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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > No upshift burble on 6MT
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      01-30-2013, 05:00 PM   #1
RadRyDawg
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No upshift burble on 6MT

I remember hearing a distinct burble on upshifts in the sport line 8AT I test drove, but it isn't present on my m sport 6MT. What's up with that?
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      01-30-2013, 08:28 PM   #2
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you sure its in sport or sport +?
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      01-30-2013, 10:09 PM   #3
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Redline baby, redline!
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      08-13-2013, 09:26 PM   #4
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I've experienced burbling even in eco pro while letting off the gas to upshift. What is causing this burbling sound? It may be totally normal but I have this notion that it's burning more fuel than necessary thus the popping and burbling??
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      08-16-2013, 08:50 AM   #5
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Redline baby, redline!
no need, i think N55 runs out of steam at about 5500 - 6000 rpm
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      08-18-2013, 07:36 PM   #6
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Open up the driver's side exhaust pipe. It's wired shut except when you stomp on it. The burble is more pronounced with both pipes open all the time.
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      08-19-2013, 08:45 AM   #7
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Open up the driver's side exhaust pipe. It's wired shut except when you stomp on it. The burble is more pronounced with both pipes open all the time.
Search, golf t mod for F30, 5 min process and you'll hear that plus deeper exhaust note
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      08-20-2013, 08:20 AM   #8
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My car burbles on upshifts and when I lift off throttle in sport mode. Very very lovely.
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      08-20-2013, 08:24 AM   #9
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The burble between shifts in the sport automatic was not from lifting off of the throttle in sport mode ( and I agree, it is lovely). Maybe it had the m perf exhaust. This was an early early production car... Maybe they got rid of it
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      08-20-2013, 11:53 AM   #10
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My 8AT M Sport burbles on throttle lift. It sounds awesome, makes the 335i sound really mean. Regular 335i exhaust. I like that I can essentially choose when it burbles. Will only make those nice sounds in sport or sport + modes on my car. At least those are the modes where I really notice it.
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