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      08-27-2011, 03:21 PM   #1
coolhandshin
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South Korea
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Drives: '08 528i, '11 650i Conv.
Join Date: Sep 2008
Location: Seoul

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Booming sound when shifting up in SPORT mode?

I found out that NORMAL and SPORT mode definitely have different exhaust sound when accelerating.

But annoying thing is, when in SPORT mode and accelerating hard, there is this 'booming' or 'humming' sound (that fills up the ears like low bass sound) for ~0.5 seconds while the gear automatically shifts up.

NORMAL and COMFORT mode does not produce this booming sound even at high rpm shifting.
Also, if you are in SPORT mode and not in high rpm, it also does not produce such sounds.

Do you also have similar experience or is my car a little weird?
Am I suppose to enjoy this sound since it's a V8?
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