05-21-2013, 03:55 PM | #1 |
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Resonance when up shifting at full acceleration
A few days ago my dealer installed the M Perf exhaust on my 328i M Sport F31 AT8. Now there's a loud vibration/resonance when up shifting during full acceleration. I've been in Sport+ and used the paddle shifters in manual mode.
The duration is about half a second and it's very loud/strong. Is this to be expected? Has anyone else experienced this? |
05-21-2013, 04:01 PM | #2 |
Infidel
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I'm pretty sure it's meant to be that way, enjoy it
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Dec. 2022: Fully loaded Carbon Black G08 iX3 LCI M Sport Pro
Former: Glacier Ag. F31 328iA RWD M Sport oct. 2012, sold July 2022 | Sport Automatic | Adap. M Susp. | Pano. Moonroof | 20" ATS Racelight Grey w. Michelin PSS| M Sport brakes | Harman Kardon | Elec. Seats | PDC F&R | ACC Stop&Go | 335i MPE | Perf. Parts | |
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05-21-2013, 09:26 PM | #6 |
Private First Class
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i've got it too with the magnaflow cat-back, and the reverb sound seems to kick in when a shift occurs from 4000rpm or above. definitely agree with the others here that the sound is bad ass...
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05-22-2013, 04:13 AM | #9 |
Infidel
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I got the stock exhaust and hear it when im shifting in D/S, kinda goes hand in hand with the shift-kick you get when accelerating fast and shifting. And with the pano-roof open, its sounds even better unfortunately I havenīt had the time to get the M-Perf exhaust yet.
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Dec. 2022: Fully loaded Carbon Black G08 iX3 LCI M Sport Pro
Former: Glacier Ag. F31 328iA RWD M Sport oct. 2012, sold July 2022 | Sport Automatic | Adap. M Susp. | Pano. Moonroof | 20" ATS Racelight Grey w. Michelin PSS| M Sport brakes | Harman Kardon | Elec. Seats | PDC F&R | ACC Stop&Go | 335i MPE | Perf. Parts | |
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