APR 4.2L NA V8 ECU Upgarde (AUDI RS4 / RS5) | Performance parts and accessories for Audi, BMW, Volkswagen, Mini, Mercedes Benz, Porsche and Volvo

APR 4.2L NA V8 ECU Upgarde (AUDI RS4 / RS5)

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APR 4.2L NA V8 ECU Upgarde (AUDI RS4 / RS5)
APR 4.2L NA V8 ECU Upgarde (AUDI RS4 / RS5)
SKU:
DPP-4.2L-FSI-RS-SP
Availability:
Contact us for availability

Product Overview

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APR is pleased to present the ultimate engine control unit (ECU) upgrade for the 4.2 FSI V8. APR’s ECU upgrade is available in octane-specific variations and is conveniently flashed to the vehicle’s factory ECU through the OBD-II port without any physical modification to the factory ECU. APR’s EMCS functionality puts the control of the engine’s operation at your fingertips and allows for additional features and options to be installed to the OEM ECU.

The ECU’s MED 17 engine management system is responsible for proper operation of the engine during constantly changing environmental and load conditions. With built in compensational data for environmental variables and varying load conditions, the factory ECU is far more complex and intelligent than units found in other vehicle makes and marques.

APR's Calibration Engineers spent months calibrating the engine management system, including many hours of chassis dyno development. With a thorough understanding of the ECU’s torque structure, APR’s Calibration Engineers properly increased engine load to produce more power and torque across the entire power band. APR’s ECU Upgrade optimizes ignition timing, cam timing, lambda and more to produce higher output!

APR’s ECU Upgrades provides an excellent leap in horsepower and torque while retaining OEM knock control sensitivity and other built in safety features. This results in an exciting and powerful upgrade, optimized for various fuel grades found around the world.

he APR Stage I ECU Upgrade gives you higher peak numbers of 458 HP/330 FT-LBS on 93 (R+M)/2 octane and up to 466 HP/335 FT-LBS on 100 (R+M)/2 octane race fuel. As much as 18 HP and 16 FT-LBS of torque are available through the power band!

Acceleration Enhancements:
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.

Fuel Economy:
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.

Speed Limiter:
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.

Left Foot Braking / Brake Boosting:
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.

APR Stage I ECU Upgrade Calibration Report
 Stock
As Measured by Audi
Stock - 93 Octane (R+M)/2
As Measured by APR
93 Octane (R+M)/2
98 Octane RON
Rev Limit 8400 RPM 8400 RPM 8400 RPM
Speed Limit Max Speed Limited Max Speed Limited Unlimited
Peak Horsepower (HP) 450 HP 450 HP 458 HP
Peak Torque (FT-LBS) 317 TQ 324 TQ 330 TQ
Max Horsepower Increase over Stock     10 HP @ 3250 RPM
Max FT-LBS of Torque Increase over Stock     16 TQ @ 3250 RPM

Acceleration Testing

Program Mode0-60 MPH0-100 MPH60-120 MPH60-130 MPH1/4 Mile 60 FT1/4 Mile ET1/4 Mile Trap
Data collected at the same location via a Racelogic P-Box and at an IHRA Certified Drag Strip with 93 (R+M)/2 fuel, launch control, ESP/ASR off, Dynamic mode and Sport mode. May not be comparable to data collected in other locations.
Best Measured Stock - 93 (R+M)/2 Octane 4.3 sec 9.8 sec 9.1 sec 11.7 sec 1.777 sec 12.430 sec 110.37 MPH
Best Measured APR Stage I - 93 (R+M)/2 Octane 4.0 sec 9.1 sec 9.0 sec 11.3 sec 1.749 sec 12.278 sec 111.98 MPH

 

Application Guide
VehicleMarketEngineTransmission
Audi RS4 (B8.5) All 4.2L FSI V8 All
Audi RS5 (B8/B8.5) All 4.2L FSI V8 All

IMPORTANT AVAILABILITY DETAILS:- Program Switching: A fully loaded ECU includes up to 4 program modes (stock mode, performance modes, valet, etc), as well as fault code erase, security lockout and anti-theft depending on availability and ECU compatibility.- Availability and ECU Compatibility: Stages, programs, and features may not be available for all ECUs.- ECU Revision Notice: Multiple ECU revisions exist for each platform. APR software may be temporarily unavailable when factory updates are applied. An APR dealer can check availability in person, or over the phone if the ECU boxcode/revision is known.

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