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Afternoon All,

Just have a quick question. Whenever I use the S-button and slow down from 4th to 3rd the exhaust valve seems to close and re-open when I slow right down into 1st gear. For example when I slow down for a speed bump, I notice the "metal clanging" noise when the valve opens. Anyone else have this problem (or indeed if it is one)? I can't seem to find any info on how the valve works. I'd have assumed it's open constantly when S-button is pressed.

Cheers,
Chris

i have assumed its vacuum operated like the R32 butterfly valve, but on a switch rather than throttle position

i cant say i have noticed this on mine

Well having phoned Audi, apparently they don't know how the valve works either! All I wanted to know was whether the valve is supposed to stay open the entire time the sports button is pressed? I have to take it in so they can see it for themselves.... seems a bit extreme for just a "yes" or "no" answer!

i would try mine to see if it does it ...

Going back to 2003, and the TT MkI with the 3.2 quattro DSG - the 'worst valve would open full just like you say to make the car burble more as you slow to a stop. Makes pedestrians take notice. I believe it was done on purpose. I suspect it's the same here.

Well that sounds about right then drybeer. Have to say, it does sound good when it burbles.....although the boy in me would like it to be louder!

biker78 wrote: although the boy in me would like it to be louder!

You can't be driving fast enough...

dont you think it works in a similar manner to the Rs4 one? When you idling and at a stop, the exhaust valve is open when the sport button is pushed but closes until certain revs then re-opens... so you dont get a drone at low rpm and high way speeds... SO it only opens when really pushing or at a stop when you can physically hear the change

im pretty sure mine got a lot louder as soon as pressed the button even if stationary

Dave_Hedgehog wrote:im pretty sure mine got a lot louder as soon as pressed the button even if stationary

That's how the RS4 one works too.

rpm < 1000, valve open - so pressing the S button at tickover opens the valve and makes it louder

3000 < rpm < 1000 AND 3 <= gear <= 1, valve closed
rpm > 3000 AND 3<= gear <= 1, valve open - so in lower gears the valve is only open at higher rpm

gear >3, valve open - so in higher gears the valve is always open

ill test it

give me 3-4 months lol

PetrolDave wrote:

Dave_Hedgehog wrote:im pretty sure mine got a lot louder as soon as pressed the button even if stationary

That's how the RS4 one works too.

rpm < 1000, valve open - so pressing the S button at tickover opens the valve and makes it louder

3000 < rpm < 1000 AND 3 <= gear <= 1, valve closed
rpm > 3000 AND 3<= gear <= 1, valve open - so in lower gears the valve is only open at higher rpm

gear >3, valve open - so in higher gears the valve is always open

Cheers PetrolDave.....that's what I was looking for! I think that's the deal with this one. Cheers,

Dave_Hedgehog wrote:im pretty sure mine got a lot louder as soon as pressed the button even if stationary

Yes it does get louder me and Drybeer tested it on one last week..

Moschop5 wrote:

Dave_Hedgehog wrote:im pretty sure mine got a lot louder as soon as pressed the button even if stationary

Yes it does get louder me and Drybeer tested it on one last week..