Overview
Fits 2019-2023 Audi A8
Features:
- Delivers up to 384 HP with 499 FT-LBS depending on octane (APR Plus)
- Delivers up to 384-435 HP with 499-557 FT-LBS depending on octane (Stage 1)
- Max gains of +86 AWHP and +137 AWFT-LBS depending on octane (APR Plus)
- Max gains of +86-131 AWHP and +137-195 AWFT-LBS depending on octane (APR Stage 1)
- Supports 91 AKI, 93 AKI, 100 AKI, and 104 AKI fuel grades in North America and 95 RON, 98 RON, 104 RON, and 108 RON in the rest of the world
- Optional factory term limit matching limited powertrain warranty with APR Plus
- Standing RPM soft limiter increased
- Left-foot braking / brake boosting added
- Properly rescaled performance gauges
- Optimized launch control strategy for faster response and boost building
- Optimized driveline protection during launch
- Optimized thermal management and additional protection
- Optimized high-gear LSPI protection and turbocharger protection added
- Speed limiter removed
- Exhaust crackle added while retaining temperature safeties
- Auto start-stop defaults to the off position
- No hardware required (Software only)
- Supports standard bolt on modifications
- Eliminated the need for a TCU upgrade to achieve full torque
- Flash counter does not increase with each flash
- Free lifetime updates
- Direct OBDII port flash (No ECU removal)
- 30 day money back guarantee
APR ECU Upgrade Stages
Our new suite of MG1 ECU software comes after months of extensive research and development that is typically absent from the aftermarket. Our upgrade makes the engine more powerful and more exciting. We’ve extensively calibrated the system to work flawlessly on the track, while retaining safety routines to protect your engine in the most demanding scenarios. This was all made possible by our engineering team's pursuit of perfection. Development vehicles were outfitted with additional sensors, including turbo shaft speed sensors, thermocouples, transducers, and more, along with our high speed direct RAM logging equipment, to feed valuable data to the team for analysis. After thousands of hours of testing and tuning we created new calibrations that are fine tuned for several octanes and contain hundreds of map changes, with a vast array of safety features built in.
The result of this work is nothing short of astounding. Not only have we increase power, we’ve added many safety routines to ensure the engine and components are protected under demanding scenarios. Additionally we’ve added features to enhance the driving experience.
We’ve recalibrated the exhaust flaps to reduce backpressure and create consistent turbo spool characteristics. Sound characteristics are improved too, especially during free-rev, which sees its limiter raise in park and neutral. We’ve added a feature to enable exhaust crackle, which mimics much of the behavior of the RS models without being over-the-top and obnoxious. This enables during free-rev, downshifts, and lifting off the throttle. It’s optimized and includes safety routines to ensure component protection. Through proper torque management and ECU code changes, we’ve removed the requirement of a transmission tune to achieve full torque. We’ve optimized launch control for a better take-off and enabled boost building on the line. Additionally we’ve defaulted the start-stop feature to the off position, removed the speed limiter, added left-foot braking or brake-boosting, and configured the ECU to send the correct calibration to the dash for the performance gauges.
To protect the engine and components we’ve spent a considerable amount of time tuning safety routines, some of which were not active from the factory. The ECU will protect the engine should the exhaust flaps fail as back pressure becomes too high. The optional exhaust crackle feature will turn off should components get too hot. The engine has advanced LSPI protection to prevent the engine from damage when being lugged in the tallest gears. Excessive intake air temperature, which is common on a dynamometer, will cause power to reduce to protect the engine. Furthermore more we’ve added and calibrated protection routines for turbocharger pressure ratios, shaft speed, exhaust pressure, intake air temperature, coolant temperature, oil temperature, lambda, fueling system limitations, and more. All of this and more gives us confidence to offer an optional limited powertrain warranty through APR Plus!
APR Stage 1
The APR Stage I ECU Upgrade is the first step towards making more power! This simple upgrade requires no engine hardware modifications, and produces 384-435 HP with 499-557 FT-LBS of torque depending on fuel grade. Gains as high as +86-144 AWHP and +137-214 AWFT-LBS of torque are available throughout the power band, depending on fuel grade and factory output, making the vehicle exceptionally quicker in all scenarios. For even more power, this stage is compatible with normal bolt-on hardware modifications.
APR Stage 1 is available for 91 AKI, 93 AKI, 100 AKI, and 104 AKI in North America and 95 RON, 98 RON, 104 RON, and 108 RON in the rest of the world.
APR Plus
The APR Plus ECU Upgrade is the first step towards making more power, and it includes our limited powertrain warranty. This simple upgrade requires no engine hardware modifications, and produces 384 HP with 499 FT-LBS of torque. Gains as high as +86 AWHP and +137 AWFT-LBS of torque are available throughout the power band, making the vehicle exceptionally quicker in all scenarios.
The APR Plus ECU Upgrade matches the performance of our Stage 1 ECU Upgrade (91 octane). To get even more power, you can add any of our other Stage 1 compatible products and still be covered under the APR Plus warranty! If you're not interested in the APR Plus limited powertrain warranty, and want even more power, check out our other Stages.
APR Calibration Report
| STAGE | HP | TQ | MAX GAIN | MAX GAIN |
|---|---|---|---|---|
| Stock As Reported by Audi | 335 HP | 369 FT-LBS | ||
| Stock As Measured by APR | 349 HP | 373 FT-LBS | ||
| APR PLUS | ||||
| 91 AKI / 95 RON | 384 HP | 499 FT-LBS | +86 HP | +137 FT-LBS |
| STAGE 1 | ||||
| 91 AKI / 95 RON | 384 HP | 499 FT-LBS | +86 HP | +137 FT-LBS |
| 93 AKI / 98 RON | 401 HP | 517 FT-LBS | +97 HP | +155 FT-LBS |
| 100 AKI / 104 RON | 422 HP | 535 FT-LBS | +118 HP | +172 FT-LBS |
| 104 AKI / 108 RON | 435 HP | 557 FT-LBS | +131 HP | +195 FT-LBS |
Only use fuel equal to or higher than specified. Never use a lower octane fuel. Always follow our fuel guide, especially with race fuel and Ethanol, where available. Dynos are for reference only. Results will vary. Contributing factors include the vehicle condition, vehicle setup, dyno type, dyno setup, environmental factors, fuel quality, and more. When describing fuels, the North American Region (NAR) uses the Anti-Knock Index (AKI), (RON+MON)/2, or (R+M)/2. The Rest of the World (ROW) uses RON. RON is Research Octane Number and MON is Motor Octane Number.
The APR Difference
