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      02-03-2013, 11:46 PM   #18
Road racin
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Drives: '13 M5 alpine white
Join Date: Jan 2013
Location: Los Angeles

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2013 BMW M5  [0.00]
2012 Jeep JKU  [0.00]
^. I have years of manufacturing experience working for Vortech on domestic and import superchargers and working with turbo companies. Both street and race cars. The noise is very unique.....

Induction noise is one thing. The "flutter" isn't induction or bypass noise. It's more like compressor surge. Not sure how these turbos are configured but many turbos now use a variable vane turbos to control boost and blow off. The mid-rpm flutter I hear reminds me of loading then unloading turbos creating compressor surge....