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

[Arin@APR]

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

As soon as engineering says go, I'll let everyone know.

[Marty]

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.

I'm kind of the opposite: unless it's something I can't do well myself, I'll go ahead and do it myself because I know nobody else is going to treat my car with the same respect as I will.

For example, I'll be doing the entire Stage 3 myself in my garage (as soon as it's available).

[joneze93tsi]

I'm kind of the opposite: unless it's something I can't do well myself, I'll go ahead and do it myself because I know nobody else is going to treat my car with the same respect as I will.

For example, I'll be doing the entire Stage 3 myself in my garage (as soon as it's available).

I had APR do my B8 S4's Flash & Pulley, of course that wasn't much of a gamble.
Thought about driving down to have the full stage3 treatment done on the RS as well.
Driving back home is a great way to experience the upgrade.

[hightechrdn]

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.

Why would they recommend that? As others have said, it only adds a day or two of downtime and some shipping costs. Why would a APR dealer turn down your money? And yes, I have been through the process... pulled the ECU out of my 2011 GTI and shipped it off to APR for a stage 2 tune. Wasn't difficult and APR turned around the flashed ECU the next day.


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[HBspeed]

What is the weight of the full turbo-back system compared to the stock system?

[Arin@APR]

What is the weight of the full turbo-back system compared to the stock system?

I have not weighed both systems.

[tdi-bart]

recently i got the stage1, its great, something i noticed...

@ calgary elevation 3500ft i noticed 2-3 pixels of boost missing from the graph on full throttle (when going to a sea level city i had the full graph and it was faster), i assume apr nearly maxes turbo at sea level and limits things at higher altitudes to keep it safe? btw what is stock and stage1 boost?

[Arin@APR]

recently i got the stage1, its great, something i noticed...

@ calgary elevation 3500ft i noticed 2-3 pixels of boost missing from the graph on full throttle (when going to a sea level city i had the full graph and it was faster), i assume apr nearly maxes turbo at sea level and limits things at higher altitudes to keep it safe? btw what is stock and stage1 boost?

I'm not sure what you mean by "pixels of boost". Is that an autocorrect from PSI?

Boost is basically not a set number. It will vary depending on RPM, engine load, altitude, environmental variables, modifications, etc. The ECU is smart though. In higher altitude it will compensate so it's not simply running the turbo harder and harder to reach unachievable figures.

[tdi-bart]

I'm not sure what you mean by "pixels of boost". Is that an autocorrect from PSI?

Boost is basically not a set number. It will vary depending on RPM, engine load, altitude, environmental variables, modifications, etc. The ECU is smart though. In higher altitude it will compensate so it's not simply running the turbo harder and harder to reach unachievable figures.

the bar graph in the cluster

[====== ] @ 3700ft vs [=======] @ sea level

[Arin@APR]

the bar graph in the cluster

[====== ] @ 3700ft vs [=======] @ sea level

Ah, now I've gotcha. Not sure how accurate all of that is but if you're at higher altitude, you will boost less.

[tdi-bart]

so i'm thinking if the chip increases boost, there is not enough of it anymore at higher altitudes to make chip power, but stock the car boosts more to achieve the same 360hp higher up, makes sense i think since there is that pre-chip wiggle room still

[InTTruder]

This car (the Sepang Blue in the first pick) is my car-




First-
Kudos to Doug, Keith, Grant, and the whole team at APR who did the R&D, mule/prototyping, and delivery of my TT RS. While I was galivanting about Spain and China, they not only completed the project to better-than-OEM quality, but took care of the car, detailed it, and delivered to me at a time and place of my convenience. I am VERY impressed.

Dr. Jekyll:
- Quiet idle (more about that later)
- Linear, tractable driving about town, over hill and dale, and in difficult stop-and-go traffic.
- Amazing fuel performance: I can usually hit 29 mpg avg to work, and about 24 going home (higher traffic density) on surface streets and artery roads. That makes for 26.5 mpg on the commute- not bad, in fact incredible.
- No drive-line jerkiness or clutch difficulties, including some serious time spent while hammering along during TT-E and HelenBack. The car behaves perhaps even better than OEM: I attribute this to the increased sampling and subsequent better EMS/fuel performance of the package.

- About that quiet idle:

Mr. Hyde:
- He reveals a small bit of himself when starting from cold iron- the precat has to hit a pretty good temperature before it stops barking, so on early AM starts for my commute I strap it all on, connect my ICE, start, listen for the sounds of good oil pressure, and drive away from my bedroom community. By the time I am at the main highway (300 yards or so, past 5 houses asleeping!), we are warm and running silent and deep, like an SSN-21 Seawolf.
- The throttle is linear, and I have not experienced any turbo lag as a result of the change in the performance graphs (see earlier thread discussions below). The car is SWEET JESUS quick. I haven't timed it, but my 60 y/o butt dyno wants to say 3.2 for 0-60 (0-100 for my Canadian friends), give or take. And there just is no need for winding it up to 3500-4000 and dumping the clutch. In fact, I consider that a recipe for disaster.
- The boost and torque come on RIGHT NOW. If the TT RS was a cruise missile before, it is now a hypersonic sub-orbital WMD, capable of obliterating modified Ms and Zs and Cs at will. PERIOD. The RS was already capable, even with quattro-induced understeer: you just point and play. Now the exit from an apex is monstrous, and straight line work is like reeling in small fish.
- I haven't probed top-end speed, and may not be able to, even at AMP. I had already hit 130mph (209kph) at AMP up on top of Eau Rouge after T16. That alone is significant. The braking and tires are limiting factors now, and I need to get Carbotechs and fluid as a minimum before the October HPDE at AMP.

