Redline Speed Worx (RSW) is pleased to present APR's ultimate engine control unit (ECU) upgrade for the 4.0 TFSI V8.
Contact our Service Team to Schedule an Appointment Today!
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 RSW Service Team is happy to present a "How-To-Guide" to transforming a 4.0L V8 Twin Turbo Audi S8 into a monster in just 45 minutes. How can this be done, we are sure you are now asking yourself, with the aide of our Team it is rather simple.
Step One: giving our team a call to schedule your appointment.
Step Two: enjoy a drive down to our facility in your impressively powered stock Audi S8.
Step Three: Sit back and relax in our customer lounge & enjoy a cup of coffee.
Step Four: (45 minutes later) the complete APR ECU Upgrade process is complete!
Gains of up to 171+HP and 191 ft. lbs. of torque.
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.
Beyond power and torque enhancements, APR’s Calibration Engineers were able to increase the acceleration rate of the S8 through other calibrations changes. Ignition delay is reduced resulting in a more responsive pedal without altering overall throttle sensitivity. Furthermore, drivability was greatly improved by reducing the throttle lag commonly noticed at slow speeds and while reapplying throttle after decelerating.
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 your fun!
Increased 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 your driving style and fuel quality, you may see better miles per gallon!
Left Foot Braking:
APR's Left Foot Braking feature allows more control over the vehicle’s throttle. The factory equipped S8’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 S8 the edge it needs at the track. As is with all features APR adds to the ECU, this feature may be removed upon request.
The APR Stage I ECU Upgrade gives you higher peak numbers of 667 HP/697 FT-LBS on 93 octane and up to 692 HP/713 FT-LBS on 100 octane race fuel. As much as +171 HP and +191 FT-LBS of torque are available through the power band!
Dyno Graph - S8 Stage 1 ECU Upgrade: 93 Octane
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 increases boost pressure, optimizes ignition timing, cam timing, lambda and more to produce higher output!
Acceleration Testing - Stock vs APR Stage I 93 Octane & 100 Octane
Interested in the APR Stage 1 ECU Upgrade for your 4.0T equipped Audi S8? Contact our Service Team to Schedule an Appointment!