BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

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      04-03-2014, 07:06 PM   #309
MDRex
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I just did this by disconnecting the plug in the trunk. Works with no errors so far. Noticeable difference in sound at lower RPMs with the window open, can't tell a difference with the window closed. Overall very happy for the 5 minutes it took.
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      04-03-2014, 07:30 PM   #310
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My young neighbors from Germany asked if my exhaust was stock, I said yes but they looked puzzled, and all I did was stick a golf tee in a hose.
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      04-04-2014, 09:04 AM   #311
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I know that when some design exhausts and headers......they lenghten/shorten the tubes, use larger/smaller diameters...etc to get gains in certain areas.
So I ask...does the flap open and close under certain loads, rpm's and such or does it stay closed at low rpm's then open above that with no effect on other gains?
I just wonder if doing the mod you might loose out a smidge somewhere else like low end torque and just gaining sound.
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      04-26-2014, 06:25 PM   #312
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Finally got around to doing this mod last night. I tried 3/16 vacuum line caps and they were too big. However, 5/32 worked perfectly on my 2009. Took me less than a minute once I got the right sizes. Anyway great little mod. Gives the car a nice deep sound below 3000 rpm. I should have done it a long time ago.

BTW I decided to use the vacuum line caps and plug rather than the zip tie because I didn't want to cause the line to crack or split in case I want to go back to stock. With the caps and plug it will be easy to reconnect later if I decide to do so.
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      05-03-2014, 11:24 AM   #313
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here is a clip of the sound. car is completely stock... I just bought it a week ago.

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      05-03-2014, 08:56 PM   #314
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I checked codes the other day with my AP and there is a code showing for the exhaust flapper plug, but no CEL.
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      06-20-2014, 03:45 PM   #315
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I have a 135is, which means I have the PE. I definitely hear some metal rattling when I start the car or am moving at slow speeds/low RPMs. If I don't have a flap, what am I hearing?

Edit: It sounds EXACTLY like this: (0:39 and 0:43)
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Last edited by Worra; 06-20-2014 at 03:52 PM.
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      06-20-2014, 03:57 PM   #316
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Quote:
Originally Posted by MDRex View Post
I just did this by disconnecting the plug in the trunk. Works with no errors so far. Noticeable difference in sound at lower RPMs with the window open, can't tell a difference with the window closed. Overall very happy for the 5 minutes it took.
Where is the plug in the trunk? I don't see it under the left light bulb access cover. Do you need to remove or move the entire left side liner to gain access? Just want to confirm before I start pulling the center edge cover to lift this up.
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      06-21-2014, 10:13 AM   #317
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Quote:
Originally Posted by Worra View Post
I have a 135is, which means I have the PE. I definitely hear some metal rattling when I start the car or am moving at slow speeds/low RPMs. If I don't have a flap, what am I hearing?
Wastegate actuator rattle.

https://www.google.com/search?client...+rattle&rls=en

https://www.google.com/search?client...UTF-8&oe=UTF-8
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      07-08-2014, 10:08 AM   #318
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Quote:
Originally Posted by Horigan View Post
Where is the plug in the trunk? I don't see it under the left light bulb access cover. Do you need to remove or move the entire left side liner to gain access? Just want to confirm before I start pulling the center edge cover to lift this up.
It's behind the left side liner. Not hard to get too if you remove the fasteners. There is a link someplace in this thread that has some pics of the connector.
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      08-11-2014, 05:28 AM   #319
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I did this mod today... and it does sound diferent... BMW always do this. on my Mini GP, they also did this to the intake of the car. I also removed that to have that beutiful sound of the supercharger!

But just so oyu know. I have the BMWPE exaust and it has the Flap as well.
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      08-11-2014, 08:10 AM   #320
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Quote:
Originally Posted by Soccs
I did this mod today... and it does sound diferent... BMW always do this. on my Mini GP, they also did this to the intake of the car. I also removed that to have that beutiful sound of the supercharger!

But just so oyu know. I have the BMWPE exaust and it has the Flap as well.
If you have the PE, it doesn't have the flap.
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