Again- the quality of the work, the informativeness of the personnel, and the customer service for this R&D project are hallmarks of what lurks beneath the skin.

While you're at it, ask Chris Conners for his impressions. I think he drove it Wednesday night, but my 60 y/o brain is suffering from the time-warp introduced by hard pulls in the TT RS!

Git ya some, as we say down South!

[InTTruder]

so i'm thinking if the chip increases boost, there is not enough of it anymore at higher altitudes to make chip power, but stock the car boosts more to achieve the same 360hp higher up, makes sense i think since there is that pre-chip wiggle room still

Explain the science behind that please?

[InTTruder]

Your engine (and turbo) are air pumps. The pump is a delta-P (pressure) device. If the inlet pressure is lower (such as in Calgary) than at sea-level, you will see that as less boost. The APR increases the total delta-P across the engine. You will retain that performance GAIN over stock (more or less) as a function of altitude. So a chipped car will show 'more pixels' than a stock car at any altitude, unless you run out of O2.

[hightechrdn]

Is that with Stage 2 and exhaust? Or do have more than that for a low 3 second 0-60?

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[InTTruder]

Is that with Stage 2 and exhaust? Or do have more than that for a low 3 second 0-60?

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I have the full Stage 2 + RSC exhaust. The 464TQ, 430HP.

[Finite]

I didn't see this posted anywhere in the thread, but I was just wondering if the flash will update "Sport" mode only, or will it replace the mapping for both?

[Finite]

The amount of boost won't change when you go to higher elevations. The turbo needs to work harder to make the same amount of power though.

[Marty]

The amount of boost won't change when you go to higher elevations. The turbo needs to work harder to make the same amount of power though.

Which pushes the turbo into a less efficient operating point, which results in hotter air at the same boost level (less density, less mass flowrate, less power typically).

[Arin@APR]

I didn't see this posted anywhere in the thread, but I was just wondering if the flash will update "Sport" mode only, or will it replace the mapping for both?

Chipped changes are global and the Sport mode button works the same as it did before.

[Finite]

Agreed, but there are lots of variables so it's not black and white on whether or not you will see the same gains as APR did in their testing. I would assume you would make less, but I can't imagine the results would be extremely different either.

[Arin@APR]

Agreed, but there are lots of variables so it's not black and white on whether or not you will see the same gains as APR did in their testing. I would assume you would make less, but I can't imagine the results would be extremely different either.

I don't recall the S button making a lick of a difference on the dyno, stock or modified. It should be the same.

[InTTruder]

Agreed, but there are lots of variables so it's not black and white on whether or not you will see the same gains as APR did in their testing. I would assume you would make less, but I can't imagine the results would be extremely different either.

Who makes less (non-secificity there in the 'you make less')?

Pump laws are just that- laws. Thermo laws have the same characateristic. Q-dot= M-dot times delta-t (temperature) or delta-h (enthalpy of the fluid- comrpessed air is a fluid). As inlet air temperature increases, and altitude increase, the composite effect of density altitude means a decrease in power overall. By how much is dependent on the difference in inlet T and air density.

[Finite]

Who makes less (non-secificity there in the 'you make less')?

Pump laws are just that- laws. Thermo laws have the same characateristic. Q-dot= M-dot times delta-t (temperature) or delta-h (enthalpy of the fluid- comrpessed air is a fluid). As inlet air temperature increases, and altitude increase, the composite effect of density altitude means a decrease in power overall. By how much is dependent on the difference in inlet T and air density.

I was more referring to the air temps, humidity, etc not that the actual calculation would be different. Cars at high altitude will always make less power if everything else is equal.

[InTTruder]

I was more referring to the air temps, humidity, etc not that the actual calculation would be different. Cars at high altitude will always make less power if everything else is equal.

I think I mentioned several of those, and all are related essentially to density altitude.

When you say "less", you do not mean less than OEM, you mean the absolute gains compared at sea level are more the absolute gains measured at altitude in HP and TQ.

[Blkmag1c]

have the exhausts started to ship out yet Arin?

[canuckttrs]

any other video clips of the exhaust with stage 2?

[Arin@APR]

have the exhausts started to ship out yet Arin?

Yes

[Arin@APR]

For those who've worked hard for the things they own, you deserve it.

[Optimus812]

Yay, my DP just came in!

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[lpriley32]

Yay, my DP just came in!

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I will be expecting a video of just the dp shortly then! Nah, I'm just bs'ing.

[LongviewTx]

That car that you drive, ... you didn't build that! APR did.

Just say'n.

[InTTruder]

^^^^^
lolz- :p

[Optimus812]

I will be expecting a video of just the dp shortly then! Nah, I'm just bs'ing.

Get me a GoPro and I'll do one for ya All I have is my crappy cell phone camera!

[IPSA]

APR turbo back 17 lbs lighter than factory sport exhaust.