Audi Tuning | VW Tuning

APR DL501 S tronic TCU Upgrade for the 4.0 TFSI S6 and S7!

Posted on August 26, 2015 – 6:00 am

APR is pleased to present the ultimate transmission control unit (TCU) upgrade for the Audi S6 and S7 DL501 DSG and S-Tronic transmissions! APR’s TCU upgrade is conveniently flashed to the vehicle’s TCU through the OBD-II port with user definable options select-able at the time of install.

APR’s TCU upgrade goes beyond the overly simplistic norm of raising a few limiters, and offers a wide gamut of changes designed to enhance the driving experience especially when combined with APR’s performance engine software and hardware. With an in-depth knowledge of the transmission’s inner workings and control strategies, APR’s engineers have improved many aspects of the transmission from acceleration performance to daily drive-ability, while also incorporating new features including several that are typically reserved for higher-end Audi Quattro GmbH RS models.


  • Faster acceleration through application specific optimized shift points.
  • Drive and Sport mode shift maps custom tailored to APR’s power upgrades.
  • User adjustable 3-step multi-launch control RPM limits.
  • User definable* max launch control RPM.
  • User definable* manual mode downshifts via the kick-down switch (on/off).
  • User definable* manual mode upshifts at max engine speed (on/off).
  • Launch control response enhanced for quicker launches.
  • Launch control limits raised from 200 to 3,000 launches.
  • Manual mode / TT mode paddle response time optimized.
  • Manual mode / TT mode shift time optimized.
  • Torque intervention limits raised while retaining critical protection routines.
  • Temperature management optimized.
  • Transmission coolant pump optimized during high temp scenarios.
  • Gear display enabled in Drive and Sport.
  • Downshift “lockout” disabled below previous gear’s max RPM.

*APR’s DirectPort Programming suite allows the end user to tailor the TCU upgrade to their needs at the time of installation.

Drive (eco) and Sport Mode:

APR’s calibration experts found the factory drive and sport modes to be less than ideal when raising power above the factory limits. In drive mode, the transmission aggressively seeks sixth gear, earlier than necessary, leaving behind an anemic and lack luster experience for the driver. Likewise sport mode leaves a lot to be desired considering its seemingly exciting name. Under both modes, maximum shift points remain optimized for the factory power levels, which vary greatly to those produced using APR’s world-renowned catalog of performance hardware and software. As such, accelerative performance suffers due to non-optimized shift points.

To rectify this situation, APR’s engineers took a multi-step approach to custom tailoring the shift maps to sync harmoniously with APR’s performance upgrades and each platform’s gear-ratio configurations. While some may simply set wide-open-throttle, or WOT shift points to the vehicle’s max RPM limit, APR’s engineers chose shift points based on actual acceleration data. This result is gear dependent shift points typically below the engine’s max speed, but in doing so, the vehicle’s acceleration improves as axel torque is matched before and after shifts.

Under low-torque, low-rpm, part-throttle situations, both modes less aggressively seek the highest possible gear. Drive still has the benefit of economy, but stays within the power band more comfortably for a more enjoyable experience. Likewise sport mode has been optimized to provide a sporty feeling, worthy of its name. In both cases, the transmission seamlessly integrates with APR’s performance upgrades to provide an exciting driving experience.

Manual and Tiptronic Modes

APR’s user definable options allow the end user to configure how the transmission works while the gear selector is placed in manual mode.

The kick-down switch, which is responsible for an instant downshift, is enabled by default but can be disabled at the time of install. Likewise the auto upshift that occurs at the vehicle’s maximum engine speed can also be disabled at the time of install, allowing the engine to bounce off the limiter like a manual transmission. For safety’s stake, the auto first to second gearshift is still enabled.

The transmission does not lock out any manual downshifts so long as the shifting does not result in an engine RPM above the max shift point. In all situations, paddle delay is reduced, allowing for a more responsive shift to take place and furthermore, shift times have been optimized.

