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      04-05-2018, 10:13 AM   #30
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Drives: 2013 328i xDrive
Join Date: Jun 2017
Location: New Jersey

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Originally Posted by lonecitizenfour View Post
Where does the valve flutter come from? That noise sounds exactly like compressor surge... is there another part that is a fan somewhere and has air hitting from the blowing side (i mean even if that's not turbo, it can't be good no?)

that's kind of what I was thinking. I know compressor surge is no good, but that's the flutter you hear on supras and the like. if the DV+ causes this, then I'm definitely going to avoid it. but if not, like you asked, where is this flutter coming from? what valve, the diverter valve?
2013 328i xDrive N20 8AT | Bootmod3 Stage 2 OTS 93oct | Bootmod3 8AT TCU flash | VRSF Street 5" HD Front-Mount Intercooler | VRSF Catless Downpipe | 2.5" custom exhaust cutout | M Performance Exhaust | NGK L/I Spark Plugs | Dinan 20" Wheels Wearing Michelin PS4S's | Dinan Springs and Bumpstops | F80 Style Decklid Spoiler | Debadged | F80 Style Grille | Various Interior Bits |