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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > how to have this awesome sound between shifting?



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      03-09-2011, 05:47 PM   #1
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how to have this awesome sound between shifting?

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      03-09-2011, 05:48 PM   #2
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LOL
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      03-09-2011, 05:53 PM   #3
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seems that most double clutch transmissions make a pop sound when they change gears
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      03-09-2011, 06:14 PM   #4
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isn't it dropping gas on the exhaust to make that noise?
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      03-09-2011, 06:18 PM   #5
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Are you talking about the BOV? or that really annoying whining sound?
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      03-09-2011, 06:27 PM   #6
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Quote:
Originally Posted by HudsonE92 View Post
Are you talking about the BOV? or that really annoying whining sound?
Fart sound
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      03-09-2011, 06:29 PM   #7
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It happens on DCT cars. Can't fake it on a step or manual.
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      03-09-2011, 06:34 PM   #8
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I believe that the drop of petrol added to the exhaust during each gear shift to have that sound. Its an audi-thing.
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      03-09-2011, 06:36 PM   #9
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Supercharger whines sound soo good!!
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      03-09-2011, 06:36 PM   #10
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Quote:
Originally Posted by Blindrage606 View Post
I believe that the drop of petrol added to the exhaust during each gear shift to have that sound. Its an audi-thing.
bmw x5m has the same thing happens when changing gears
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      03-09-2011, 06:42 PM   #11
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Isnt that the turbos dump valve ? (maybe thats not the right english word)
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      03-09-2011, 06:55 PM   #12
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most Double Clutch tranny cars do that, there are a few members on this board with aftermarket exhaust with DCT, sounds the same..
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      03-09-2011, 07:01 PM   #13
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Small drop of fuel in the exhaust manifold for the sound between gears.
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      03-09-2011, 07:04 PM   #14
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They inject fuel into the exhaust (not onto LOL) to make that sound inbetween shifts. Audi does this on their V8s
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      03-09-2011, 07:14 PM   #15
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I have a nagging feeling that Jeremy Clarkson spread what sounds to me like total BS regarding the droplet of fuel. My car makes that same exact noise as do other DCT BMWs. It has to be something else that causes it...like the sudden milliseconds interuption of fast exhaust flow through the pipes.
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      03-09-2011, 07:36 PM   #16
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Queue up a fart and let it go as you shift? The supercharger is bad ass though.
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      03-09-2011, 07:48 PM   #17
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That sounds horrible LOL, but the whine sounds amazing
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      03-09-2011, 07:51 PM   #18
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Quote:
Originally Posted by Edward View Post
I have a nagging feeling that Jeremy Clarkson spread what sounds to me like total BS regarding the droplet of fuel. My car makes that same exact noise as do other DCT BMWs. It has to be something else that causes it...like the sudden milliseconds interuption of fast exhaust flow through the pipes.
i dont think it really drops fuel into exhaust...must be other stuff
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      03-09-2011, 08:05 PM   #19
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I test drove one of these this weekend and the salesman said it's the backpressure from the supercharger. On stock, it's more of a "pop" than a fart.
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      03-09-2011, 08:12 PM   #20
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Sounds like it's something from the throttle plate closing [and venting any remaining boost] and the fact that the car shifts so fast.. ?


But on the upside, if someone says "did you fart?" you can say no that was an Audi S4.
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      03-09-2011, 08:17 PM   #21
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Quote:
Originally Posted by ecjohnston View Post
Small drop of fuel in the exhaust manifold for the sound between gears.
+1
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      03-09-2011, 08:21 PM   #22
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someone needs a Gas-X. - me no like.

the supercharger sounds sick though....
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