APR - Audi B8 RS5 4.2L FSI ECU Upgrade

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Make Model Chassis (year) Engine
Audi RS5 B8 4.2L FSI
 Product Description

Want more power and performance from your 5.2L V8 FSI Audi RS5?  This ecu upgrade is just what your vehicle needs.

APR’s extensive research and development provides you with a powerful ECU upgrade with no loss of drivability or reliability.
Expect faster acceleration, improved throttle response and more power across the entire power band.

APR’s 4.2L FSI V8 ECU Upgrade is an expertly recalibrated engine control strategy that primarily remaps the engine’s air fuel ratio
and ignition timing, within the factory ECU, to provide smooth and reliable power as if intended by the OEM.  APR’s ECU Upgrade
is developed to work within the OEM and Tier 1 Supplier specifications for engine component stress tolerances and performance
specifications. Available in octane-specific variations, APR’s calibrations allow you to take advantage of fuel quality available in your
area. APR’s patented EMCS functionality puts the control of your engine’s operation at your fingertips and allows for additional
features and options to be installed to your OEM ECU.

Stage I Upgrade Details:

The APR Stage I ECU Upgrade gives you higher peak numbers of 458 HP/330 FT-LBS on 93 octane and up to 466 HP/335 FT-LBS
on 100 octane race fuel
. As much as 18 HP and 16 FT-LBS of torque are available through the power band. APR’s ECU Upgrade is the
best power per dollar modification for the new 4.2L FSI V8 and gives it just the extra edge these cars lack from the factory without pushing
the limits. With factory-like smoothness and drivability, APR’s ECU upgrade will fill the void in an otherwise excellent car.

Acceleration Enhancements:

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.

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!

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 your fun!

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.

Performance Figures:

Measured by Audi
Stock - 93 Octane
Measured by APR
91 Octane 93 Octane 100 Octane
Rev Limit 8400 RPM 8400 RPM 8400 RPM 8400 RPM 8400 RPM
Speed Limit Max Speed Limited Max Speed Limited Unlimited Unlimited Unlimited
Peak Horsepower (HP) 450 HP 450 HP Unmeasured 458 HP 466 HP
Peak Torque (FT-LBS) 317 TQ 324 TQ Unmeasured 330 TQ 335 TQ
Horsepower Increase over     Unmeasured 10 HP @ 3250 RPM 18 HP @ 7150 RPM
FT-LBS of Torque Increase     Unmeasured 16 TQ @ 3250 RPM 16 TQ @ 2350 RPM


APR EMCS Programs & Features:

EMCS is APR's revolutionary patented Enhanced Modular Chipping System. EMCS is an industry leading technology that brings many new
features to the automotive enthusiast. This technology was developed exclusively by Audi Performance & Racing, LLC and demonstrates 
APR's continued commitment to lead the industry with the most technologically advanced products available.

Want chipped mode? Want to be able to switch back to your stock settings? Want a race mode to run 100 octane fuel at the track? How about
a valet mode that limits power? EMCS is the lone technology on the market that can give you all of these options. No changing of the chip or
ECU is required. These programs are available at the touch of a button.

APR's EMCS features and program modes are activated via your OEM cruise control buttons for ease of use and stealth. Your cruise
control will continue to function as normal, but will give you the ability to scroll through the programs you have purchased with your APR ECU
Upgrade. The procedure is simple and involves only two steps.

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. The engine will run exactly as it did before
purchasing APR software.

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.

Valet Mode:  APR's Valet Mode protects your vehicle from becoming an expensive toy for unauthorized individuals. By enabling Valet Mode, the
vehicle's performance is extremely limited. Launch control is uneventful, the vehicles top speed is limited to roughly 40 MPH and the engine's
redline is reduced to nearly 5,000 RPM!

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.

Anti-Theft:  When activated, Anti-Theft prevents the engine from starting 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.

Special Note: This product is for installation in our Westlake, Ohio facility, please call HS Tuning to schedule an appointment.