4.0TT V8 EA825 ECU Tune | C8 RS6, RS7, D5 S8, & 4M SQ7, SQ8, RSQ8 | Integrated Engineering

Overview

Transform your Audi C8 4.0T Twin-Turbo V8 with an Integrated Engineering ECU Tune engineered for the RS6, RS7, S8, SQ7, SQ8, and RSQ8. Whether you're looking for a dramatic increase in performance on an otherwise stock vehicle or pushing beyond 900 horsepower with hybrid turbochargers, IE's calibrations deliver exceptional power while maintaining refined drivability, factory safety strategies, and reliable everyday operation.

Using the IE POWERlink mobile app, you can flash your ECU directly through the OBD-II port from your Apple or Android device. Switch fuel maps, upgrade tune stages, monitor live data, read and clear fault codes, and manage your calibration from the convenience of your smartphone.

Details

Features

• Flash directly from your Apple or Android device using the IE POWERlink app
• OBD-II Bluetooth flashing—no ECU removal required
• Up to 903 horsepower with Pure900 Hybrid Turbo calibration
• 91, 93, 104, E40, and E85 fuel calibrations available (application dependent)
• Supports both stock and upgraded hardware configurations
• Stage 1 TCU tune included
• More aggressive launch strategy with optimized launch control
• Brake Boost enabled for rolling launches
• Rescaled factory boost, horsepower, and torque displays
• Smoother virtual gauge animations
• Auto Start/Stop memory enabled
• Neutral/Park rev limiter increased
• Enhanced exhaust crackles in Sport mode
• Optimized throttle mapping and boost control
• Optimized EGT strategies for safe power production
• Reduced turbocharger lag
• Road speed limiter removed
• Adaptive tuning for all climates and elevations
• Built-in AutoProtect engine safety system

Stage Information

Stage 1

Stage 1 is designed for completely stock vehicles and delivers a substantial increase in horsepower, torque, throttle response, and acceleration without requiring hardware upgrades. Optional intake, turbo inlet, and intercooler upgrades further improve airflow, lower intake temperatures, and increase consistency during repeated pulls.

Pure900 Hybrid Turbo

For customers seeking maximum performance, the Pure900 Hybrid Turbo calibration transforms the EA825 into a true supercar-level powerplant with up to 903 horsepower. The calibration is optimized specifically for Pure900 turbochargers while maintaining responsive boost delivery and excellent street manners.

Required Hardware:

• Pure900 Hybrid Turbochargers
• Performance Air Intake
• Turbo Inlet Pipes
• Performance Intercoolers
• IE 4-Bar MAP Sensors (4x)

Existing Stage 1 customers can upgrade to the Pure900 calibration by paying only the software price difference.

Additional Tune Features

E85 Fuel

The optional E85 calibration unlocks significant horsepower and torque gains while automatically compensating for varying ethanol content. Ethanol's higher octane and cooling properties allow increased ignition timing and boost for maximum performance.

Note: E85 calibrations are not available with the Pure900 Hybrid Turbo tune.

E40 Blend

The E40 calibration delivers exceptional mid-range torque while remaining within the limits of the factory direct injection system. An ethanol content sensor is highly recommended to ensure proper fuel blending and consistent performance.

104 Octane Race Gas

For owners without convenient access to ethanol, the included 104-octane calibration delivers excellent performance gains using race fuel and is ideal for track events or maximum-performance applications.

Brake Boost

Brake Boost allows the engine to build boost while simultaneously applying the brake and accelerator, producing stronger rolling launches and significantly improved acceleration from a roll.

AutoProtect

Integrated Engineering's AutoProtect system continuously monitors critical engine operating conditions. If abnormal conditions are detected, the calibration automatically reduces engine output to help protect the powertrain before restoring full performance once normal operating conditions return.

Hardware Guide

Part Upgrade	Stage 1	Pure900
Air Intake	Optional (Recommended for Maximum Power)	Required
Turbo Inlet Pipes	Optional	Required
Performance Intercoolers	Optional (Highly Recommended)	Required
Catback Exhaust	Optional	Optional
Pure900 Hybrid Turbochargers	Not Compatible	Required
IE 4-Bar MAP Sensors (x4)	Not Compatible	Required

Notes

• IE POWERlink mobile app is required for flashing and software management.
• Stage 1 TCU software is included with compatible applications.
• E85 fuel maps are not available with the Pure900 Hybrid Turbo calibration.
• E40 calibrations are intended for properly blended ethanol fuel.
• Pure900 Hybrid Turbo upgrades require all listed supporting hardware.
• Existing customers can upgrade to the Pure900 tune by paying only the software price difference.

Fitment