The APR Stage 3 DTR8868 Turbocharger System is Here

[Arin@APR]

Product Page



The APR DTR8868 is a direct turbocharger replacement for the 3.0T EA839 engine found on the 2018+ Audi S4, S5, and SQ5! This upgrade includes matching software for various vehicles and mods, and provides up to 620 HP (571 AWHP) and 622 FT-LBS (572 AWTQ) of torque all while keeping emissions components unmodified. The software supports premium pump fuel grades, race fuel grades, and even ethanol all without any fueling upgrades. Additional HPFP software is available for max output on ethanol and increased protection headroom on pump fuel. Lastly, for dedicated race cars the turbocharger is designed with headroom to go even further on your own!

FEATURES AND BENEFITS

• New DTR8868 direct turbocharger replacement designed by APR
• Includes free ECU software upgrade from lower APR Stage
• Direct bolt-on upgrade to 3.0T EA839 engines
• Included software upgrade produces up to 620 HP (571 AWHP) and 622 FT-LBS (572 AWFT-LBS)
• Up to +263 AWHP and +255 AW-FTLBS of torque over stock
• Turbocharger provides headroom beyond advertised numbers
• Included software upgrade remains emissions compliant
• Included software upgrade designed for use on a factory engine
• Supports 91, 93, 100, 104 AKI, and E60-E85 in North America
• Support 95, 98, 104, 108 RON, and E60-E85 in the ROW
• German dual ceramic ball bearing center section
• Vibration sort rig (VSR) balanced turbocharger center housing rotating assembly (CHRA)
• Aircraft-grade billet 6061 aluminum 88/64mm compressor wheel
• .65 A/R compressor cover
• Integrated diverter valve (DV) port with OEM DV Included
• Nickle-based superalloy K418 high-flow 68/63mm turbine wheel
• High temperature 310 stainless steel turbine housing
• Internally gated wastegate with actuator
• .83 A/R turbine cover
• All necessary hardware, gaskets, and clamps included
• Connects to your factory components
• Optional HPFP upgrade provides increased output on ethanol, and more protection headroom
• Incredible value with support and directions included

This is a brand new turbo designed and developed by APR from the ground up. It does not require a core, and there's no additional downtime associated with other upgrade styles. The turbo bolts to the factory location and connects to factory or upgraded components.



Since this turbo was designed from the ground up, and doesn't use any of the factory or factory cloned housings or internals, we had complete control over the design. We've upgraded the CHRA to feature German dual ceramic ball-bearings for smooth and reliable operation with better transient response. This also does away with the journal bearing design on the factory turbochargers. Next the compressor cover was upgraded with an appropriate A/R matched to our larger billet aircraft-grade 6061 aluminum 88mm compressor wheel.



The turbine side of the turbocharger also benefits from our ground-up design. The turbine housing is cast with 310 stainless steel that's designed to take the heat an abuse seen on a road course. The turbine A/R is matched to our new nickel-based superalloy K418 54mm turbine wheel. The system will see low exhaust gas temperature, low exhaust back pressure, low turbo discharge temperature, and low shaft speeds because the system has been properly designed from the ground up for the prescribed power levels. Of course, each rotating group is VSR balanced for reliable operation. This all lends well for customers who plan to use this turbo on a dedicated race car as it has the headroom necessary to push the system further on their own.



Each kit includes the complete turbocharger including a calibrated wastegate actuator and diverter valve. All necessary one time use install hardware is included. The kit even includes an adapter for the APR intake system to provide maximum flow through the system, though the system remains compatible with the factory intake.



Our turbo loyalty program includes a free upgrade from any lower APR ECU stage to Stage 3. If you don't have APR software already, it's just the cost of the Stage 1 tune. Furthermore, there's no charge to upgrade from the stock HPFP software to the upgraded HPFP file, and there's no charge to jump between octanes, including ethanol.

APR Stage 3 software was designed with reliability in mind. It's designed to not spike the turbo hard in the lower RPM band or run on the edge of what the factory rods and pistons have been known to handle. Particular attention was paid toward component protections, for exhaust gas temperature (EGT), back pressure safety (EMAP), turbocharger discharge temperatures, and fueling system capabilities. This was done through accurately adjusting the factory modeling during the development phase. As the need for more fuel increases through rising exhaust gas temperature, the system will lower lambda to cool EGT, but will not excessively tax the injection system with excessive on-times. Secondary protections will limit output for safety. By using our HPFP software headroom is increased significantly, but does so without overdriving the pressure to the injection system. The need for limiting power under extreme prolonged use (Tracking the vehicle for example), is greatly reduced. Lastly, with the upgraded HPFP, output on ethanol is dramatically increased whereas on the stock HPFP Ethanol makes similar power to pump fuel.

