[LuvMyE92]

This may not be unique to the MPE, but since I haven't driven an M2 without it recently, I don't know. But aside from that gawdawful racket that the car makes at idle when cold, I've noticed a really loud resonance around 2800-2900 RPM when under load. It's worse when cruising in 6th (about 76 MPH). It is not related to the flaps being open or closed with the MPE.

I've only got 1000 miles on the car, and it may be getting just a smidgen better as the car gets broken-in. Just wondering if anyone else has noticed it and especially if anyone has developed or knows of a fix, and curious if it's unique to the MPE or just an F87 "feature".

2018 w/6-speed

Thanks!

[omasou]

My stock exhaust drones above 2K when cruising on the highway. Putting it in comfort eliminates it. Not sure how much that will help w/the MPE.

[DanG]

Mine did until I got rid of ASD. Now it is quite.

[jtcsifl]

I've had my car (has MPE) a year and a half and it still drones in that rpm range. Seems like coding ASD out should resolve the problem at least to some degree. GL.

[NathObeaN]

I had my M2 for about 6 months prior to installing an MPE. The MPE definitely adds a noticeable drone at that rev range. There are two "remedies":

1. Code out ASD.
2. Reinstate the resonator (the stock exhaust has one, the MPE does not). I have not tried this myself, but I have seen other forum members claim that this helps.

Bear in mind, if you perform no. 2, it means modifying both the stock exhaust and the MPE, making it difficult/impossible to put the stock exhaust back on the car and resell the MPE.

[mr_lab_rat]

The drone is mainly caused by MPE.
As NathObeaN said turning off ASD helps a bit but to completely eliminate it you would have to add a resonator. Doesn't need to be from the stock exhaust, any good quality aftermarket resonator will do.

[monochrom3]

I have MPE with stock resonator added back and ASD coded out. It still drones. I don't know how it compares without the resonator however

[Poochie]

If you're up for the challenge, you can add back some of the deleted sounded deadener..


Sound deadening https://f87.bimmerpost.com/forums/sh....php?t=1228618

[bmxcamel]

After hearing this exhaust in person, drone combined with the cold start rattle led to me get the fabspeed sport cat combined with the stock exhaust system. Drone is extremely minimal.

[LuvMyE92]

Thanks everyone for your comments. I had already coded ASD off (at least I think I did...) as one of the first things.

[LuvMyE92]

Originally Posted by Poochie

If you're up for the challenge, you can add back some of the deleted sounded deadener..


Sound deadening https://f87.bimmerpost.com/forums/sh....php?t=1228618

That's an awfully long thread, and a significant amount of work, but it appears to be worth it. I prefer the idea of factory part$ to just stuffing in dynamat wherever I can.

Thanks.

[F87_LCI]

Try adding a sport cat...you'll loosen your teeth at 3,000rpm, lol

Have almost 7,000kms on my LCI now and have had MPE, Sportcat and ASD disabled since new - so no reference as to what is like stock. You get used to how to drive the car so it doesn't stay in the "drone zone". Just pin it!

[skiparock]

Originally Posted by F87_LCI

Try adding a sport cat...you'll loosen your teeth at 3,000rpm, lol

Have almost 7,000kms on my LCI now and have had MPE, Sportcat and ASD disabled since new - so no reference as to what is like stock. You get used to how to drive the car so it doesn't stay in the "drone zone". Just pin it!

Is yours manual? Does drone go away above 80?

[GoneIn4Secs]

The drone is so annoying,

[2nd chance]

I got used to the drone (2800- 3500 RPM). Doesn't bother me anymore... except on the highway... WTF Bmw???

[DanG]

Originally Posted by 2nd chance

I got used to the drone (2800- 3500 RPM). Doesn't bother me anymore... except on the highway... WTF Bmw???

Guess I am lucky, no drone with ASD bypassed. My MPE was port installed.

[PLF69]

Let me tell you there is NO drone compared to my upgraded turbo N54 135i I had before..

I just got ASD coded back in because of istep update and noticed how more anoying it sounds, we get used to things and they bother us less or more with time.

I think MPE + ASD Off is really reasonable in terms of sports car with special order loud exhaust..

[D22M2]

Code it out ASD = no drone on mine

[BSMF87]

I have the MPE with sportcat, I did not notice drone untill I disabled ASD. I don't understand how people here are saying they have no drone after disabling ASD, ASD and drone are two different things, you can't code out drone.

[mr_lab_rat]

Originally Posted by monochrom3

I have MPE with stock resonator added back and ASD coded out. It still drones. I don't know how it compares without the resonator however

Where exactly did you re-add the resonator? Got a pic?

[GoneIn4Secs]

Well the asd would only enhance the drone sound wouldnt it, two waves hit each other and the amplitude is increased

[F87_LCI]

Originally Posted by skiparock

Is yours manual? Does drone go away above 80?

Yes. 6MT. Do you mean 80mph? We use kmph here, but the drone goes away after 3200 rpm in 6th for me...trouble is that I'm a going about 140 at that point. License goes "bye-bye" if nabbed doing anything over 150. If it starts annoying me too badly, I just gear down to 5th and keep the rpm higher (3,500+) and then no drone.