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BMW 3-Series (E90 E92) Forum
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E90 AFE Question
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| 01-14-2011, 04:19 PM | #1 |
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E90 AFE Question
Is it odd for the intake to be "drone/vibration" loud at 4k~ RPMs? Its like when i punch it it gets loud until 4k when it goes REALLY loud, then it calms (in a good sounding way) down until redline... I was not sure if the sound should be constant or if this is normal? Thanks!
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| 01-14-2011, 07:23 PM | #2 | |
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| 01-14-2011, 07:58 PM | #3 |
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Just realized how I put this thread in the wrong place!
Ok, it is pretty annoying actually. I have been shifting at like 4k to avoid the drone 
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