Power and Torque



Stock as Reported by OEM
349 HP / 369 FT-LBS

Stock as Measured by APR
369 HP / 394 FT-LBS

STAGE 3 DTR8868

91 AKI / 95 RON
529 HP (479 AWHP) / 554 FT-LBS (503 AWFT-LBS)
+172 AWHP / +177 AWFT-LBS

93 AKI / 98 RON
548 HP (498 AWHP) / 561 FT-LBS (510 AWFT-LBS)
+191 AWHP / +186 AWFT-LBS

100 AKI / 104 RON
571 HP (521 AWHP) / 587 FT-LBS (537 AWFT-LBS)
+212 AWHP / +217 AWFT-LBS

104 AKI / 108 RON
596 HP (546 AWHP) / 599 FT-LBS (549 AWFT-LBS)
+243 AWHP / +230 AWFT-LBS

E60-E85 Ethanol
534 HP (483 AWHP) / 538 FT-LBS (489 AWFT-LBS)
+186 AWHP / +175 AWFT-LBS

E60-E85 Ethanol w/ HPFP
620 HP (571 AWHP) / 622 FT-LBS (572 AWFT-LBS)
+263 AWHP / +255 AWFT-LBS

NOTES:
Specific software is required to use this system. Software upgrade from lower stage is included for various vehicles. Software compatibility must be checked before purchase! The software installs to your vehicle's factory ECU. Currently software can only be installed by an Authorized APR dealer. Software is available in two formats: For use with the stock HPFP, and for use with the APR HPFP. The advertised results were captured with an APR Intake System, APR Intercooler System, and APR TCU Upgrade (for higher RPM). The max output on E85 was produced using an APR HPFP. INCLUDED SOFTWARE POLICY: This kit includes an upgrade to the APR Stage 3 ECU at no additional charge if the vehicle is already tuned with an APR ECU Upgrade. If the vehicle is not, an APR Stage 1 ECU Upgrade must be purchased to get the free upgrade to APR Stage 3 ECU Upgrade.

Guide:
2018+ S4, S5, SQ5

Links:
Turbo Kit Product Page
TCU Upgrade Product Page
Intake Product Page
Intercooler Product Page
HPFP Product Page
ECU Product Page

[A4 Centaur]

Arin, looking good! Priced competitively as well!

Will a purchase of APR Plus tuning and use with Stage 3 DTR8868 remain in effect?

[S4James]

Looks great. I can guess that IE should be able to whip up or use an existing adapter flange for their turbo inlet kit. Probably close to the pure750

Considering there is no core fee hassle. This is extremely competitive. Im in. Ill be talking to my local apr rep about a spring install.

[Arin@APR]

Arin, looking good! Priced competitively as well!

Will a purchase of APR Plus tuning and use with Stage 3 DTR8868 remain in effect?

You can upgrade from APR Plus to Stage 3 for free (no price for software).

Keep in mind, this does not fall under the APR Plus warranty.

[Jetta03]

I see the hpfp is optional and there are software variants that accomodate it. Are there any other must have hardware req's (vs recommended) for stage 3?

-intercooler?
-downpipe?
-intake?

Cheers

[MGZ]

You can upgrade from APR Plus to Stage 3 for free (no price for software).

Keep in mind, this does not fall under the APR Plus warranty.

Any info on RAL and ALC like 034 and IE will do

[Arin@APR]

Are there any other must have hardware req's (vs recommended) for stage 3?

If it was my car:

Intake - Stock will limit power a ton.

Intercooler - Stock will now lower IAT enough and will get hot quick and limit power.

HPFP - Stock is small. Even though it doesn't make more power (on pump) the protection routine will come in way later so you'll make more power longer. On E85, it makes more power, a ton.

TCU - The stock shift points are not fun with the turbo upgrade. We also increase the RPM. I wouldn't run without it.

[Arin@APR]

Any info on RAL and ALC like 034 and IE will do

I'm not aware of those terms.

[MGZ]

I'm not aware of those terms.

Rolling Anti Lag, Advanced Launch Control (ALC will allow you to target a specific load threshold, but that won't be rpm dependent. Once the specified torque amount is reached, the car will hold its rpm at that spot. Based on conditions, that RPM point can change)

[Arin@APR]

I don't have those features in our ECU/TCU. Sorry!

[A4 Centaur]

Arin, regardless I will strongly consider the APR Stage 3 DTR8868 because of my experience with the APR Brand. Certainly would rather be able to flash at home at that is a real plus for sure.

Will keep following as I have a 2023 S4 and would like to get to a little higher fun factor.

[Arin@APR]

Thank you!

[A4 Centaur]

You bet! Remember I was your High Altitude test mule for the Beta E888 2.0 a few years back!

[spacecase]

Great price, solid numbers. nice APR.

[HurrayFive]

These things are gonna sell like hotcakes at that price for 530-550HP on pump gas with only an intake and IC absolutely required, spool is a tad laggy but those are great numbers on mostly stock hardware. Nice work!

[brilliant_black]

Honestly a great option for those looking to get a bigger turbo, but not pushing the car too hard to blowing it up.

