APR Presents: Audi TT RS 2.5 TFSI RSC Exhaust System & Stage II ECU Upgrade!

[R5T]

Stalking the remote possibility of owning a TTRS, but if I were to, this exhaust would not be
something I would add to it. Arin, anyway to like make something similar to the MK4 R32
res and muffler, possibly yeilding a more growl than fffrrrrrrruuhhhh sound...

Wonder how it would sound if you remove the reflective silencer and replace it with pipe work.
In that case you get rid of the artificial sound part.
The single pipe layout does not help either sound-wise, less volume.

[Arin@APR]

It's sounds to.....artificial

The only reason it would sound artificial is because everything else you've heard for years was actually artificial. You're hearing the engine in all of it's unrestricted glory.

Any info on power/torque gains for the full turbo-back exhaust system with stock ECU for those like myself unwilling to go for an ECU reflash until warranty expires? Thx!

I unfortunately don't have figures on stock software. I would expect a gain as the cats are removed. On smaller 2.0T applications it resulted in a solid torque increase across the entire graph.

[canuckttrs]

how about the "stage 2" tune without aftermarket exhaust?

i'm not interested in changing up the exhaust at this point, i think stock sounds perfect.

[R5T]

The only reason it would sound artificial is because everything else you've heard for years was actually artificial. You're hearing the engine in all of it's unrestricted glory.

That's a matter of opinion.

Unrestricted, i see 3 silencers.
There are a lot of reflections going on inside those.
There is nothing unrestricted about it, sound wise.

[Arin@APR]

how about the "stage 2" tune without aftermarket exhaust?

i'm not interested in changing up the exhaust at this point, i think stock sounds perfect.

You can only use the stage 1 tune with the OEM exhaust. Stage 2 is remapped for the exhaust system's main restrictions removed.

That's a matter of opinion.

What sounds good and what doesn't absolutely is a matter of opinion. What I was saying is we have a straight pipe system that's not designe to alter the natural sound of the motor. RSC only tunes out drone from inside the cabin so you're left with the natural sound of the engine and not a loud WAHHHHHHHHHHHHHHHH sound annoys you and your passengers every time you get behind the wheel.

Unrestricted, i see 3 silencers.
There are a lot of reflections going on inside those.
There is nothing unrestricted about it, sound wise.

They are not what you think.

Traditional Style Muffler:



This is how RSC looks inside:

[canuckttrs]

pardon the question but the stated results seem to be cherry picked. ie., 20db difference b/w the two.

is the goal of this exhaust to decrease sound overall or only decrease certain frequencies?

1. @94hz there is a big difference between the db readings of both exhausts with one being significantly louder.

2. @120hz or so, they look identical. granted that the competitor exhaust seems to have a larger area under the curve, they are much closer than 20db when you take into consideration all points along the curve. certainly, there is not a 20db difference at all frequencies.

3. this is a passive noise cancelling system. those are usually better for higher frequency sounds, not so much for low frequency. for these low frequencies an active cancelling setup would give much better results. more work and expense of course, just wondering why you didn't go this route. then you could program each exhaust for what sounds the customer wants to hear more of, low, mid or high or a combination of these.

4. active noise cancellation for exhaust is already in use and can offer even bigger flow gains and decrease the size/weight of the muffler itself. if you've got the time, sounds like a fun project

Active noise cancellation applied to diesel exhaust

[R5T]

What ever exhaust system you mount, the new 5 cylinder will never sound like the old ones.

http://www.youtube.com/embed/IhJMBIeCgdo

http://www.youtube.com/embed/kf0jHbY0-T0

[canuckttrs]

What ever exhaust system you mount, the new 5 cylinder will never sound like the old ones.

In a round about way that's what I was trying to get at I think.

Take out a race 5 cylinder Quattro from the 80's, get some nice sound recordings and get a sound engineer to figure out the magic frequencies, then try to duplicate that in the RS. Some folks would like that I think.

[Arin@APR]

The graph you've attached is from a 2.0T GTI.

RSC specifically targets the frequencies in which drone exists, not the entire spectrum.

[HBspeed]

I unfortunately don't have figures on stock software. I would expect a gain as the cats are removed. On smaller 2.0T applications it resulted in a solid torque increase across the entire graph.

Cool thx for the reply. If you guys could come out with a dyno for this option I'm sure many such as myself would be greatly interested.

Also one more question for you. What is the weight of the full turbo-back system vs. the stock system?

[JohnLZ7W]

In a round about way that's what I was trying to get at I think.

Take out a race 5 cylinder Quattro from the 80's, get some nice sound recordings and get a sound engineer to figure out the magic frequencies, then try to duplicate that in the RS. Some folks would like that I think.

