on video...
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      05-04-2018, 12:25 PM   #12
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Quote:
Originally Posted by abirmaher View Post
Though it doesn't sound nearly as bad on video...
Doesn't sound bad at all to me.
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      05-04-2018, 01:14 PM   #13
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Quote:
Originally Posted by voyagergab View Post
Quote:
Originally Posted by abirmaher View Post
Though it doesn't sound nearly as bad on video...
Doesn't sound bad at all to me.
Yeah unfortunately the video really doesn't do it justice
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      05-04-2018, 01:14 PM   #14
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Quote:
Originally Posted by abirmaher View Post
Quote:
Originally Posted by monochrom3 View Post
Quote:
Originally Posted by abirmaher View Post
Quote:
Originally Posted by monochrom3 View Post
I've deleted asd and added stock resonator. There is still drone but I haven't heard an m2 with MPE and no resonator to know how different it is
How bad is the drone?
It's not unbearable to me. Can still have a conversation. It's not as bad as an e46M with aftermarket exhaust
Gotcha. Is your like mine in the rev range or is it just at a single rpm range?
Drone is in a small range of around 2600-3000.
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      05-04-2018, 01:19 PM   #15
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Quote:
Originally Posted by abirmaher View Post
Like doesn't work. Can you post the url? Curious about this
try
http://f87.bimmerpost.com/forums/sho....php?t=1463037
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      05-04-2018, 01:25 PM   #16
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Quote:
Originally Posted by voyagergab View Post
Quote:
Originally Posted by abirmaher View Post
Though it doesn't sound nearly as bad on video...
Doesn't sound bad at all to me.
I saw on the other thread that you put the stock resonator back in there. Thoughts on that? Are you running with a catless downpipe? This is one that crossed my mind to try
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      05-04-2018, 01:29 PM   #17
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Quote:
Originally Posted by abirmaher View Post
Quote:
Originally Posted by voyagergab View Post
Quote:
Originally Posted by abirmaher View Post
Though it doesn't sound nearly as bad on video...
Doesn't sound bad at all to me.
I saw on the other thread that you put the stock resonator back in there. Thoughts on that? Are you running with a catless downpipe? This is one that crossed my mind to try
Yeah I did the stock resonator.
Running the stock down pipe and MPE the car sounds very civilized especially after adding some sound deadening back into the car.

Sometimes I even think it's too quiet lol. But if you step on it the MPE still sings.
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      05-04-2018, 07:43 PM   #18
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Quote:
Originally Posted by voyagergab View Post
Quote:
Originally Posted by abirmaher View Post
Quote:
Originally Posted by voyagergab View Post
Quote:
Originally Posted by abirmaher View Post
Though it doesn't sound nearly as bad on video...
Doesn't sound bad at all to me.
I saw on the other thread that you put the stock resonator back in there. Thoughts on that? Are you running with a catless downpipe? This is one that crossed my mind to try
Yeah I did the stock resonator.
Running the stock down pipe and MPE the car sounds very civilized especially after adding some sound deadening back into the car.

Sometimes I even think it's too quiet lol. But if you step on it the MPE still sings.
What did you do for sound deadening? It's definitely very loud with the catless very happy with sound from the outside but in the car the drone is just a bit much. Thinking about doing something like what you did even if it restricts the flow slightly.
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