I honestly would have bought this if I still had my S4

As much as 700 torque seems fun, it’s just asking for trouble.


Sent from my iPhone using Tapatalk

[spacecase]

Honestly a great option for those looking to get a bigger turbo, but not pushing the car too hard to blowing it up.

I honestly would have bought this if I still had my S4

As much as 700 torque seems fun, it’s just asking for trouble.


Sent from my iPhone using Tapatalk

that's what Im thinking. APR takes their time to release which means they probably spent a lot of time really dialing this in. I know when they first released this on the MQB platform they quickly handled any issues that popped up and a lot of people were happy with the kit on a platform that has a lot of custom tuning and hybrid turbo options. I do remember the power numbers being lower than what was advertised on the MQB platform but hopefully this thing delivers as promised. Id like to think this is one of the safer stage 3 options available but time will tell.

[jaeger254]

How did you guys overcome the cylinder 6 issue? What exactly is causing the failures?
Stage 1 cars are blowing the cylinder, pushing it to stage 3 might be a little bit risky?

[Arin@APR]

We haven't seen that issue with our software and customers. The only thing I'm really aware of was the rocker arm issue, which is unrelated to tuning.

[Nillamb]

Do you have UK prices? Doesn't appear to be on the APR UK page.

[Arin@APR]

They may not have loaded it to their site. I don't know what the conversion rate would be. Give the guys over at https://www.awesomegti.com a call. They should be able to get you a price!

[Jetta03]

Where is this turbo manufactured?

[handspin]

first non down pipe setup past stage 1 nice, emissions should be non issue

[Beagz_b9_s4]

Let the fun begin!IMG_20230930_104957_01.jpg

Sent from my SM-S918U using Audizine Forum mobile app

[handspin]

wow that was fast, new relief valve too, wonder how it will sound, feel

aside from convenience flashing and reliability, less lag and linearity would be welcome. fast but not too furious ya?

gotta show EVs that light weight growler envy

[AldermanToffee]

wow that was fast, new relief valve too, wonder how it will sound, feel

aside from convenience flashing and reliability, less lag and linearity would be welcome. fast but not too furious ya?

gotta show EVs that light weight growler envy

Less lag?! Than the stock turbo?

[Arin@APR]

Let the fun begin!IMG_20230930_104957_01.jpg

Hell Yeah!

[DreamTFK]

Up to 2019 only - bummer.

[Arin@APR]

Some 2020 ECUs are covered. I can check. Support for the newer ECU type found in many 2020+ is being finalized now.

[handspin]

lol. i wish.. just vs the bigger turbo setups that have bigger inlets. weistec small twin scroll is 59 vs apr 63 vs 66+ tte/pure.. might even get away with a smaller ecs intercooler to minimize lag further w/o heatsoak

[seaburr]

Would APR recommend any other maintenance/PMs (example: PCV hose, coils) as part of this turbo install?

[Jetta03]

I was still curious, where is this turbocharger manufactured?

[asrautox]

I was still curious, where is this turbocharger manufactured?

Dude, take the hint. No response = China/Asia.


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[Tom/APR]

I was still curious, where is this turbocharger manufactured?

Right next to where just about every other BorgWarner, Garrett, and IHI turbo is made...

[Jetta03]

It was a completely honest question. But apparently the country of manufacture of this apr turbo is something apr doesn't want to talk about.

Just for future reference, the proper answer should have been....

-It's made in China
-Here's why we think that's a good thing
-And if you feel the need, here's some competitors that do the same.

Ignoring posts and being evasive really isn't the path to customer trust.

[S4James]

ive got no issue with this. I ran a pair of china turbos on my old S4 for years without incident.

[Arin@APR]

Bearing assembly, Germany. Castings, Asia.

[AldermanToffee]

Bearing assembly, Germany. Castings, Asia.

You answered!?! Now they can't be angry for absolutely no reason at all.

People are going to be in for a shock when they realise where most of the components for their Audis are manufactured, and it isn't Germany.

[handspin]

so no turbo upgrades are normally twin scroll right

https://web.mit.edu/sloan-auto-lab/i...bo_cutaway.jpg

otherwise the ports would be channelled

- - - Updated - - -

so no turbo upgrades are normally twin scroll right

https://web.mit.edu/sloan-auto-lab/i...bo_cutaway.jpg

otherwise the ports would be channelled

[oesman]

so no turbo upgrades are normally twin scroll right

https://web.mit.edu/sloan-auto-lab/i...bo_cutaway.jpg

otherwise the ports would be channelled

Not completely sure what you're asking, but the EA839 engine uses a twin-scroll turbo configuration. Both banks of cylinders exhaust into the turbo. Your example just has a different housing design, you would need to use a merge collector to join headers from both banks remotely. Our turbo is in a "hot-v" configuration and sits directly between the cylinder banks.

You can see the twin "scrolls" in the APR picture:

https://imgbox.com/fGtQayWP