10-11-2016, 08:22 AM | #1 |
Lieutenant
273
Rep 486
Posts |
MPE Drone Specific RPM
Hey --
I'm wondering if anyone else has experienced a drone in their MPE at a specific RPM. In my case, it happens at 2750-3250. Outside of that range, everything is great but in that range there's a drone and resonance under acceleration. Flaps can be open or closed and there's the same drone/resonance. The video below doesn't do it justice as to the volume of the drone/resonance. Once I get the car back from paint protection I will take it to the dealer and drive around with a tech and see if anything is loose. But before I do that, I'm wondering if anyone has experienced something similar. https://drive.google.com/file/d/0B7R...ew?usp=sharing |
10-11-2016, 10:26 AM | #2 | |
Lieutenant
169
Rep 428
Posts
Drives: G29 Z4 M40i; G05 X5 M50i
Join Date: Apr 2010
Location: Rhineland Palatinate - Germany
|
Quote:
|
|
Appreciate
0
|
11-21-2016, 04:22 PM | #4 |
Lieutenant
273
Rep 486
Posts |
1150 Miles and still there. Slightly better. Figure I'll give it another 1000 miles before I make a decision. I'm also getting used to it so it's not as bad in my head any more.
That having been said, I will be coding out ASD on 02DEC and will report back to see if that helped in any way. |
Appreciate
0
|
11-21-2016, 11:09 PM | #5 |
Second Lieutenant
260
Rep 290
Posts |
I have MPE and I did the ASD bypass (using the harness) and it drones MUCH less. It's almost quiet now, which is fine. It's quiet with valves closed, and loud when I open them up. Best of both worlds. (plus the sound is real--the dash cam footage of my cruise ended up sounding like a video game thanks to the ASD)
|
Appreciate
1
blackholescion272.50 |
11-21-2016, 11:56 PM | #6 |
Lieutenant
169
Rep 428
Posts
Drives: G29 Z4 M40i; G05 X5 M50i
Join Date: Apr 2010
Location: Rhineland Palatinate - Germany
|
I also have ASD turned off by the BMT ODB Can Flap Module and it works quite well. Natural sound in combination with the MPE is very nice. I also figured out that the vibration during startup program are mostly coming from the tips. I you really screw them very hard, the vibration from the back is nearly gone...
|
Appreciate
2
blackholescion272.50 PhilL61.50 |
11-22-2016, 11:49 PM | #7 | |
Colonel
3179
Rep 2,577
Posts |
Quote:
From what I heard, it's a known issue that no one ever found a proven solution yet.
__________________
Lemania 2320
|
|
Appreciate
1
PhilL61.50 |
12-06-2016, 09:32 AM | #8 |
Lieutenant
273
Rep 486
Posts |
After getting my ASD coded out, I think it's good on the highway flaps open or closed. Very little to any drone at cruising. However, there is still a lot of drone present in the RPM range, especially during normal city/traffic/Sunday driving. The car actually gets quieter once it passes the drone range and you can hear the motor and exhaust better.
I'm going to be checking out the Akra setup from DetailersDomain in January and if there's no drone, will be swapping. I can't live long term with the drone. It's annoying and not what I bought the MPE for. It takes the enjoyment out of hearing the ehxaust. Other than the drone though, Everything else sounds amazing. As long as you're not in the RPM range, it's an amazing sounding exhaust. |
Appreciate
0
|
12-06-2016, 10:38 AM | #9 | |
Colonel
3179
Rep 2,577
Posts |
Quote:
__________________
Lemania 2320
|
|
Appreciate
0
|
12-06-2016, 10:39 AM | #10 |
Lieutenant
273
Rep 486
Posts |
|
Appreciate
0
|
12-07-2016, 12:32 PM | #11 |
Colonel
4407
Rep 2,856
Posts
Drives: BMW M2 CSL Turbomeister
Join Date: Sep 2013
Location: Travelling / Managing / Writing
|
Guys, I have an Akrapovic and no drone. I absolutely have no sound issues.
I experienced that drone driving a manual M2 with MPE and ASD on, and I was like this noise is annoying... Even on idle I was like can someone please remove the ASD please... I choose to remove ASD, after I drove a M4 with an Akrapovic and the ASD was just complete annoying. I am happy it is gone now and I can enjoy the exhaust properly. If there is anything 'annoying' on my set up, it might be other people's feelings when I blast pass them... :P MR |
Appreciate
1
blackholescion272.50 |
12-07-2016, 12:40 PM | #12 | |
Lieutenant
273
Rep 486
Posts |
Quote:
I'm checking out an Akrapovic exhaust next month thanks to DetailersDomain . I might be making the switch after I hear it for myself and confirming. Your experience is confirming everything I've read about the two exhausts so assuming all goes well, I'll be switching. As for the other people's feelings, how can you notice them when you've left them in the dust? |
|
Appreciate
0
|
12-11-2016, 03:24 PM | #13 | |
Captain
62
Rep 629
Posts |
Quote:
|
|
Appreciate
0
|
12-12-2016, 05:31 PM | #14 |
Captain
62
Rep 629
Posts |
So it turns out the system is designed and manufactured near to me in the U.K. and it might be worth contacting them directly with consumer feedback in relation to any drone issues, especially as they claim "the clear target from BMW was to deliver acoustic performance fitting to the extreme sporty nature of the vehicle, without unpleasant resonant frequencies"
http://redarcheng.co.uk/news/bmw-m2-...duction-ramps/ |
Appreciate
1
blackholescion272.50 |
12-12-2016, 06:52 PM | #15 |
Captain
625
Rep 796
Posts |
I'm catless. My drone is worse in comfort vs sport with the exhaust flap full open on both. In part I believe to the wastegate position and the active sound. I believe active sound actually helps dissolve drone around 3k. One reason to keep it.
|
Appreciate
0
|
12-13-2016, 08:11 AM | #16 | |
Lieutenant
273
Rep 486
Posts |
Quote:
|
|
Appreciate
0
|
12-13-2016, 11:38 AM | #18 |
Captain
183
Rep 791
Posts |
Having second thoughts getting one now....
__________________
YMB F80 M3 DCT (Gone but never forgotten)
AW F87 M2 6MT (Current whip) |
Appreciate
0
|
12-13-2016, 12:10 PM | #19 | |
Captain
62
Rep 629
Posts |
Quote:
Can't say anything about drone as only driven it about 10 miles on the motorway to the detailers since fitting and wasn't an issue for me in that short drive, far too early to comment on this really. |
|
Appreciate
0
|
12-14-2016, 01:26 AM | #22 | ||
Captain
183
Rep 791
Posts |
Quote:
__________________
YMB F80 M3 DCT (Gone but never forgotten)
AW F87 M2 6MT (Current whip) |
||
Appreciate
0
|
Post Reply |
Bookmarks |
|
|