The Integrated Engineering Audi 4.0T V8 RS6 RS7 RSQ8 EA825 ECU Tune is a comprehensive performance upgrade that elevates the power and responsiveness of Audi’s twin-turbo V8 platform. With industry-leading mobile flashing technology, multi-fuel support, hybrid turbo capability, and dyno-verified power gains reaching beyond 900 HP, this tune delivers a supercar-level transformation while retaining everyday refinement and safety.
Price range: $2,100.00 through $3,470.00
The Integrated Engineering Audi 4.0T V8 EA825 ECU Tune is a high-performance engine calibration designed to drastically enhance the power delivery and driving dynamics of Audi’s twin-turbocharged 4.0-liter V8 found in the C8 RS6, RS7, S8, SQ7, SQ8, and RSQ8 platforms. This advanced software recalibration unlocks substantial horsepower and torque gains across a variety of fuel types while retaining everyday drivability and reliability through iE’s refined tuning strategies. The tune integrates with iE’s mobile-based flashing system for convenient installation and comprehensive control.
With the Stage 1 ECU calibration, the Audi 4.0T engine releases significantly more power throughout the RPM range. Power output varies based on fuel octane and blend:
| Fuel/Stage | Horsepower (HP) | Torque (ft-lbs) |
|---|---|---|
| Stock (advertised) | 591 HP | 590 lb-ft |
| Stage 1 – 91 AKI / 95 RON | ~668 HP | ~768 lb-ft |
| Stage 1 – 93 AKI / 98 RON | ~690 HP | ~780 lb-ft |
| Stage 1 – 104 AKI / 108 RON | ~800 HP | ~821 lb-ft |
| Stage 1 – E85 | ~800 HP | ~745 lb-ft |
| Stage 1 – E40 Blend | ~828 HP | ~862 lb-ft |
| Pure900 Hybrid Turbo (104 AKI) | ~903 HP | ~866 lb-ft |
These figures demonstrate a dramatic increase over stock output, enabling supercar-level performance from a fully bolt-in platform.
The iE performance ECU tune goes beyond simple boost increases to deliver a fully optimized engine management experience, including:
Advanced Boost Control Mapping – Precisely tuned boost delivery for stronger and smoother acceleration under all load conditions.
Ignition Cut & Torque Limits Adjustments – Expanded thresholds to maximize usable power without compromising drivability.
Multiple Octane Fuel Support – Includes pre-calibrated maps for 91 AKI, 93 AKI, 104 AKI race fuel, E40, and E85 blends.
Improved Throttle and Torque Response – Sharper throttle mapping improves responsiveness and reduces lag.
Adaptive Safety Features (AutoProtect) – Built-in safety strategies reduce output temporarily if unsafe parameters are detected, protecting the engine.
Integrated Engineering’s POWERlink mobile tuning system enables easy, wireless ECU flashing and management via a smartphone or tablet with Bluetooth connectivity. With POWERlink, owners can:
Flash new ECU maps from home without specialized shop tools.
Switch fuel maps instantly between octane grades and blends.
Access live engine data monitoring, diagnostics, and error code clearing.
Receive future updates and enhancements directly through the mobile interface.
This system streamlines the tuning process and empowers the owner with full control over the car’s engine software.
The product lineup includes:
Stage 1 Tune – Designed for stock or lightly modified vehicles delivering strong power gains on pump and race fuels.
Pure900 Hybrid Turbo Tune – Tailored for vehicles equipped with Pure900 hybrid turbochargers, unlocking supercar-class power with exceptional transient response and high-RPM thrust.
Both configurations support high-performance fuel strategies and allow the vehicle to extract maximum potential from ethanol blends and high-octane fuels.
Included fuel calibrations cater to a wide range of performance preferences and fuel availability:
Pump Gas (91/93 AKI) – Optimized mid-range torque and drivability.
Race Fuel (104 AKI) – Higher octane calibration for maximum power output.
E40/E85 Ethanol Blends – Calibrations that allow safe ethanol usage with substantial power increases.
Hybrid Turbo (Pure900) – Calibrated for upgraded turbochargers to achieve ≈903 HP while maintaining stability.
This ECU tune applies to the following vehicles equipped with the EA825 4.0TT V8 engine:
Audi C8 RS6 Avant
Audi C8 RS7 Sportback
Audi S8
Audi SQ7
Audi SQ8
Audi RSQ8
It supports stock hardware and can be paired with additional intake, intercooler, or turbo upgrades for further performance scaling.
