APR

APR ECU Upgrade - 2.9T EA839 V6 (B9) (RS4/RS5)

Fits 2018-2023 Audi RS5

Part # ECU-29T-EA839-B9 Be the first to write a review

APR ECU Upgrade - 2.9T EA839 V6 (B9) (RS4/RS5)

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APR's ECU Upgrades are the best dollar-per-horsepower modification one can make to improve engine performance. The upgrades dramatically increase horsepower and torque, making for an exceptionally quicker and more exciting vehicle. This is made possible through APR's optimization of the factory engine management system to take full advantage of the engine's capabilities, without needing any end user adjustment. The ECU Upgrades are available with various features and supported octane levels and each stage is compatible with most typical bolt-on modifications. The software is installed to the vehicle's factory ECU through the OBD-II port once the ECU is unlocked, resulting in a clean and headache-free install. Furthermore, for those looking for tuning with a limited powertrain warranty, APR Plus has you covered!

Features:

  • Horsepower - More horsepower throughout the whole rpm band
  • Torque - More torque throughout the whole rpm band
  • Warranty - APR Plus is available, providing a factory term limit matching limited powertrain warranty
  • Stages - Multiple performance levels depending on installed hardware
  • Fuel Grades - Multiple octanes from which to choose
  • Ethanol - Ethanol support from E60-E85 for maximum performance
  • Acceleration - Accelerate faster with more power and reduced throttle lag
  • Linear Throttle - Pedal maps adjusted for a more linear feel
  • Launch Control - Adds a new launch control strategy for better launches with more driveline protection
  • Brake Boosting - Left foot braking or brake boosting added
  • Rev Limiter - Increased redline for higher revving
  • Standing Limiter - Increased standing limiter for higher revving at idle
  • Speed Limiter - Go as fast as you want with the speed limiter out of the way
  • Auto Start/Stop Inversion - Auto Start/Stop defaults to the off position
  • Exhaust Flaps - Enhanced power delivery and drivability through recalibrated exhaust flap actuation
  • Added Safety - Additional safety features and protection modes added
  • Economy - While cruising, or driving normally, your fuel economy may benefit from our optimized calibration
  • Boost Gauge - The factory boost gauge displays accurate boost and reacts more quickly
  • Power and Torque Gauges - The factory power and torque gauges are accurately rescaled
  • Flash Counter - Flash counter does not increase with each flash
  • Direct Port Programming - Clean and easy install to the factory ECU without opening the case
  • Free Updates - Get free updates for life
  • Guarantee - 30 day money back guarantee
Brand APR
Engine AspirationTurbocharged
Engine ConfigurationV6
Engine Displacement2.9L
Engine FamilyEA839
Engine OrientationLongitudinal
Fuel TypeGasoline
MarketNAR
ROW
Product TypeECU Upgrade
Part NumberECU-29T-EA839-B9
Important fuel quality information
Important fuel quality information
Find your boxcode and revision
Find your boxcode and revision
ECU Order Form
Select VW/Audi MG1 under unlock type
APR Plus Warranty Booklet
APR Plus Warranty Booklet
Launch Control Tutorial
Launch Control Tutorial
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.

Have a question about this product?

  • Question

    are there like a E30 equivalent tune ?

    By Aquila Liu on May 5, 2023

    Answer
    No, E60-E85 is all we offer for Ethanol. Running E30 on a gasoline map may run into fuel trim issues.
    Helpful?
  • Question

    Can you run the stage 1 E60-E85 tune on stock fuel pump ?

    By Aquila Liu on May 5, 2023

    Answer
    Yes. HPFP and 1+ tune will simply make more power and torque.
    Helpful?
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APR ECU Upgrade Stages

Each stage includes several adjustments and features to make the driving experience more enjoyable. Weโ€™ve not only made the engine more powerful, but weโ€™ve improved acceleration, removed the speed limiter, enabled left-foot braking or brake boosting, properly rescaled the boost gauge, increased the stationary rev limiter, optimized thermal management and protection, designed the software to support normal bolt on modifications while not requiring any for the baseline configuration, and eliminated the need for a TCU upgrade to deliver maximum torque while still accurately reporting torque to the ECU.


Our ECU Upgrades are available in multiple configurations. Installation of additional performance hardware, such as an intercooler or intake systems, may provide further performance improvements.

APR Stage 1

The APR Stage 1 ECU Upgrade is the first step towards tuning your engine. It produces up to 488-550 HP and 537-606 FT-LBS of torque with gains as high as +75-129 HP and +89-168 FT-LBS of torque at the wheels.


APR Stage 1 is available for 91 AKI, 93 AKI, 100 AKI, 104 AKI, and E60-E85 fuel grades in North America, and 95 RON, 98 RON, 104 RON, 108 RON, and E60-E85 in the Rest of the World.


Please note, our E85 software is not a full flex fuel program. In this mode the engine is only designed to work on E85, as found directly at the pump, including both summer and winter blends from E60-E85. Using traditional pump fuels in this mode may result in engine damage. Do not manually blend with traditional pump fuel or race fuels or use race specific barrels of E85. To ensure proper E85 content levels, APR recommends using an E85 content sensor. Before using Ethanol, educate yourself and follow our switching guide.

