IE Audi 4.0T V8 EA825 ECU Tune For C8 RS6, RS7, S8, SQ7, SQ8, & RSQ8
Unlock supercar-level performance from your Audi C8 4.0TT twin-turbo V8 with the IE Performance ECU Tune. This advanced calibration dramatically increases hidden horsepower and torque while retaining daily drivability — all flashed conveniently from your phone with the IE POWERlink Bluetooth tool.
Innovative Mobile Tuning
Tune your engine in minutes from the palm of your hand using the POWERlink app on Apple or Android devices. Monitor live data, switch octane files, perform diagnostics, and update maps without a workshop visit.
Stage 1 – Big Performance Gains
Stage 1 ECU calibration unleashes massive hidden performance with up to approximately 828HP and 862 ft-lbs torque, optimizing boost delivery, throttle response, and overall powerband for an exhilarating driving experience on stock or lightly upgraded hardware.
Pure900 Hybrid Turbo Support
For extreme power goals, the Pure900 Hybrid Turbo suite pushes performance even further — with up to 903HP possible when paired with appropriate hardware (intake, turbo inlet, intercoolers, Pure900 turbos, and iE 4-bar map sensors).
GO ALL OUT FOR UP TO 903HP
For the serious horsepower junky, iE's Hybrid Turbo Tuning Suite has been designed for use with the bolt-in Pure900 turbochargers. Unlock supercar-level power and torque with remarkable transient response, minimal turbo lag, and an exhilarating pull all the way to the redline. This new power curve completely transforms your C8 4.0TT with true supercar power levels while maintaining everyday comfort during your daily drives.
- Massive power with minimal boost lag increase
- Includes 91, 93, & 104 octanes
- Boost/power/torque gauges rescaled
- Optimized hybrid turbo launch control
- Requires intake upgrade
- Requires turbo inlet upgrade
- Requires intercooler upgrade
- Requires Pure900 turbochargers
- Requires iE 4 bar map sensors (x4)
Fuel Maps & Flexibility
- 91, 93, 104 AKI octane fuel files included
- E40 and E85 ethanol maps for enhanced power and torque
- E40 maximizes torque output safely on factory injectors
- Race fuel (104 octane) included for areas without ethanol availability
Flashing E85 gives a major power boost compared to conventional pump gas without the risk of lean conditions or misfires.
Additional Tune Enhancements
- Stage 1 transmission tune included
- Launch control optimized with more aggressive strategy
- Brake boost enabled for rolling launches
- Recalibrated boost and power gauges
- Enhanced exhaust overrun crackle in Sport mode
- Neutral & park rev limiter raised
- Road speed limiters removed
- Adaptive tuning for all climates and elevations
These features elevate both performance and the overall driving experience while retaining reliability.
ADDITIONAL TUNE FEATURES
Flashing the E85 fuel map allows easy fill-ups at the pump without mixing ethanol blends. This ethanol calibration delivers a massive increase in power over regular 91/93 pump gas while keeping mid-range power in check with the factory direct injection (DI) system and avoiding lean conditions, misfires, and power loss. E85 offers amazingly fast and consistent power delivery from the pump and is much less expensive than race gas.
Ethanol files are not available with Pure900 Turbo Tuning.
Ready to experience an absolute torque monster!? Mixing regular 91/93 pump gas and E85 at a 40% ethanol content (E40) creates a blend that stays within the safe limit of fuel delivery for the factory injectors. This allows the E40 calibration to produce the full torque output available from the twin-turbo V8, resulting in an insane 862ft-lbs of torque that translates to a pull with seat slamming g-forces.
An ethanol content sensor kit is highly recommended for blending E40.
In areas that do not have readily available ethanol or track enthusiasts with accessable race fuel pumps, the included 104-octane race gas file also succeeds in a considerable jump in power over regular pump gas. Sunoco GT260 Plus 104 octane is used to develop this tune and is highly recommended for the best results.
104 Octane option included with Stage 1 and Pure 900 Hybrid.
Commonly used in roll racing, Brake Boosting allows you to build extra boost by applying brake pressure while accelerating. Release the brake pressure for a "rolling launch" or extra surge of power.
Brake Boost is included on all tune stages.
Hardware Guide – IE 4.0TT ECU Tuning
IE 4.0TT tuning suites are designed to work seamlessly with optional or required hardware upgrades.
While Stage 1 does not require any hardware changes, adding intake, turbo inlet, and intercooler upgrades will improve airflow, reduce intake air temperatures, and enhance heat-soak recovery for additional performance.
Hardware Compatibility Table:
| Part Upgrade |
Stage 1 |
Pure900 |
| Air Intake |
Optional (recommended for most power)
|
Required |
| Turbo Inlet Pipes |
Optional |
Required |
| Intercoolers |
Optional (highly recommended)
|
Required |
| Cat-Back Exhaust |
Optional |
Optional |
| Hybrid Turbos |
Not Compatible |
Pure900 Required |
| 4-Bar MAP Sensors (x4) |
Not Compatible |
Required |
Power Gains
North American Region (NAR): AKI
Rest of World (ROW): RON
| Stage / Fuel |
Horsepower |
Torque |
| Stock Audi (Advertised) – RS6 / RS7 |
591 HP |
590 ft-lbs |
| Stock IE Dyno – RS6 / RS7 |
591 HP |
616 ft-lbs |
| Stage 1 – 91 AKI / 95 RON |
668 HP |
768 ft-lbs |
| Stage 1 – 93 AKI / 98 RON |
690 HP |
780 ft-lbs |
| Stage 1 – 104 AKI / 108 RON |
800 HP |
821 ft-lbs |
| Stage 1 – E85 |
800 HP |
745 ft-lbs |
| Stage 1 – E40 |
828 HP |
862 ft-lbs |
| Pure900 – 91 AKI / 95 RON |
771 HP |
795 ft-lbs |
| Pure900 – 93 AKI / 98 RON |
800 HP |
824 ft-lbs |
| Pure900 – 104 AKI / 108 RON |
903 HP |
866 ft-lbs |
Vehicle Fitment
| Make |
Model |
Year |
Generation |
| Audi |
RS6 |
2021–2023 |
C8 |
| Audi |
RS7 |
2021–2023 |
C8 |
| Audi |
S8 |
2021–2023 |
D5 |
| Audi |
SQ7 |
2021–2023 |
4M |
| Audi |
SQ8 |
2021–2023 |
4M |
| Audi |
RSQ8 |
2021–2023 |
4M |
Important Motorsport / Emissions Notice:
This product is designed for motorsport and off-road use only. It may not comply with emissions, noise, or road-use regulations in your region. Verify and comply with all local laws before installation and use.
SKU: IESOWC11
