hoofboy Posted February 23, 2006 Report Share Posted February 23, 2006 DukeDesmo was telling me yesterday about a mod you can do to the 3.2 exhaust to improve the sound of the V6. I understand about the valve opening at certain speeds revs etc. What I want to know is how people went about doing the mod. I know some people have fitted a fancy switch etc, I won't be able to do this, i'm more interested in just a simple clip or tape method. would appreciate any advice or pics etc. Thanks people Link to comment Share on other sites More sharing options...
harddrive Posted February 23, 2006 Report Share Posted February 23, 2006 I too am interested in this. How much better is the sound with the valve open? Link to comment Share on other sites More sharing options...
DukeDesmo Posted February 23, 2006 Report Share Posted February 23, 2006 The valve is a 'butterfly' valve in the left side tailpipe - you can see it down the pipe, if you grab the linkage on the side of the pipe you can turn it by hand (make sure pipe is cold!) Simple way without messing with switches etc (and even if you do fit a switch, how do you know it works - as the valve only shuts when the car is moving!) is to physically block the valve in the open position. To do this, first you need to disconnect the linkage so that the solenoid does not operate the valve - the linkage is a thin piece of metal (like thick wire) which is attached to a solenoid, above the pipe, and threads through a lever on the shaft that the valve is on, you can carefully pull out this wire from the lever and bend it away from the lever so that it does not touch it but the wire can still go up and down with the solenoid (I understand that if you disconnect the solenoid it shows an error on the diagnostics?) - maybe you can change the programme with Vagcom or similar? Once disconnected the valve is loose, so you need to fix it in the open position (or cut it off completely), I did consider a spot weld on the linkage to hold it but decided to do something non-permanent so I clamped it in place (open) to do this I got a Jubilee clip that fits round the part that the lever is on and made a 'Z' shaped bracket from a piece of Stainless Steel welding wire that fits through the lever (in the same way as the original linkage) but then sits under the jubilee clip, fitted it all loose then turned it so that the valve was open and locked it up at that - I can refit all back to standard in a couple of minutes if I want to. I read that someone had tested an R32 and that it made more power this way but I can't say I've noticed any more power (it would only be a small increase, if any) but it certainly sounds nicer and is still not loud in any way but a free-er flowing exhaust should be a good thing so I'm happy with the difference. I did try to take some pics but it's difficult to do in a dark garage and they didn't turn out too good, but it really is a very easy mod to do. Link to comment Share on other sites More sharing options...
hoofboy Posted February 24, 2006 Author Report Share Posted February 24, 2006 Superb advice Duke, thanks for posting that, top info! Link to comment Share on other sites More sharing options...
hoofboy Posted February 25, 2006 Author Report Share Posted February 25, 2006 Have disconected the linkage, was very easy and reversable, just figuring a way to secure the valve open now, considering getting the faithful wire coat hanger out in a minute!!! Link to comment Share on other sites More sharing options...
corindm Posted February 25, 2006 Report Share Posted February 25, 2006 whats the technical reason for the value being there in the first place? Link to comment Share on other sites More sharing options...
Biscuits Posted February 26, 2006 Report Share Posted February 26, 2006 Purely noise emmission control... same as on the S4, has one in each tail pipe. Simply disconnecting the vacume pipes makes them stay open. Link to comment Share on other sites More sharing options...
hoofboy Posted February 26, 2006 Author Report Share Posted February 26, 2006 Have decided against the coat hanger and have, using electric wire!, tied the valve arm to the bracket next to it. The valve now stays open but is not locked as far as it can go, does this matter? Link to comment Share on other sites More sharing options...
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