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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Butterfly valve on exhaust?



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      11-26-2006, 10:11 AM   #1
dolby
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Butterfly valve on exhaust?

This morning I was being curious as usual and found a vacuum actuated valve on the driver's side exhaust just after the muffler. Any idea when this is closed or what effect it has on the engine?
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      11-26-2006, 10:40 AM   #2
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try this thread.http://www.e90post.com/forums/showthread.php?t=33715
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      11-26-2006, 10:42 AM   #3
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The valve only controls sound levels
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      11-26-2006, 10:53 AM   #4
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FYI, I know there has been some discussion and debate about the true function of this valve. I recently discovered that the E90 electrical system may have a backpressure sensor as well.
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      11-26-2006, 11:02 AM   #5
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Quote:
Originally Posted by ksfrogman
FYI, I know there has been some discussion and debate about the true function of this valve. I recently discovered that the E90 electrical system may have a backpressure sensor as well.

Great information. I have worked on a few E90's in our shop and have not come across any type of sensor. Do you know any links regarding this information?

-Nate
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      11-26-2006, 11:04 AM   #6
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Thanks.....I may clamp the hose one day to see if there is a sound difference but if there is no performance benefits, I'll just leave it stock.


BTW, I did do a couple of searches and nothing came up. I guess I used the wrong key words in my search.
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      11-26-2006, 11:15 AM   #7
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Quote:
Originally Posted by Nate@Industry
Great information. I have worked on a few E90's in our shop and have not come across any type of sensor. Do you know any links regarding this information?

-Nate
Check this out . . .
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      11-26-2006, 11:22 AM   #8
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ksfrogman - where do you get all of this info?
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      11-26-2006, 11:30 AM   #9
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I bought the wiring diagrams for the E90. Also, bmwtechinfo.com via paid subscription.
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      11-26-2006, 11:31 AM   #10
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thanks - I'll have to check it out
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      11-26-2006, 12:33 PM   #11
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Quote:
Originally Posted by ksfrogman
I bought the wiring diagrams for the E90. Also, bmwtechinfo.com via paid subscription.
Sorry to hijack the thread but...

frogman, can you look up the wiring for the rear seat power outlets for European models? I want to install the rear outlets but without the wire taps everyone else used.

I suspect the Euro models with rear seat outlets must have a pig-tail that splits the power to the hidden front armrest ("iPod") power outlet and to the rear outlets.

I thought about running wire to the front cigarette lighter like FrankQ did when he swapped the sunglasses holder but I believe there is a cleaner, "factory" way to do this.

My dealer has been 2 weeks trying to obtain this info but no luck so far. Could you help me out, please? I need diagrams and especially part numbers for the connectors, if possible, so I can make my own pig-tail.

Thanks!
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      11-26-2006, 12:35 PM   #12
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Quote:
Originally Posted by mosport70
Sorry to hijack the thread but...

frogman, can you look up the wiring for the rear seat power outlets for European models? I want to install the rear outlets but without the wire taps everyone else used.

I suspect the Euro models with rear seat outlets must have a pig-tail that splits the power to the hidden front armrest ("iPod") power outlet and to the rear outlets.

I thought about running wire to the front cigarette lighter like FrankQ did when he swapped the sunglasses holder but I believe there is a cleaner, "factory" way to do this.

My dealer has been 2 weeks trying to obtain this info but no luck so far. Could you help me out, please? I need diagrams and especially part numbers for the connectors, if possible, so I can make my own pig-tail.

Thanks!
I'm at my office at the moment. When I get home, I'll see if I can find those diagrams for you.
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      11-26-2006, 01:48 PM   #13
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Quote:
Originally Posted by ksfrogman
I'm at my office at the moment. When I get home, I'll see if I can find those diagrams for you.
Thanks so much

I am off to change my oil at 2000miles... DYI, of course.
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      11-26-2006, 07:35 PM   #14
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Quote:
Originally Posted by mosport70
Thanks so much

I am off to change my oil at 2000miles... DYI, of course.
I cannot seem to open those wiring diagram CDs. The programs on disk require some software I either don't have, or have but haven't figured out to use them.

I'm not sure this will help. This is the best I have:
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      11-26-2006, 08:17 PM   #15
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Froggy, that backpressure sensor looks like N54 only, i.e. TURBO! =)

Our N52's don't have one, I don't think.
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      11-26-2006, 08:18 PM   #16
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EDIT! that's an M57. That's like a deisel turbo for EU market.
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      11-26-2006, 08:34 PM   #17
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Quote:
Originally Posted by ksfrogman
I cannot seem to open those wiring diagram CDs. The programs on disk require some software I either don't have, or have but haven't figured out to use them.

I'm not sure this will help. This is the best I have:

Thanks for trying. I appreciate that you took the time to look for it.

I need a little more detail of the power connection (bottom left hand side of the read console and the part numbers of the connectors.

BTW, are you missing the SVG software from Adobe to view the diagrams?

Get it here http://www.adobe.com/svg/viewer/install/ Adobe is discontinuing support for SVG on Jan 1, 2008.

May I ask where you ordered the WDS disk from? PM me if you prefer to answer that way.
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      11-26-2006, 08:50 PM   #18
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Quote:
Originally Posted by mosport70
Thanks for trying. I appreciate that you took the time to look for it.

I need a little more detail of the power connection (bottom left hand side of the read console and the part numbers of the connectors.

BTW, are you missing the SVG software from Adobe to view the diagrams?

Get it here http://www.adobe.com/svg/viewer/install/ Adobe is discontinuing support for SVG on Jan 1, 2008.

May I ask where you ordered the WDS disk from? PM me if you prefer to answer that way.
Thanks. Now that I'm home and have downloaded/installed the viewer, my wiring diagrams are at work. Ugh. I'll bring them home tomorrow.
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      11-28-2006, 02:34 PM   #19
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      11-28-2006, 03:55 PM   #20
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can this mod be done on a e92 328i?
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