Shift Points

For use with the factory turbo:

     Gear       |  Drive   |   Sport   |   Manual  | Manual with Auto Upshift Off
First  to Second  Gear 6,275 RPM / 6,275 RPM / 6,550 RPM / 6,550 RPM
Second to Third   Gear 6,250 RPM / 6,250 RPM / 6,550 RPM / Never
Third  to Fourth  Gear 5,900 RPM / 5,900 RPM / 6,550 RPM / Never
Fourth to Fifth   Gear 5,425 RPM / 5,425 RPM / 6,550 RPM / Never
Fifth  to Sixth   Gear 5,375 RPM / 5,375 RPM / 6,550 RPM / Never
Sixth  to Seventh Gear 5,225 RPM / 6,550 RPM / 6,550 RPM / Never

Launch Control

APR’s 3-Step launch control is unlike anything else in the market. At the time of flashing, the user chooses a maximum launching RPM. When activating launch control, up to three launching RPM’s are available, allowing the end user to choose the best launching RPM based on the current conditions!

At 100% throttle with the kick-down switch engaged, the vehicle will select the highest launching RPM. At 100% throttle with the kick-down switch not engaged, a lower launching RPM is activated. Finally, at roughly 50% throttle the transmission chooses the lowest launching RPM. When properly dialed in, the user is left with incrementally higher launch points ideal for the street, track and sticky tires.

Utilization of launch control results in the transmission entering the maximum acceleration mode. During this mode, intervention between a shift is minimized, resulting in faster acceleration that keeps the driver planted to the back of his or her seat. The delay typically present after lifting the brake and beginning of the physical launch has been improved for a more immediate response.

Note: Both ASR and ESP must be fully off and the vehicle in Sport Mode to use Launch Control. This is accomplished by holding the traction control button for a length of time.

Adjustable Launch RPM Profiles

   Max    |   Mid     |   Min
6,000 RPM / 5,000 RPM / 4,000 RPM
5,500 RPM / 4,500 RPM / 3,500 RPM
5,000 RPM / 4,000 RPM / 3,000 RPM
4,500 RPM / 3,750 RPM / 3,000 RPM
4,000 RPM / 3,500 RPM / 3,000 RPM
3,500 RPM / 3,250 RPM / 3,000 RPM
3,000 RPM / 3,000 RPM / 3,000 RPM

Recommendation: When using launch control, excessive wheel spin will not improve acceleration and may cause undesirable behavior. APR suggests using lower launch limits under low grip situations. Maximum launch RPM is only ideal with drag slicks / radials on a well-prepped drag strip.

S Tronic Temperature Management

Temperature management is an important part of the DL501 transmission. While some may simply remove temperature protection routines all together, or mistakenly raise temperature protection torque limiters sky high and claim increased cooling performance due to zero transmission intervention, APR’s TCU upgrade only allows the maximum safe temperature levels before intervention. Under high stress scenarios, such as launch control, the transmission’s cooling pump runs at maximum speed until the desired transmission temperature is achieved.

Unlike the factory intervention routine, which allows for nearly no torque to be transmitted through the transmission at all after limits are crossed, APR’s over temp intervention allows for a limited amount of torque, enough so the vehicle can be safely driven off the track or pulled to the side of the road during intervention. In keeping the vehicle moving, airflow continues across the radiators, which in turn keeps coolant temps low and aids in removing heat from the factory DL501 oil coolers to restore full operation.

Torque Limits

Various factory torque intervention limiters are raised to their maximum value to eliminate unintended torque intervention, across the rev range, during normal and spirited driving. However, important and critical limiters are kept in place or only slightly modified, such as those related to temperature protection, to prevent premature damage to the transmission in dangerous scenarios.

Note: DL501 transmission software is not required to meet APR’s advertised torque figures.

Gear Display Indicator

In drive (eco) and sport mode, the vehicle’s multi function display will now indicate the currently selected gear rather than a generic D or S.

