APR 2.9T ECU UPGRADE AUDI RS4/5 B9
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APR is pleased to present the ultimate engine control unit (ECU) upgrade for the 2.9T EA839 engine!
APR’s ECU Upgrades are the best value modification one can make to the 2.9T engine. 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. Once the ECU is unlocked, the software loads to the factory ECU through the OBD-II port, resulting in a clean and headache-free install.
The APR Stage I ECU Upgrade is the first step towards making more power! This simple upgrade requires no engine hardware modifications, and produces 488-550 HP with 537-606 FT-LBS of torque depending on fuel grade. Gains as high as 75-129 HP and 89-168 FT-LBS of torque are available throughout the power band, depending on fuel grade and factory output, making the vehicle exceptionally quicker in all scenarios.
APR Stage 1 is available for 95 RON, 98 RON, 104 RON, 108 RON, and E85
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.
| Stage | Fuel grade | Max HP | Max TQ | Max HP Gain Over Stock | Max TQ Gain Over Stock | |
|---|---|---|---|---|---|---|
| - APR recommends and tuned with Sunoco GT 260 for 100 AKI mode and Sunoco GT 260 Plus for 104 AKI mode. Never use lower octane than specified by the mode. | ||||||
| - 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. To ensure proper E85 content levels, APR recommends using an E85 content sensor. Before using Ethanol, educate yourself and follow our switching guide. | ||||||
| - Max increases are based on APR's actual measured stock values and not those reported by VAG. | ||||||
- Reported wheel figures measured on APR's in house Dynamometer using SAEJ1349 correction and an average of multiple runs. Crank figures are estimated based on the measured wheel figures. Results may vary depending upon environmental conditions, vehicle, transmission, vehicle health, operating conditions, temperatures, fuel grade, dyno type, dyno setup, other variables and other modifications. On the dyno, this platform will see large swings in power based on intake air temperature, the gear in which it's dyno'd, and transmission temperature / oil viscosity. | ||||||
| Stock As Reported by Audi | 95 RON | 444 HP | 443 FT-LBS | |||
| Stock As Measured by APR | 98 RON | 458 HP | 469 FT-LBS | |||
| APR Stage I | 95 RON | 488 HP | 537 FT-LBS | +75 HP | +98 FT-LBS | |
| APR Stage I | 98 RON | 498 HP | 556 FT-LBS | +90 HP | +118 FT-LBS | |
| APR Stage I | 104 RON | 524 HP | 581 FT-LBS | +115 HP | +143 FT-LBS | |
| APR Stage I | 108 RON | 532 HP | 606 FT-LBS | +129 HP | +168 FT-LBS | |
| APR Stage I | E60-E85 | 550 HP | 569 FT-LBS | +104 HP | +123 FT-LBS | |