Product Description
***THIS MODIFICATION IS IN-HOUSE ONLY. ONCE ORDERED, WE WILL CONTACT YOU FOR YOUR APPOINTMENT***
APR is pleased to present the ultimate engine control unit (ECU) upgrade for the 2.5T EA855 EVO (Gen 2) engine!
APR’s ECU Upgrades are the best dollar-per-horsepower modification one can make to the 2.5T 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. The software loads to the factory ECU through the OBD-II port, resulting in a clean and headache-free install. Optional features, such as APR’s EMCS Program Switching and APR Mobile are available. Furthermore, for those looking for tuning with a limited powertrain warranty, APR Plus has you covered!
APR ECU Upgrade Stages
APR’s ECU Upgrades are available in multiple stages, supporting various octanes both with or without any hardware modifications. Specific software is available for use with a high flow Race DP exhaust system and drop-in turbocharger upgrades are coming soon. Each stage is fully compatible with an upgraded intake, intercooler, catback exhaust, or other minor bolt on modifications.
Each stage includes optimizations to the factory boost gauge making it react more quickly and corrections to the power and torque gauges to match the increased output. Furthermore, we’ve added left foot braking, removed the speed limiter, raised the rev-limiter and added a motorsport limiter, adjusted the factory exhaust crackle to protect the catalyst, optimized cold start, retuned the exhaust flap actuation for the best performance and sound in multiple modes, optimized high altitude mappings, retuned the throttle for better response, and completely optimized the driving experience for street and track use making for a much more enjoyable driving experience!
APR Plus ECU Upgrade with a Limited Powertrain Warranty
The APR Plus ECU Upgrade is the first step towards making more power, and it includes our limited powertrain warranty. This simple upgrade requies no engine hardware modifications, and produces 459 HP with 451 FT-LBS of torque. Gains as high as 66 HP and 88 FT-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 version). 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! To learn more about APR Plus, please visit the APR Plus website.
If you’re not interested in the APR Plus limited powertrain warranty, and want even more power, check out our other Stages.
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 Stage 1 is available for 91 AKI, 93 AKI, 100 AKI, 104 AKI and E85 fuel grades in North America, and 95 RON, 98 RON, 102 RON, 104 RON, 108 RON and E85 fuel grades 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. To ensure proper E85 content levels, APR recommends using an E85 content sensor. Before using Ethanol, educate yourself and follow our switching guide. For maximum safety, especially on vehicles that see road course use, or long autobahn top speed runs, APR recommends NGK heat range 9 (NGK-R7437-9) spark plugs gapped to 0.024″ ±0.002″ or 0.6mm ±0.05mm with a change interval of 10-15,000 mi or 16-24,000 km.
APR Stage 1+ ECU Upgrade
The APR Stage 1+ ECU Upgrade is the next step towards making more power! This upgrade is designed for use with the APR Inlet System and APR RS3 Intercooler System or APR TT RS Intercooler System and produces 493-569 HP with 454-520 FT-LBS of torque, depending on octane. Gains as high as 86-162 HP and 96-152 FT-LBS of torque are available throughout the power band. To get more power, the vehicle can be outfitted with an upgraded intake, catback exhaust and other small modifications without requiring any new modification to the ECU.
APR Stage 1+ is available for 91 AKI, 93 AKI, 100 AKI, 104 AKI and E85 fuel grades in North America, and 95 RON, 98 RON, 102 RON, 104 RON, 108 RON and E85 fuel grades 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. To ensure proper E85 content levels, APR recommends using an E85 content sensor. For maximum safety, especially on vehicles that see road course use, or long autobahn top speed runs, APR recommends NGK heat range 9 (NGK-R7437-9) spark plugs gapped to 0.024″ ±0.002″ or 0.6mm ±0.05mm with a change interval of 10-15,000 mi or 16-24,000 km.