That's exactly what I've been looking for. Have been listening to the Prospeed videos since before I placed my order. I was wondering if the higher-flow system like APRs or maybe one of the more exotic Ti systems would get closer. So far only one manufacturer has tuned the system to accentuate the higher frequency tones.

[YYC Dubber]

would be very interested to hear the APR downpipe with the OEM Exhaust/OEM Sport Exhaust. getting rid of all 3 stock cats and having only a high flow cat should change the noise signature.... perhaps the best of both worlds ?

from there an owner can still buy the cat back system if thy feel it still drones too much

[lpriley32]

would be very interested to hear the APR downpipe with the OEM Exhaust/OEM Sport Exhaust. getting rid of all 3 stock cats and having only a high flow cat should change the noise signature.... perhaps the best of both worlds ?

from there an owner can still buy the cat back system if thy feel it still drones too much

Ok, so here is one of my rookie questions/comments. From loooking under the car I see 4 cats/resonators, correct? 2 up front where the downpipe connects and 2 in the rear just before it goes to a single pipe out to the muffler? Correct? Will the APR downpipe be removing all 4 of these or just the front 2 and then connecting where the clamps are midway between the front and rear cats?

Honestly, I am not impressed with the sound/presentation of any of the exhaust systems I have seen so far. So, I was actually thinking of doing just what YYC has described above...but I was wondering exactly where the APR downpipe will link up.

Any thoughts would be appreciated.

[Arin@APR]

Ok, so here is one of my rookie questions/comments. From loooking under the car I see 4 cats/resonators, correct? 2 up front where the downpipe connects and 2 in the rear just before it goes to a single pipe out to the muffler? Correct? Will the APR downpipe be removing all 4 of these or just the front 2 and then connecting where the clamps are midway between the front and rear cats?

All 4 removed and replaced with 1.

Honestly, I am not impressed with the sound/presentation of any of the exhaust systems I have seen so far. So, I was actually thinking of doing just what YYC has described above...but I was wondering exactly where the APR downpipe will link up.

Any thoughts would be appreciated.

APR Downpipe will link up after all of the catalytic converters.

[canuckttrs]

I recall that with my RS4 and adding in milltek downpipes, the drone was awful. I had to change back to stock, just couldn't deal with it on a daily basis. Not sure if that's the case with the apr/034 or whatever dp's but it's something to consider.

[Arin@APR]

I recall that with my RS4 and adding in milltek downpipes, the drone was awful. I had to change back to stock, just couldn't deal with it on a daily basis. Not sure if that's the case with the apr/034 or whatever dp's but it's something to consider.

I'm confident our downpipes will sound similar to other TTRSs out there with high flow cats when mated to the stock catback. Any reports from those?

[Arin@APR]

Does this help?

[srq89]

Are there any acceleration numbers for stage 1 or 2 6MT RS's? I'm sure a stage 2 would be comfortably into the high 11s in the quarter, but I'm curious what 60-130s would look like...

[Quisp]

If you wre going to choose either downpipes or catback, which would benefit the car more if the resto f the exhaust were to stay factory on a TT RS

[JohnLZ7W]

If you wre going to choose either downpipes or catback, which would benefit the car more if the resto f the exhaust were to stay factory on a TT RS

The downpipe will provide the biggest gains although you probably need Stage 2 software to get the most from it. The stock catback isn't very restrictive.

[twin__turbo]

Arin, have you received any ECU's with the timing chain rattle ECU update? This is the only reason I am waiting on an APR flash because I do not want to pull the ECU twice. I'm assuming that after I purchase your software and the ECU is flashed by APR, then down the road Audi finally releases this "beta flash" to all of the TT RS's, Audi's flash will overwrite APR's flash resulting in me having to pull the ECU again to get re-flashed by you with your software that will include the timing chain update. Is this correct?

See thread #167 posted by Marty. Tried to cut and paste but the VCDS screen shots did not copy.

http://forums.vwvortex.com/showthrea...r-2k-RPM/page5

[Arin@APR]

Arin, have you received any ECU's with the timing chain rattle ECU update? This is the only reason I am waiting on an APR flash because I do not want to pull the ECU twice. I'm assuming that after I purchase your software and the ECU is flashed by APR, then down the road Audi finally releases this "beta flash" to all of the TT RS's, Audi's flash will overwrite APR's flash resulting in me having to pull the ECU again to get re-flashed by you with your software that will include the timing chain update. Is this correct?

See thread #167 posted by Marty. Tried to cut and paste but the VCDS screen shots did not copy.

http://forums.vwvortex.com/showthrea...r-2k-RPM/page5

We will only ever flash you with the current version that's on your ECU. If Audi needs to make an update, then you need to get it from them as we will not force it on your ECU. WE do this because from time to time audi will make an update that actually includes flashing other controllers or replacing parts, so we can't just assume we can bump you up to the next revision.

