The APR Stage 3 DTR8868 Turbocharger System is Here

[S4James]

Anyone have quarter mile times yet on the APR stage 3 kit?

One guy on FB reported an easy mid to low 10 on E, low 11 on 93. This was on a car with no prep, just street trim.. I think high 10s are in the realm of possible on pump gas.

[Beagz_b9_s4]

Anyone have quarter mile times yet on the APR stage 3 kit?

Best out of 4 runs was an 11.39, couldn't keep tires from spinning, on 93 octane.

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[Jetta03]

Gotcha. So this kit offers a couple of tenths improvement in quarter mile times over a similarly fueled stage 2 flash basically.

[davesxx01]

Gotcha. So this kit offers a couple of tenths improvement in quarter mile times over a similarly fueled stage 2 flash basically.

Huh? Read the drag racing thread? Saxton pulled a 10.5 @ 130 full weight with stock cat. Did it with a 2000’ DA elevation difference over The 034 car that was running drag radials and 200+ lbs weight reduction too.
I’d say that’s hella good over a Stage 2 car!

Looks to be about a full second and 10 mph faster than a similarly equipped stock turbo car (Dimitrys)

[GoCougs1234]

Gotcha. So this kit offers a couple of tenths improvement in quarter mile times over a similarly fueled stage 2 flash basically.

Stage 2? This stage 3 kit on the lowly 91 tune is 150+ hp (ave) over stock 4,000-7,000 RPM which in the S4 is going to easily be 11.0-11.2 with a good launch. Plus of course, it's emissions legal, not stinky and (on 91 at least) requires no other aftermarket fiddly bits (HPFP, HF cat, injectors).

APR's still working on cracking the encryption on my B9.5 TCU box code and when done, I'm first in line! (Albeit with an SQ5.)

[AldermanToffee]

Stage 2? This stage 3 kit on the lowly 91 tune is 150+ hp (ave) over stock 4,000-7,000 RPM which in the S4 is going to easily be 11.0-11.2 with a good launch. Plus of course, it's emissions legal, not stinky and (on 91 at least) requires no other aftermarket fiddly bits (HPFP, HF cat, injectors).

APR's still working on cracking the encryption on my B9.5 TCU box code and when done, I'm first in line! (Albeit with an SQ5.)

Right, so a couple of tenths improvement over Stage 2.

[GoCougs1234]

Right, so a couple of tenths improvement over Stage 2.

No.

[Arin@APR]

APR DTR SQ5 vs big turbo rs7:

https://www.instagram.com/reel/C52Hx...Ywbm9xenhkdQ==

[davesxx01]

Come on Arin, the DTR is “only a couple tenths improvement over Stage 2”,,, per some people!
ROTFLMAO 🤣

That said, I want to be clear that I take nothing away from AT’s custom build or anyone’s Stage 3 build. Facts are simple, APR chose to build from scratch their own new, not rebuilt turbo, albeit a hair smaller (flowing) than all the other options out there and decided to tune it not as aggressive than all the other kits available out there. Using the factory cat and keeping spikes and peak torque to a respectable (safer?) level is impressive in itself!
Personally, I’d get this kit tomorrow but I spend 90% of my driving below 2500 rpm and want to see more reviews on daily drive ability before I jump.
Looking forward to reviews from S4James in his install!

[S4James]

looking forward to the install next week. Hopefully it goes well.

[Kedawerx]

looking forward to the install next week. Hopefully it goes well.

I hope it goes well.

After the install, will you give your impression of how the turbo lag changes?


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[S4James]

If you look at the published dyno numbers, it looks like 1000RPM hit. but the HP is like a freight train right up to 7k. This is a very typical result that i have seen for stage 3 turbo cars over the years.

[Jetta03]

I mean a stage 2 93 octane tune with required hardware seems to be running in the 11.6/11.8 range quarter mile from what I've read (please correct me if I'm wrong).
Someone above reported a best of 11.39 with the apr stage 3 kit.

Really seems like a few tenths difference overall. Not saying that is good or bad, just looking for an objective report here.

[davesxx01]

I mean a stage 2 93 octane tune with required hardware seems to be running in the 11.6/11.8 range quarter mile from what I've read (please correct me if I'm wrong).
Someone above reported a best of 11.39 with the apr stage 3 kit.

Really seems like a few tenths difference overall. Not saying that is good or bad, just looking for an objective report here.

Understood. Hard dive into the drag racing thread shows average Stage 2 times in the range you said with a mph of 115-119 mph range whereas the only APR Stage 3 car on the list posted a 10.5 @ 130 mph! That’s a good 10 mph faster! Full weight/no slicks. The person above stating he got a best of 11.39 with massive wheel spin only shows bad surface or tires on their runs. Needs lots more info.
The video Arin linked above clearly shows at least from a dig their system better than a big turbo RS car,,,, I’ll also add that from a 60 (100kph) roll I guessing that big turbo RS would of pulled hard on that APR car!

[Jetta03]

Agreed. Fuel is also key, I'm looking 93oct in particular. If memory serves that single APR stage 3 was E85.
And there seem to be stg2 flashes running on e85 that are also running 10.9/11's.

It is awesome to have such a dataset to see how these setups are performing in real life.

[S4James]

Agreed. Fuel is also key, I'm looking 93oct in particular. If memory serves that single APR stage 3 was E85.

its difficult to compare like for like when you have factors like tires, weight, prep, conditions, track vs street... not to mention a really small dataset of APR cars reporting results. I dont feel that "a few tenths in the quarter" is a fair conclusion. Also consider that APR has a different approach to their tunes. Stock downpipes, and being 100% street legal.

