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    Thread: How do you Flapper Mod. Our New R32

    1. 07-24-2007 11:25 AM #1
      Please, someone, anyone, buhler??? tell me how to do the flapper mod or would my dealers vw/audi guys know how to do it. not a oil change monkey
      either, one of the audi techs...can someone provide the baby steps please??
      is anything required/needed to mod it or is it just a little trick??
      I'm sure some smartypants will find a thread to look at, but I just
      want to make sure it's for the USA spec 2008 MKV R32, so ahead of
      time no need for any dumbness as I think most folks would find this
      beneficial versus spending 1000-1100 bucks right away on a new cat-back...

    2. 07-24-2007 11:42 AM #2
      Euro 3.2L A3 has a flapper, US 3.2L A3 doesn't.
      Euro MkV R32 has a flapper, will the US version have one?

    3. Member FlyingTurtle's Avatar
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      07-24-2007 11:44 AM #3
      Quote, originally posted by 3dr A3 3.2 »
      Euro 3.2L A3 has a flapper, US 3.2L A3 doesn't.
      Euro MkV R32 has a flapper, will the US version have one?

      oh noooo, once again, a mystery.....
      Hold on, I getting a clue now......
      I am totally getting a clue.......
      I am clued out
      Hope we do have it, if not we will have to have it one way or another [IMG]http://**********************/smile/emthup.gif[/IMG]
      IG: impactbumper

    4. 07-24-2007 11:45 AM #4
      hey ben, I'm the guy trading in my USA 'Sportback' (4)Door A3 3.2 for the new R...I have Millteks on mine now, it's a nice growel...
      I am not sure about the flapper, but word is it's resonated and will
      have the flapper-vacuum as well- so thats why I'm trying to get the low-down

    5. Member FlyingTurtle's Avatar
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      07-24-2007 11:46 AM #5
      Sorry to hi-jack, but 3dr A3 3.2,
      Do you have a pic of your intake? I am curious
      IG: impactbumper

    6. Member Tampavw's Avatar
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      07-24-2007 12:00 PM #6
      Quote, originally posted by ghost4 »
      Yes, I know the flapper mod has been done to death, perhaps the MkV perspective will put a new spin on it. I've done a lot of trawling and found very little on the MkV flapper - I'm guessing because they are yet to land in the U.S.?
      From what I have read the consensus is that ALL 3.2s have the diverter valve. After reading the various MkIV R32 Flapper threads I stuck my head under the car to discover that on the MkV it is not where it is under the MkIV, nor does it look the same.
      Apparently the 3.2 TT's flapper is located in a different location to the MkIVs too.
      I have taken some pics and seek the assistance of The Vortex Elders before I wield a spanner in anger.

      Clip above is as a point of reference.

      Pic above is taken from between the 2 pipes. You will note at the bottom of the pic, to the right of the 'diffuser', half of a black circular object - which I think is the diverter valve.

      Closer shot, you will note that it is black plastic rather than metal like the mkIVs.

      Closer shot from between the two pipes. The silver part at the top of the pic is part of the muffler.

      Pic above shows how the suspected flapper is attached to one of the exhaust pipes, as well as the suspected vacuum hose?

      Another close up of the flapper near the exhaust hanger.

      Final pic from the right showing the hose disappearing into somewhere.
      So what are everyones thoughts - is this the 'flapper' on the MkV and should it be dealt with in a manner similar to how it has been done in the MkIV?

      Modified by ghost4motion at 1:27 AM 1-3-2007


      Quote, originally posted by ghost4 »
      Flapper mod completed!!!
      Pulled off the vacuum tube with a pair of pliers and screwed a screw into the hose.
      I shone a torch down the right hand exhaust pipe and found that the flapper is in the open position.
      Have taken her for a quick blast and there is a little more VR6 music lower down, but it is not obnoxiously loud either, as some on the UK forum suggested.
      It's all good... now what can I do next?






      Modified by Tampavw at 12:10 PM 7-24-2007
      R32/939

    7. 07-24-2007 12:16 PM #7
      Copying vr6fanatic's post from the other thread since this is a good place to put it...
      Quote, originally posted by vr6fanatic »
      I posted this before,
      http://www.antiqpc.de/Anleitun...2.pdf

      Note that the DIY appears to be detailing how to mod the flapper so that you don't have to mess with the vacuum line and it gives the vehicle's CPU the false impression that the flapper is still working (so you won't have any stored codes).
      This is the way to do it [IMG]http://**********************/smile/emthup.gif[/IMG]

    8. 07-24-2007 12:28 PM #8
      justin, por favor, can you post the how to steps, I can't download that file due to security where I work...thanks dude-
      I appreciate you finding the DYK on that, I wouldn't want to do that differently...

    9. 07-24-2007 12:39 PM #9
      hope this works for you

    10. 07-24-2007 03:27 PM #10
      I'll find a way to translate it....espeken de'duetch not???!!
      thanks...

    11. Member GRN6IX's Avatar
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      07-24-2007 03:36 PM #11

    12. 07-24-2007 04:05 PM #12
      #1 remove flapper
      #2 take apart flapper
      #3 apply tape over hole in flapper (high temp tape or duct tape??)
      #4 put the flapper back together
      #5 reinstall flapper
      #6
      #7

    13. 07-24-2007 04:14 PM #13
      Is it that simple?

    14. 07-24-2007 06:55 PM #14
      thanks dude, wow, I wonder if it really is THAT simple...
      also, let me know what you think about the new Haldex....I will let you
      know as I know I am first on the list, if I install mine if it's here in
      time...I think it will be as I made that whole group buy thing happen--
      with the help of HPA and other car enthusiasts...

