09-04-2023, 05:27 PM | #1 |
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Resonator Delete Question - possible vibration at 3k rpm
I did the resonator delete on my 2018 M550.
At idle..it sounds great. Very deep and throaty. the only issue i have noticed is that while driving - at heavy load / mostly full throttle, at about 2500-3000 rpm, the car makes this annoying noise that sounds to me like something is vibrating…as soon as I pass 3k rpm it’s gone. It’s not a droning noise… but i am starting to wonder if this is some of the resonation that BMW tuned OUT of the system with the resonators? Does anyone get a noise like this between 2000-3000 rpm? It only happens under load..if I am in park and just revving up - it sounds GREAT… not a touch of this noise I am describing. It only happens when the car is under load / in gear ‘ actually driving. It usually will not occur at partial throttle, you need to be on the gas fairly hard at LOW rpm, passing between 2000/2500-3000. And you REALLY hear it. Almost to me like a farting noise…. It does not sound good. maybe it’s something vibrating.. I an try to get a sound clip if no one has any clue what I am talking about.
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Sean
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09-06-2023, 12:09 PM | #2 |
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Xpipe or straight pipe?
I had straight pipe first but changed to x pipe as the noise was bad at 3-3.5K rpm
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09-06-2023, 01:11 PM | #3 |
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I just had a muffler shop put in straight pipes that replaced the OEM resonators..but they do not appear to be pipes..meaning each pipe is totally separate from each other.
It sounds GREAT 90% of the time..but right at 3k rpm is makes this almost farting noise that is super obnoxious.. Woudl this be remedied by putting in an X pipe? I could buy the Dinan one but it’s $$. Can a muffler shop just modify what I have and hav ethe pipes meet in the middle and merge?? Did changing to the Xpipe get rid of that sound? I assume you had the same sound… and know what I”m talking about? What kind of X pipe did you do? Prefab one like Dinan or did you just have it homemade?
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10-05-2023, 12:07 AM | #5 |
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I had my resonator delete done and the shop did NOT do an X pipe. That was the problem. I went back and had them add the X pipe in the middle and it took away the nasty farting sound at 3k. it did get quieter and less loud..but sounds similar. Overall much better.
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