| Stage | NAR Fuel | ROW Fuel | 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. | ||||||
| – Max increases are based on APR’s actual measured stock values and not those reported by VAG. | RON = ROW Fuel Grades | AKI = North American (RON+MON)/2 Fuel Grades. | ||||||
| – 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 | 91 AKI | 95 RON | 394 HP | 354 FT-LBS | ||
| Stock As Measured by APR | 93 AKI | 98 RON | 420 HP | 372 FT-LBS | ||
| APR Plus | 91 AKI | 95 RON | 459 HP | 451 FT-LBS | +66 HP | +88 FT-LBS |
| APR Stage I | 91 AKI | 95 RON | 459 HP | 451 FT-LBS | +66 HP | +88 FT-LBS |
| APR Stage I | 93 AKI | 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 | 100 AKI | 104 RON | 516 HP | 498 FT-LBS | +106 HP | +137 FT-LBS |
| APR Stage I | 104 AKI | 108 RON | 524 HP | 506 FT-LBS | +113 HP | +146 FT-LBS |
| APR Stage I | E85 | E85 | 542 HP | 500 FT-LBS | +132 HP | +134 FT-LBS |
| APR Stage I+ with Inlet and IC | 91 AKI | 95 RON | 493 HP | 454 FT-LBS | +86 HP | +96 FT-LBS |
| APR Stage I+ with Inlet and IC | 93 AKI | 98 RON | 513 HP | 480 FT-LBS | +104 HP | +116 FT-LBS |
| APR Stage I+ with Inlet and IC | – | 102 RON | 528 HP | 485 FT-LBS | +116 HP | +121 FT-LBS |
| APR Stage I+ with Inlet and IC | 100 AKI | 104 RON | 533 HP | 510 FT-LBS | +125 HP | +144 FT-LBS |
| APR Stage I+ with Inlet and IC | 104 AKI | 108 RON | 541 HP | 518 FT-LBS | +132 HP | +152 FT-LBS |
| APR Stage I+ with Inlet and IC | E85 | E85 | 569 HP | 520 FT-LBS | +162 HP | +152 FT-LBS |
APR World Class Calibration Expertise
Tuning 101:
The 2.5T engine uses a Bosch MED 17 ECU for engine management. Basically, it’s a computer that tells the engine how to operate. Tuning software, like the APR ECU Upgrade, tells the engine how to make more power. It does this by running more boost pressure, optimizing the cam shaft positions, adjusting the air/fuel ratio, advancing ignition timing, and more.
A Better Engine Management System:
The 2.5T’s ECU is incredible. Without the driver knowing otherwise, the ECU makes intelligent adjustments to the engine’s operations to keep it running smoothly. Unlike ECUs found in many other makes and models, when properly tuned, the ECU eliminates the need for custom tuning to maximize output, even when weather conditions change dramatically.
How APR Differs from the Competition:
The ECU is powerful, but extremely difficult to master. Without mastery, the ECU must be simplified, removing what makes it so desirable. The result is an incomplete product that often requires end user adjustment to maximize output in limited scenarios. On the contrary, APR’s Engineers spent the better part of a decade mastering the ECU to unlock its full potential. With complete access to the thousands of maps, tables and variables within, as well as a high-level understanding of how it works, APR’s Engineers were able to take advantage of everything the ECU has to offer. Power is maximized in nearly all scenarios, eliminating the need for end user adjustments. High performance operational modes are enabled and calibrated to deliver smooth daily driving, with a snappy and responsive throttle during moments of spirited driving. Mastery of the boost control system makes for an impressively predictable driving experience as the turbo spools quickly, delivering instant power, while torque-by-gear helps with traction control and protects the engine from being lugged out in tall gears. Lastly advanced high-output protection routines are enabled, allowing the ECU to make constant adjustments to airflow and fuel to cool and protect the engine, all without the driver knowing otherwise.
Extreme Testing
APR’s ECU Upgrade has been full tested for the better part of a year prior to a public release. This includes summer and winter weather testing on multiple continents, high and low altitude testing, extensive track testing at multiple road courses, extensive drag strip testing and extensive road and daily driving testing. APR’s test vehicles are full instrumented with multiple sensors, including pre and post intercooler temperature and pressure sensors, pre and post turbine temperature and backpressure sensors, pre and post catalyst temperature and pressure sensors, and multiple pressure sensors throughout the intake system. APR test vehicles have seen over 700 HP in various configurations, on the stock engine internals, and have set multiple world records, including 10.5 second stage 1 quarter mile passes, and 9 second stage 3 passes.
Beyond horsepower and torque enhancements, APR’s Calibration Engineers were able to increase the acceleration rate of the vehicle through other calibrations changes. Ignition delay is reduced resulting in a more responsive pedal without altering overall throttle sensitivity. Furthermore, throttle lag commonly noticed at slow speeds and while reapplying throttle has been reduced.
APR’s ECU upgrade increases the vehicle’s top speed limiter for blistering sprints around the track or across the Autobahn without the speed limiter shutting down the fun.
APR’s Left Foot Braking feature allows more control over the vehicle’s throttle. The factory equipped vehicle’s throttle input is disabled while pressing the accelerator and brake at the same time. Left Foot Braking, a common motorsport driving technique, allows the driver complete control over the vehicle’s throttle and braking system, which may give the vehicle the edge it needs at the track. This feature is available when traction control is in sport or disabled.
APR’s Motorsport Rev Limiter allows the engine to reach max RPM without the ECU slowing down acceleration nearly 150 RPM earlier. The result is more power to redline and a definable redline feeling as seen on other AudiSport vehicles.
APR’s Calibration Engineers paid close attention to several parameters directly related to fuel economy, especially while cruising at highway speeds. Depending on driving style and fuel quality, better miles per gallon may be achieved.
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.
To learn how to activate the programs and features, choose the vehicle’s cruise control type from APR EMCS Owner’s Manual.
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 specialty 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.
Reviews
There are no reviews yet.