The APR Difference:

APR DirectPort Programming:

APR’s DirectPort Programming is now available for the Temic Tricore DL501 transmissions. Any APR Dealer in the world, connected to the Internet, has direct access to APR’s latest TCU upgrades for installation directly over the vehicle’s OBD-II port. This completely eliminates the need to remove and open the TCU and can be uninstalled at any time!

APR TCU Upgrade Creation:

APR’s engineers have taken a direct and custom approach to calibrating the TCU. All too often others create a generic calibration that is forced across a wide range of different vehicles and transmission versions. Unfortunately this generic method of copy and paste tuning can result in some undesirable effects, such as slow up shifts and downshifts, torque interventions, stumbling, immobility and general incompatibility. In some extreme cases, damage to the transmission can occur. With many factory TCU variations available for the transmission, APR’s engineers have painstakingly ensured every TCU upgrade is created using the transmission’s original file to ensure the ultimate experience!

APR TCU Composer:

APR’s proprietary TCU Composer is used for altering the transmission management system. With full access to every table, map and variable within every TCU, APR’s Calibration Engineers are not limited to the handful of pre-defined maps.

APR TCU Assembly:

APR’s Electrical Engineers have the ability to alter the code structure of the TCU. Through code-level changes, APR’s Engineers are able to add future features to the TCU otherwise impossible through calibration changes alone.

Application Guides

For best results, APR advises against mixing non-APR ECU and TCU Upgrades. APR cannot guarantee full compatibility with non-APR ECU Upgrades and as such offers a 30-day money back guarantee as outlined below.

Audi S6 & S7 (C7/C7.5 Platform)
4.0 TFSI Engine
7 Speed S Tronic Transmission



– Availability and TCU Compatibility: Some versions and features may not be available for all TCUs.
– TCU Revision Notice: Multiple TCU revisions exist for each platform. APR software may be temporarily unavailable when factory updates are applied. We can check availability in person, or over the phone if the TCU boxcode/revision is known.

Box Codes Available at Launch
More will be added to our servers as they are discovered

4G0927166F S0004
4G1927166L S0004
4G1927166L S0006
4G1927166L S0007
4G1927166L S0008
4G1927166L S0010
4G1927166S S0007
4G1927166S S0009
4G1927166S S0010
4G1927166S S0011
4G1927166S S0013
4G9927166B S0005
4G9927166B S0007
4G9927166C S0006

No appointment is necessary for this install. Stop by between 9am and 4pm, Monday through Friday. First come, first served!

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Hartmann Wheel Inventory Replenished!

Posted on August 11, 2015 – 2:10 pm

We’ve been receiving several containers to replenish our Hartmann Wheel inventory here at Achtuning!  Our sales team is reaching out to those of you who have backorders in place.  If you are anxious and want to finalize your order immediately, please do not hesitate to contact us!  Call 425-895-0000 or email

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APR Presents the Audi (C7.5) RS7 4.0 TFSI ECU Upgrade!

Posted on July 30, 2015 – 3:15 pm

Product Page

APR is pleased to present the ultimate engine control unit (ECU) upgrade for the Audi (C7.5) RS7 4.0 TFSI 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 increases boost pressure, 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

APR Stage I ECU Upgrade

The APR Stage I ECU Upgrade gives you higher peak numbers of 667 HP/626 FT-LBS on 93 (R+M)/2 octane and up to 691 HP/684 FT-LBS on 104 (R+M)/2 octane race fuel. As much as +127 HP and +185 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.

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 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:

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.

Power Output

APR EMCS Programs and Features

APR’s EMCS, Enhanced Modular Chipping System, brings selectable programs and features to your factory ECU, all without the need to purchase external hardware. Others have attempted to imitate EMCS with external switching devices that only replace or multiply portions of a “base” calibration. However, EMCS has the ability to completely rewrite the entire operating map data, giving each map a complete set of calibration changes. APR’s EMCS features and programs modes are activated via your OEM cruise control buttons. Your cruise control will continue to function as normal.

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 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.

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.


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.

