Good Job Audi

"Joe_Limon" (Joe_Limon)
12/26/2013 at 20:13 • Filed to: None

I was following a Audi TTRS the other day when I noticed something. The exhaust was only coming out of the right hand exhaust. Meaning... Either the other pipe was clogged on this new audi or... The other tip is faux... I am guessing it is the latter.

DISCUSSION (21)

AM3R > Joe_Limon
12/26/2013 at 20:16

I doubt it's fake. Especially on a TTRS.

Nick, Drives a Cobalt LT > Joe_Limon
12/26/2013 at 20:18

Kinja'd!!!

Stock Audi on the Left.

Probably just not flowing enough to the opposing side.

Joe_Limon > Nick, Drives a Cobalt LT
12/26/2013 at 20:25

But why would it only come out one side? It was cold as balls so any humidity exiting the pipe would have been visible. Even under modest acceleration the tip did nothing.

Perhaps the faux tip starts at the muffler?

PS9 > Nick, Drives a Cobalt LT
12/26/2013 at 20:25

THATS EVEN WORSE!

Hey nice true dials you got set up ther- NO WAIT let's combine both and dump them into a giant muffler and pretend we never did that with dual outlets!

Nick, Drives a Cobalt LT > Joe_Limon
12/26/2013 at 20:27

Could be a valving thing like in BMW and Lexus exhausts.

Could be the way the baffles are that one side gets a better flow

Nick, Drives a Cobalt LT > PS9
12/26/2013 at 20:28

BMW has similar setups if memory serves me right.

Joe_Limon > Nick, Drives a Cobalt LT
12/26/2013 at 20:32

I don't see any valve bodies in your picture. Maybe you are right about the baffles, and the only thing coming out the other tip is sound waves. Although you think baffle issues would bias the exhaust distribution, and not cut it off completely.

beardsbynelly - Rikerbeard > Joe_Limon
12/26/2013 at 20:32

a guy at work had one, both worked on his.

Nick, Drives a Cobalt LT > Joe_Limon
12/26/2013 at 20:33

Did he go WOT at all?

Joe_Limon > beardsbynelly - Rikerbeard
12/26/2013 at 20:35

You actually sat down and tested them for shits and giggles?

Joe_Limon > Nick, Drives a Cobalt LT
12/26/2013 at 20:37

Nope, it's snowy/icy, even awd isn't enough traction for that.

Nick, Drives a Cobalt LT > Joe_Limon
12/26/2013 at 20:39

I would bet that either A there was not enough flow to get through the other pipe or B one side just resonates sound.

red014 > Joe_Limon
12/26/2013 at 20:49

Doesn't the TTRS have a Sport button that livens some things up, plus makes the exhaust louder? Maybe that's when both tips are active? I don't really know, just a thought.

A3R0 > red014
12/26/2013 at 20:52

^what he said. I know BMW does it, so why wouldn't Audi?

beardsbynelly - Rikerbeard > Joe_Limon
12/26/2013 at 21:01

no, but he went on at great length how the exhaust valve solenoid doesn't open when the engine is cold. It must be on the left hand side, that's probably what you saw.

edit : apparently this is how you fix it so it stays open all the time:

Kinja'd!!!

image from ttforum.co.uk

STAGGERED-6 > Joe_Limon
12/26/2013 at 21:07

Exhaust flapper, there's a butterfly that directs the flow through a single pipe at certain rpms. Had the same issue with my R32, you can actually see an uneven build up of carbon on the predominantly open pipe. Pinching and clamping the vacuum tube to the flapper is the poor man's solution, but almost any aftermarket exhaust will delete the flapper altogether. Guess Audi and VW didn't want to offend anyone's noise related sensibilities.

drunkenup2 > Joe_Limon
12/26/2013 at 21:10

.. its an exhaust valve that closes the exhaust under low speed/low load conditions or whatever.. a lot of cars have this feature and block an exhaust outlet

Alex87f > Joe_Limon
12/27/2013 at 07:41

What could also be is that this was a fake TT RS.

I've seen some people do this. Take a bone stock 1.8t or TDI TT (with exhaust only on the right side), add all the RS bodykit, including the rear bumper but cheap out on the exhaust and only put a tip on the left side. Oh and don't forget the logos. As many of 'em as possible.

A great way to waste 8 - 10 000$ just to make people think you're rich.

Joe_Limon > Alex87f
12/27/2013 at 09:44

Oh right, it must be a VW group thing... kind of like how people rebadge base 911's.

jdrgoat - Ponticrack? > PS9
12/27/2013 at 14:12

True duals on an inline engine, you say...?

With-a-G is back to not having anything written after his username > PS9
12/27/2013 at 17:14

Fundamentally no different from an X-pipe exhaust. The increased diameter of the unified portion doesn't restrict flow any more than two individual pipes, if they chose the diameter to be sqrt(2) times as large.