APR Plus

APR Plus is our APR Stage 1 ECU Upgrade with our limited powertrain warranty and itโ€™s the first step towards tuning your engine. It produces up to 488 HP and 537 FT-LBS of torque with gains as high as +75 HP and +89 FT-LBS of torque at the wheels. Please check our warranty manual to understand modifications supported by APR Plus.

APR Stage 1 Plus

The APR Stage 1+ ECU Upgrade is the next step towards tuning your engine. It produces up to 561 HP and 608 FT-LBS of torque with gains as high as +138 HP and +169 FT-LBS of torque at the wheels, on E60-E85. Use this tune with an APR HPFP fueling upgrade.


APR Stage 1+ only makes more power on E60-E85 fuel over our stage 1 software. All other available octanes make the same power as Stage 1. APR Stage 1+ is available for 91 AKI, 93 AKI, 100 AKI, 104 AKI, and E60-E85 fuel grades in North America, and 95 RON, 98 RON, 104 RON, 108 RON, and E60-E85 in the Rest of the World.


Please note, our E85 software is not a full flex fuel program. In this mode the engine is only designed to work on E85, as found directly at the pump, including both summer and winter blends from E60-E85. Using traditional pump fuels in this mode may result in engine damage. Do not manually blend with traditional pump fuel or race fuels or use race specific barrels of E85. To ensure proper E85 content levels, APR recommends using an E85 content sensor. Before using Ethanol, educate yourself and follow our switching guide.

Horsepower and Torque Dyno Charts

Select a DynoSelect a Dyno Type

APR Calibration Report

StageHPTQMax GainMax Gain
Stock As Reported by Audi 444 HP 443 FT-LBS
Stock As Measured by APR 458 HP 469 FT-LBS
APR Plus
APR Plus (91 AKI)488 HP537 FT-LBS+75 HP+98 FT-LBS
Stage 1
91 AKI / 95 RON488 HP 537 FT-LBS +75 HP +98 FT-LBS
93 AKI / 98 RON498 HP 556 FT-LBS +90 HP +118 FT-LBS
100 AKI / 104 RON524 HP 581 FT-LBS +115 HP +143 FT-LBS
104 AKI / 108 RON532 HP 606 FT-LBS +129 HP +168 FT-LBS
E60-E85550 HP 569 FT-LBS +104 HP +123 FT-LBS
Stage 1+ w/ HPFP
E60-E85561 HP 608 FT-LBS +138 HP +169 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

Who we are - Weโ€™re a global automotive engineering firm nestled in Opelika, Alabama. Our 80,000ftยฒ state-of-the-art facility is home to some of the best engineers in the industry, who have mastered hundreds of engine management systems. We have multiple engine and chassis dynos, and the resources necessary to create our ECU Upgrades in-house, from the ground up! We're not a new company either. We've been around since the 90's and we have a strong financial backing to ensure we'll be here to support you for decades to come!


What we do - We optimize everything to make your engine more powerful. We adjust air-fuel ratios, advance ignition, increase boost pressure, alter cam positions and lift profiles, and more, all depending on the type of engine and management system, of course! We donโ€™t take shortcuts, and we donโ€™t take risks. We do it the right way.


How we differ - With our proprietary calibration and direct ram access data logging tools and operating system code changes, weโ€™re able to make some of the strongest and fastest ECU upgrades, without needing costly end user adjustments. We work with the ECUs intelligent modeling and closed-loop systems, and beta test in multiple environments to create upgrades that work no matter where you drive!

APR Software Pricing Guide

Our performance software upgrade is available in multiple stages with optional features.

APR Plus (USA/Canada)
APR Plus ECU Upgrade with a Limited Powertrain Warranty $1,799.95
APR Stage 1
APR Stage 1 ECU Upgrade$899.95
APR Stage 1 ECU Upgrade from APR PlusFree
APR Stage 1+
APR Stage 1+ ECU Upgrade$899.95
APR Stage 1+ ECU Upgrade from APR Plus or Stage 1Free

Purchasing, Guarantee, and Updates

Purchasing Optionsยน: Locate an APR Dealer. They will physically install software on your vehicle at their location. Alternatively with the APR Remote Tuning Service (RTS) you'll purchase an APR Tuning Cable and we, or a participating dealer, will remotely install software on your vehicleโ€ .


Money-Back Guarantee: Try our Software Upgrades for up to 30 days, risk free! If you are not satisfied, have it removed and refunded.ยฒ


Free Updates: If we make an update, add a standard feature, or if the manufacturer issues an update, you are entitled to a free update.ยณ


1. Availability: APR Software may not be available for all vehicles. Stages, programs, and features may not be available for all ECUs.
2. Money Back Guarantee: Excludes some Software Upgrades, such as those included with a hardware purchase. Labor charges are at the discretion of the installer.
3. Free updates: Subject to availability. Labor charges are at the discretion of the installer. Applicable to the original purchaser. Second hand owners may inquire with an APR Dealer about a software license transfer fee.
โ€ . Remote flashing: Excludes APR Plus. Excludes some platforms. Dealer participation will vary. Visit our product page for details.
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