It's free to get the APR software again after this update, and it will then include the audi update.

WE will have dealer flashing soon.

[LongviewTx]

WE will have dealer flashing soon.

Arin, please forgive me, i had a few fat tires after work, just now, so... please define the word "soon" as used in the afore referenced quote.

i really am anxious to have that local dealer flash me.

[Arin@APR]

Arin, please forgive me, i had a few fat tires after work, just now, so... please define the word "soon" as used in the afore referenced quote.

i really am anxious to have that local dealer flash me.

I don't have a specific answer for that. I'm told it will be "ready" tomorrow if all goes to plan. It may not go to plan.

[robcorn]

I think you should run the sale again for us who have patiently waited for dealer flashes. My local dealer encouraged me not to buy it even after the second sale because of all of the delays in delivering the equipment to his store.

[Arin@APR]

I think you should run the sale again for us who have patiently waited for dealer flashes. My local dealer encouraged me not to buy it even after the second sale because of all of the delays in delivering the equipment to his store.

Something we will consider.

[Southshorettrs]

For those of us that have chosen to use a different exhaust set up on the car and may originally done the cat delete pipes. Will we be able to use the HFC set up that APR has and keep the exhaust system in the car that we currently are running? Since this is a DD for me, I do not want to go through the hassle of swapping the stock catalyst off and on each year for inspection. Or for what it's worth buy a whole new system just to be able to utilize the HFC set up. Of course this doesn't doesn't mean I won't grow tired of the one that I have now and go with a new ine down the road (only had it for a week so think its worth waiting)!

Thanks for your help in answering this. Hopefully this is not too stupid of a question. FYI I like the sound. It's raw and as we all know videos never to an exhaust system justice. Must be heard in person!

[mtbscoTT]

I think you should run the sale again for us who have patiently waited for dealer flashes. My local dealer encouraged me not to buy it even after the second sale because of all of the delays in delivering the equipment to his store.

I'm in the same boat. I was ready to spring for the flash long before it even came out. Then it did, but only if you sent your ECU into APR, the tools for the dealers were "just around the corner." Now it's been many months and we're still waiting. It's too much of a hassle for me to be without the car for several days and having to leave it across town so I've been patient....but....really, how much longer?

[joneze93tsi]

I guess I don't get the stigma about spending the 20-30 minutes and pulling it out yourself?
They'll have it the next morning, and it will be back at your door the day after.

To hold off for month after month seems silly to me.

[Arin@APR]

For those of us that have chosen to use a different exhaust set up on the car and may originally done the cat delete pipes. Will we be able to use the HFC set up that APR has and keep the exhaust system in the car that we currently are running? Since this is a DD for me, I do not want to go through the hassle of swapping the stock catalyst off and on each year for inspection. Or for what it's worth buy a whole new system just to be able to utilize the HFC set up. Of course this doesn't doesn't mean I won't grow tired of the one that I have now and go with a new ine down the road (only had it for a week so think its worth waiting)!

Thanks for your help in answering this. Hopefully this is not too stupid of a question. FYI I like the sound. It's raw and as we all know videos never to an exhaust system justice. Must be heard in person!

We've only tested our system with the stock downpipe or the stock catback and obviously as a full turboback system.

[Southshorettrs]

Arun I totally understand that, but what I am asking if alternative cat back system uses the same diameter piping to fit to the OEM piping and your piping size is no different from what I can see in measurements. Shouldnt the HFC set up mount accordingly? Or is the APR set up going down to one straight pipe, opposed to the two pipes that the OEM system uses from the secondary cats back?

[JohnLZ7W]

Arun I totally understand that, but what I am asking if alternative cat back system uses the same diameter piping to fit to the OEM piping and your piping size is no different from what I can see in measurements. Shouldnt the HFC set up mount accordingly? Or is the APR set up going down to one straight pipe, opposed to the two pipes that the OEM system uses from the secondary cats back?

From this pic it seems that if your catback mates up to the standard downpipe then the included APR adapter should work with it.

[mtbscoTT]

I guess I don't get the stigma about spending the 20-30 minutes and pulling it out yourself?
They'll have it the next morning, and it will be back at your door the day after.

To hold off for month after month seems silly to me.

I like the idea of someone else being "responsible" for work as important to me (and my car) as this. My local APR dealer has offered to R and R and send it off for me at no additional cost, but even they recommend waiting until they can do it inshop.

[Blkmag1c]

When are dealers gonna be able to do in house ecu tunes?

[joneze93tsi]

I like the idea of someone else being "responsible" for work as important to me (and my car) as this.

Good luck!