    15. 07-24-2007 07:01 PM #15
      Take my translation with a grain of salt, because well, I don't speak german
      It's a flapper though, it's not like it's the fuel injection pump or something. It couldn't possibly be that complicated. You could even do the mod easier by clamping that vacuum line shut, but that will throw a code until you open the line again. Not a CEL causing code, but a code that shows up with a VAG-COM scan nonetheless.

    16. Member vr6fanatic's Avatar
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      07-24-2007 07:22 PM #16
      It looks more of PITA, I'd go what justinperkins said. unplug and cramp the hose. [IMG]http://**********************/smile/emthup.gif[/IMG] ohh make sure you plug the actuator so no debris and rain can get in. (it happened to me) I know this is an MKIV R, but I thought this could help out too. http://video.google.com/videop...34811
      Laz

      Many people enjoy eating apples and oranges, but in the end they are still… just apples and oranges. The R32 is passion fruit. . Live Long and Prosper.

    17. 07-25-2007 02:11 AM #17
      I do hope the US will get a flapper, as it's a simple and easy thing to mod.
      If you do get it, I think there may be a simple way to switch-activate the flapper:
      Vacuum is taken from the engine's intake, and routed to the back of the car to a spherical reservoir. Between the reservoir and the exhaust-mounted flapper diaphragm (pictured above) there is an electrically-controlled "gate". When the gate closes, the valve opens, and vice-versa.
      I should be easy to tap the electrical line going to the gate, and route another electrical line back into the cabin for a three-way switch: standard/always open/always closed.
      In this photo you can barely discern the spherical reservoir; it is just to the left of the exhaust:

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      07-25-2007 11:57 AM #18
      Quote, originally posted by 3dr A3 3.2 »
      ...should be easy to tap the electrical line going to the gate, and route another electrical line back into the cabin for a three-way switch: standard/always open/always closed...

      Or you could check the color-code of the wire going to the vacuum solenoid
      at the flapper, and look for that same color-code wire in the bundle under
      the dash. Then just cut that wire and wire in the switch like the instructions
      in the MK IV R32 FAQ.
      Quote, originally posted by justinperkins »
      ...You could even do the mod easier by clamping that vacuum line shut, but that will throw a code until you open the line again. Not a CEL causing code, but a code that shows up with a VAG-COM scan nonetheless.

      Clamping the line in the MK IV R32 did not throw a code of any kind.
      Unplugging that vacuum line and leaving it open might, but clamping will not.
      There is no sensor on the flapper control sending info back to the ECU.
      --Chuck--

    19. 07-25-2007 12:25 PM #19
      Quote, originally posted by speedbump2 »
      Clamping the line in the MK IV R32 did not throw a code of any kind.
      Unplugging that vacuum line and leaving it open might, but clamping will not.
      There is no sensor on the flapper control sending info back to the ECU.
      --Chuck--

      Good to know [IMG]http://**********************/smile/emthup.gif[/IMG]

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      07-25-2007 01:16 PM #20
      Quote, originally posted by speedbump2 »
      ...There is no sensor on the flapper control sending info back to the ECU...

      I just realized i omitted an important piece of information.
      That last sentence of my previous post should have read:
      "There is no sensor on the flapper control vacuum pot sending info back to the ECU"
      Sorry,
      --Chuck--

    21. Member euro16v's Avatar
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      08-05-2007 06:37 PM #21
      Quote, originally posted by justinperkins »
      hope this works for you

      Just did this mod on my flapper. This is alot more work than necessary. Plus the tabs holding the vacuum pot to the exhaust are quite fragile and you need a very very very thin blade or screwdriver to get it off w/o cracking the unit. I realized once I got it off that the hole these guys are plugging is simply the inlet from the vacuum line. Didn't take long, but with the higher risk of cracking your flapper body, may as well just plug the vacuum line, as it would have the exact same effect. But now the sound is very very [IMG]http://**********************/smile/emthup.gif[/IMG] [IMG]http://**********************/smile/emthup.gif[/IMG]. Sucks cause I cant roll my windows down for another 2-3 days yet cause of the window tint, but doesnt sound like a mouse anymore, it really growls now.
      HEX-CAN VCDS, also 2x2 adapter for older cars
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      (work in progress)

    22. 08-05-2007 08:25 PM #22
      Cool, I think I'm just going to put a BB in the vacuum line [IMG]http://**********************/smile/emthup.gif[/IMG]

    23. Global Moderator iThread's Avatar
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      08-05-2007 09:43 PM #23
      Since the flapper is after the muffler does modding it really make a difference sound wise?
      If it does then I'm going to guess that the tip with the flapper has a different more direct path through the muffler.

    24. 08-05-2007 10:01 PM #24
      Quote, originally posted by iThread »
      Since the flapper is after the muffler does modding it really make a difference sound wise?
      If it does then I'm going to guess that the tip with the flapper has a different more direct path through the muffler.

      the purpose of the flapper is to reduce noise levels below 45 mph. When you mod it, it keeps this flapper open from 0 mph. so yes modding it does make a difference sound wise.

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      08-05-2007 10:25 PM #25
      Quote, originally posted by gizmopop »
      the purpose of the flapper is to reduce noise levels below 45 mph. When you mod it, it keeps this flapper open from 0 mph. so yes modding it does make a difference sound wise.

      Yup, I'm aware of that. I've done the 3 way switch mod to my MKIV R. But, the flapper on the MKIV r is before the muffler. This one is after which is why I had the question I did.

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