APR 2.5 TFSI EA855 EVO ECU Upgrade
Audi RS3 (Facelifted) (MKIII / Typ 8V), Audi TT RS (MKIII / Typ 8S)

£1,140.00
Part number: APRECU088

Due to the nature of this product it is not available to buy online. Please call us or visit our workshop if you wish to purchase.

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Fitting service available at our workshop in Alfreton, Derbyshire UK for all items listed on our website. Call or Email for a price

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Product Details

APR Stage 1 ECU Upgrade

The APR Stage 1 ECU Upgrade is the first step towards making more power! This simple upgrade requires no engine hardware modifications, and produces 459-542 HP with 451-506 FT-LBS of torque, depending on octane. Gains as high as 66-132 HP and 88-146 FT-LBS of torque are available throughout the power band. To get more power, the vehicle can be outfitted with an upgraded intake, intercooler, catback exhaust and other small modifications without requiring any new modification to the ECU. Upgrading the small factory intercooler is highly recommended on this platform.

APR Calibration Report
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.
- 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 with a US Spec 2018 RS3, 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, and the gear in which it's dynoed.
Stock As Reported by Audi 95 RON 394 HP 354 FT-LBS    
Stock As Measured by APR 98 RON 420 HP 372 FT-LBS    
APR Stage I 95 RON 459 HP 451 FT-LBS +66 HP +88 FT-LBS
APR Stage I 98 RON 476 HP 470 FT-LBS +86 HP +108 FT-LBS
APR Stage I 102 RON 491 HP 475 FT-LBS +98 HP +112 FT-LBS
APR Stage I 104 RON 516 HP 498 FT-LBS +106 HP +137 FT-LBS
APR Stage I 108 RON 524 HP 506 FT-LBS +113 HP +146 FT-LBS

APR EMCS Programs and Features

APR’s Enhanced Modular Chipping System, (EMCS), brings selectable programs and features to the factory ECU, without the need to purchase external hardware switching devices. EMCS has the ability to completely rewrite the entire operating map data within the ECU, giving each program mode a completely different set of calibration changes. On this platform, this is contrary to the industry norm of capping limits, using multipliers, only swapping portions of a base calibration, or relying on knock activity to lower output. APR’s EMCS features and programs modes are activated via the factory OEM cruise control buttons, and optionally through APR Mobile. The vehicle’s cruise control will function normally while driving.

Program Switching

Program switching allows the user to cycle through up to four different engine calibrations and operating modes all without the need for external hardware.

Stock Mode

By selecting stock mode, the ECU calibration is reset to the factory calibration.

Fault Code Erase

Fault code erase allows the user to erase and reset engine related trouble codes and ECU adaptation data without using a speciality tool.

Security Lockout

Security lockout prevents unauthorized individuals from using APR's EMCS functionality. When enabled, APR's EMCS features will appear completely invisible until a user specified 2 to 4-digit security code is entered.

APR Performance Modes

APR's octane-specific calibrations are available for various premium and race fuels around the world. Each performance mode is a completely new calibration, altered specifically for the characteristics of the fuel quality selected.

Anti-Theft

When activated, Anti-Theft prevents normal operation of the engine even if the factory key is used. The vehicle will be completely immobilized until a user specified 2 to 4-digit security code is entered.

APR Mobile

APR Mobile is a simple yet powerful tool designed to enhance the APR tuning experience.

APR Mobile installs on smart phones, tablets and other devices and provides a wireless connection to the vehicle’s engine control unit or ECU. Once connected, the device can be used to access APR’s EMCS program switching features, read and clear fault codes and data log the ECU at high data rates not found on other commercially available tools. The app can also be used to access APR’s latest news articles, locate dealers in APR’s network and review previously saved data logging sessions.

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