APR Mobile

APR Mobile is a simple yet powerful tool designed to enhance the APR tuning experience.

APR Mobile installs on smart phones, tablets and other devices and provides a wireless connection to the vehicle’s engine control unit or ECU. Once connected, the device can be used to access APR’s EMCS program switching features, read and clear fault codes and data log the ECU at high data rates not found on other commercially available tools. The app can also be used to access APR’s latest news articles, locate dealers in APR’s network and review previously saved data logging sessions.

To learn more about APR Mobile, please visit our product page.

The APR Development Difference

APR DirectPort Programming:

APR’s DirectPort Programming is now available! Any APR Dealer in the world, connected to the Internet, has direct access to APR’s latest ECU upgrades for loading directly over the vehicle’s OBD-II port. This completely eliminates the need to remove and open the ECU for currently available files and can be uninstalled at any time!

APR ECU Explorer:

APR’s proprietary ECU Explorer gives APR’s Calibration Engineers unparalleled access to the vehicle’s entire engine management system. Typical commercially available data logging tools, used by most tuners, only allow logging up to 12 engine-operating variables at extremely low data rates. These tools are also limited to a small, specific list of variables. APR’s ECU Explorer is capable of logging every variable found within the ECU with far more variables logged at once, at very high data rates.

APR ECU Composer:

APR’s proprietary ECU Composer is used for altering the engine management system. With full access to every table, map and variable within the ECU, APR’s Calibration Engineers are not limited to a handful of maps as is common for most tuning companies.

APR ECU Assembly:

APR’s Electrical Engineers have the ability to alter the code structure of the ECU. Through code levels changes, APR’s Engineers are able to add features to the ECU. Other changes allow higher torque limits than those achievable through only modifying calibration data or using piggyback devices as is the case for many tuners. This allows APR’s engineers to often not require transmission software to meet or exceed advertised gains. On the highly modified end, this often allows APR to make turbo upgrades operate without the need for external manual controllers.

Application Guide

C7.5 Audi RS6 and RS7 4.0 TFSI


– Pricing: Please contact an APR Importer for pricing outside the USA.
– 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.

30 Day Money Back Guarantee:

All APR ECU Upgrades include a 30-day money back guarantee with no questions asked. If for any reason the owners is dissatisfied with the APR ECU Upgrade, they may return to the place of purchase for a full refund, provided they are within the 30 day period from the time of the initial purchase. Labor or shipping charges are not included in the guarantee and are at the discretion of the place of install.

Limited Lifetime Warranty:

All APR ECU Upgrades include a limited lifetime warranty against defects in the software, and to provide free updates and reflashes as they become available. Labor or shipping charges are not included in the warranty and are at the discretion of the place of install.

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Closed Friday, July 3rd

Posted on July 2, 2015 – 9:00 am

Please note we will be closed on Friday, July 3rd in observation of Independence Day and taking advantage of the long weekend. We will re-open on Monday, July 6th.

We wish you all a Happy and safe 4th of July weekend!

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2015 Port Townsend Cruise

Posted on June 5, 2015 – 9:01 am

Screen Shot 2014-03-21 at 7.25.27 PM

Join us this Saturday, June 6th for the annual Port Townsend Cruise benefiting Seattle Cancer Care Alliance! Details for the event can be found in the links below. We look forward to seeing you at Pacific Raceways at 9am!

Cruise information:

  1. Event Details
  2. About The Port Townsend Cruise
  3. Event Frequently Asked Questions
  4. Our Featured Charity: Seattle Cancer Alliance

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APR 2-Week Sale

Posted on May 11, 2015 – 9:00 am

From May 11th till May 25th, APR’s EMCS Program Switching as well as select APR Hardware and APR accessories are on sale and IN STOCK at Achtuning!

APR’s EMCS program switching, regularly up to $606 for a fully loaded ECU is now $149! Save $50 off the APR Runner Flap Delete and APR Shifter Cable Bracket, $200 off APR RS4 4.2L Downpipes, and finally discounted pricing on APR Badges and APR Steering Wheel Inserts.