Maximizing performance of this car without sacrificing comfort, or attracting the eye of our local emmisions karen squad was my goal here, APR was the obvious choice. The results ive seen so far have been very encouraging. And it doesnt look like they left much power on the table.

[GoCougs1234]

I mean a stage 2 93 octane tune with required hardware seems to be running in the 11.6/11.8 range quarter mile from what I've read (please correct me if I'm wrong).
Someone above reported a best of 11.39 with the apr stage 3 kit.

Really seems like a few tenths difference overall. Not saying that is good or bad, just looking for an objective report here.

I think there's some inexperience at play (not yours).

11.39 is simply wrong, or in the very least a time of said vehicle not driven and/or set up correctly. On just the 91 tune, the +150 hp average over the meat of the power band = ~11.0 car easily.

Also, the quicker you go, the bigger the gap difference. 11.0 vs. 11.5 is a WAY bigger gap ("quicker") than 15.0 vs. 15.4 (like at least double the gap) for example.

I'm on board but APR has yet to crack my TCU (and the TCU tune is needed for this stage 3 kit (much different shift points and higher red line)).

[handspin]

most emissions legal stage 3

(some undetermined tenths quicker than a downpipe and tune)

APR now has their flash tool ready

feel like they waited until the early birds did their thing, then released the most reasonable tune

[SQ5onFIRE]

https://www.audizine.com/forum/showt...-Stage-3-Build

[PineTree]

Love to see the continued innovation of the platform. It's this type of competition that'll keep things going strong. Keep at it!

[ontunerow]

https://www.audizine.com/forum/showt...-Stage-3-Build

Is that stock tune 330 wheels? Would be somewhat inflated.

[SQ5onFIRE]

Yes it is stock. I’m more concerned about the gain when everything is installed vs the number itself. Will be at the same dyno when it’s all on to keep it the same.

[GoCougs1234]

Yes it is stock. I’m more concerned about the gain when everything is installed vs the number itself. Will be at the same dyno when it’s all on to keep it the same.

Yes - relative HP/TQ measurements are all chassis dynos are good for, and even then the +/- won't be tiny if the vehicle is unstrapped from the dyno between measurements.

[GoCougs1234]

My review in the B9 Q5 forum: https://www.audizine.com/forum/showt...Stage-3-review

[SQ5onFIRE]

I have my draggy runs posted for 93 octane with fuel pump on this link. This forum keeps saying error uploading photos. When it lets me I will post here as well but if anyone wants to take a peek.

https://www.audiworld.com/forums/q5-...build-3070901/

[Gunnarrrrr]

it’s an old school bbs board you don’t upload photos to it you link them with bbs code smh


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[SQ5onFIRE]

Yea well Audi world is soo much easier I have no idea what you even said

[GoCougs1234]

it’s an old school bbs board you don’t upload photos to it you link them with bbs code smh


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Which is an old school "bbs forum" - this site nor AudiWorld? (TBH, kinda surprising as neither appear to be.)

[Gunnarrrrr]

Which is an old school "bbs forum" - this site nor AudiWorld? (TBH, kinda surprising as neither appear to be.)

well they function no better than one.

as for pictures on this site, gonna have to take that up with Mr. mod on paying for more storage to host pics here that are beyond potato quality (keep dreaming it’s not gonna happen)


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[SQ5onFIRE]

2021 sq5 stock rims stock all seasons on the 93 octane tune. 1100 da with 2 car seats in the back and stuff in my trunk.

[S4James]

I have my draggy runs posted for 93 octane with fuel pump on this link. This forum keeps saying error uploading photos. When it lets me I will post here as well but if anyone wants to take a peek.

https://www.audiworld.com/forums/q5-...build-3070901/

APR told me directly that the fuel pump does nothing for the 93 octane tune. Yet you mentioned that there was a difference. Can you explain a little further?

[SQ5onFIRE]

APR told me directly that the fuel pump does nothing for the 93 octane tune. Yet you mentioned that there was a difference. Can you explain a little further?

Honestly it was a butt dyno thing. It felt quicker to me. I have no actual data to back that up. I did not do draggy runs without the pump.

[SQ5onFIRE]

Switched over to e85 and did a dyno run. Very happy with the results being it was 80 degrees for the run. Also it shows it is right in line with Apr claims to the wheels on e85. Within 20 wheel from their dyno and my curve looks the same. Easily dyno to dyno variance and weather. Good work APR!

[S4James]

may i ask what percentage of ethanol you need to run? APR doesnt seem to have much posted on that.

[SQ5onFIRE]

may i ask what percentage of ethanol you need to run? APR doesnt seem to have much posted on that.

Any amount from e60 to e85 basically pump e85 should I say should, technically fall in that range. By me it always is. You shouldn’t have to mix anything pretty easy. Pump and go. Sometimes you can get less or more but it’s rare. That’s why a fuel it gauge helps really for piece of mind only.

[Arin@APR]

Nice gains!

[S4James]

Arin: Any comment on differences between the 93 octane files (pump vs no pump) ?

[SQ5onFIRE]

I commented above to your previous post.

[S4James]

i should have quoted arin...

[A4 Centaur]

I was comparing these results with the M3/ M4 forums 1/4 mile times as I have to say these numbers are quite impressive.