Description

Overview

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!

Fits 2018-2023 Audi RS5

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
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
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

APR ECU Upgrade Stages

Each stage includes several adjustments and features to make the driving experience more enjoyable. We’ve not only made the engine more powerful, but we’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.

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 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.

APR Calibration Report

STAGE	HP	TQ	MAX GAIN	MAX 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 HP	537 FT-LBS	+75 HP	+98 FT-LBS
STAGE 1
91 AKI / 95 RON	488 HP	537 FT-LBS	+75 HP	+98 FT-LBS
93 AKI / 98 RON	498 HP	556 FT-LBS	+90 HP	+118 FT-LBS
100 AKI / 104 RON	524 HP	581 FT-LBS	+115 HP	+143 FT-LBS
104 AKI / 108 RON	532 HP	606 FT-LBS	+129 HP	+168 FT-LBS
E60-E85	550 HP	569 FT-LBS	+104 HP	+123 FT-LBS
STAGE 1+ W/ HPFP
E60-E85	561 HP	608 FT-LBS	+138 HP	+169 FT-LBS

The APR Difference

Who we are - We’re a global automotive engineering firm nestled in Opelika, Alabama. Our 80,000ft² 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 don’t take shortcuts, and we don’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, we’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!