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Audi (B8) A4 APR Software Update!

Posted on February 27, 2015 – 9:00 am

With over half a decade of development poured into this platform, APR’s Engineers are pleased to deliver several free upgrades to our existing customers. APR Stage I, Stage II and their K04 Turbocharger ECU upgrades are now revised with APR’s new calibration strategies designed to produce a fantastic driving experience with more power and torque on tap!

APR’s calibration experts spent months working with the various ECU, hardware and octane configurations to deliver a driving experience second to none. Major improvements were made to the way the throttle behaves, leaving the driver to feel more connected to the vehicle than ever before. With control and response maximized, APR’s engineers set out to increase power while keeping factory comforts in mind during part throttle driving. Engine load, valve lift, cam phasing and boost levels were all optimized to ensure the engine was breathing as freely as possible for maximum output. Ignition, lambda and other aspects of the direct injection fueling system were tweaked to raise and refine power further. The end result is a fantastic leap in performance and response that wakes up the engine sooner in the RPM band and carries horsepower and torque further towards redline.

Please visit each product page for full details, including our performance charts at the wheels, crank and the gain over stock using 91, 93 and 100 octanes!

New Figures:

Stage I ECU Upgrade | Product Page:

  • 301 FT-LBS / 256 HP – max gain of + 53 FT-LBS / + 55 HP over stock on 91.
  • 322 FT-LBS / 266 HP – max gain of + 74 FT-LBS / + 66 HP over stock on 93.
  • 323 FT-LBS / 282 HP – max gain of + 74 FT-LBS / + 76 HP over Stock on 100.

Stage I v1.3 vs v2.0, at all four wheels

Stage II ECU Upgrade | Product Page:

  • 341 FT-LBS / 287 HP – max gain of + 92 FT-LBS / + 97 HP over stock on 91.
  • 354 FT-LBS / 291 HP – max gain of +105 FT-LBS / +101 HP over stock on 93.
  • 359 FT-LBS / 304 HP – max gain of +109 FT-LBS / +111 HP over stock on 100.

Stage II v1.3 vs v2.0, at all four wheels

K04 Turbo Upgrade | Product Page:

  • 321 FT-LBS / 339 HP – max gain of +121 FT-LBS / +149 HP over stock on 91.
  • 342 FT-LBS / 348 HP – max gain of +130 FT-LBS / +158 HP over stock on 93.
  • 387 FT-LBS / 363 HP – max gain of +145 FT-LBS / +171 HP over stock on 100.

K04 Turbocharger v2.0 vs v3.0, at all four wheels

APR’s Stage 1 and Stage 2 ECU Upgrades are now version 2.0 while the K04 upgrade is version 3.0. No appointment necessary, just roll through between 9am and 4pm, Monday through Friday!

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Something Bavarian Has Begun

Posted on January 7, 2015 – 12:44 pm

Achtuning is excited to announce AWE Tuning’s entry into the BMW market!

AWE Tuning will officially launch their BMW performance exhaust line-up in January, and over the coming months they will be releasing many new performance upgrades for current model BMW models. Stay tuned!!

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Happy New Year!

Posted on January 1, 2015 – 12:00 am

Achtuning will be closed on New Years Day, January 1st.  We wish everyone a safe and Happy New Year and look forward to doing business with you in 2015!

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Happy Holidays from Achtuning!

Posted on December 24, 2014 – 5:00 pm

From all of us here at Achtuning, we wish you and yours a very Happy Holiday Season! Achtuning will be closed on Thursday and Friday (December 25th/26th)  and will return the following Monday, December 29th.  Have a Merry Christmas!!

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Audi Tuning | Audi Wheels

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Achtuning and its affiliates are not affiliated with any automobile manufacturer. OEM names and/or part numbers are used only to aid in identifying replacement parts; we do not imply that Achtuning products are affiliated with, sponsored, or approved by the Original Equipment Manufacturer.