Mysterious Audi group exhaust
Discussion
I was at a garage doing a couple of bits and pieces for the owner, and I saw a battered exhaust leaning against a wall.
It was a twin pipe system, so it branched into two separate sides, each with a back box and a single oval chrome tip, but, and this is the odd bit, there was a ball shaped resonator that tied into the system connecting just before the final tail pipe trim.
Not only was it a strange place to have a resonator, literally about 4-6 inches from the the final exit, but also each resonator had a stainless 2 wire component screwed into the resonator.
There was a quad ring Audi logo stamp on it, so something from the VAG group.
Are there any Audis with "piped" exhaust sounds into the stereo?
Can anyone figure out what car it came from, and what the resonators were for, and what the sensor was?
It was a twin pipe system, so it branched into two separate sides, each with a back box and a single oval chrome tip, but, and this is the odd bit, there was a ball shaped resonator that tied into the system connecting just before the final tail pipe trim.
Not only was it a strange place to have a resonator, literally about 4-6 inches from the the final exit, but also each resonator had a stainless 2 wire component screwed into the resonator.
There was a quad ring Audi logo stamp on it, so something from the VAG group.
Are there any Audis with "piped" exhaust sounds into the stereo?
Can anyone figure out what car it came from, and what the resonators were for, and what the sensor was?
Sports exhaust on my RS4 and my old RS5 connects to a device in the boot that opens the baffles to make it more antisocial. Are they not vacuum lines?
Not a technical person so have no idea on how it works but I know there's a nifty trick that involves plugging the lines so that the exhaust is left permanently in p
s off the neighbours mode.
Not a technical person so have no idea on how it works but I know there's a nifty trick that involves plugging the lines so that the exhaust is left permanently in p
s off the neighbours mode.
djc206 said:
Sports exhaust on my RS4 and my old RS5 connects to a device in the boot that opens the baffles to make it more antisocial. Are they not vacuum lines?
Not a technical person so have no idea on how it works but I know there's a nifty trick that involves plugging the lines so that the exhaust is left permanently in ps off the neighbours mode.
You can see the vacuum actuators int the pic above.Not a technical person so have no idea on how it works but I know there's a nifty trick that involves plugging the lines so that the exhaust is left permanently in p
s off the neighbours mode.The electrical plug was back on the sphere part.
TheEnd said:
....and I think I have it-
That was pretty much what I was looking at!
Looks like the piped in exhaust noise idea is catching on!
Not "piped in". Those resonators will have less silencing effect than the main boxes, so - under full beans - a flap valve will open and let gases pass through them rather than the main boxes, increasing the tailpipe sound.That was pretty much what I was looking at!
Looks like the piped in exhaust noise idea is catching on!
Or, more cynically, under light throttle conditions the valves will close and keep drive-by decibels within legal type-approval limits.
Are they a throughput design though? Hard to see from that picture but they look like they are only connected to the tip of the exhaust, not pre-silencer, so could nto act as a 'bypass' for the main silencer box.
If they are only connected to the tip then it being a resonance chamber convenient to pick up an exhaust sound with a microphone makes sense.
If they are only connected to the tip then it being a resonance chamber convenient to pick up an exhaust sound with a microphone makes sense.
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