Audi Tuning | VW Tuning

APR Valve Spring System

Posted on July 15, 2014 – 9:00 am



The APR Valve Spring System is a high performance, light-weight upgrade designed to increase valve control and eradicate valve float common on many applications.  APR’s design specifications called for a valve spring, retainer and spring seat combination that doesn’t overpower and snap the OEM valves or erode the aluminum spring seat, while still maintaining exceptional valve control.  The result is an advanced design that’s 28% lighter yet 20% stiffer than the high performance OEM Golf R setup and is proven to eliminate the OEM valve train’s weakest link.  APR calls it Performance Without Compromise!

Key Points:

  • Increase valve train control
  • 71% weight reduction over OEM Golf R retainers
  • 19% weight reduction over OEM Golf R springs
  • 20% stiffness increase over OEM Golf R springs
  • Eradicates TSI K04 “valve float” issues
  • Supports higher revving applications
  • Weight saving beehive spring design
  • ASTM A877A OTSC round wire steel springs
  • 6AL4V American titanium retainers
  • 4140 heat-treated chrome molly steel spring seats with black oxide coating
  • 29 grams per spring
  • 2 grams per retainer
  • Compatible with OEM valves
  • Spring seats included to protects against aluminum erosion in the head





Valve Springs



Weight reduction, and not necessary stiffness, is absolutely necessary to increasing valve control.  The APR Valve Spring utilizes a beehive design that allows for a reduction in mass in not only the spring itself, but also through use of a smaller titanium retainer.  The springs feature an ovate wire design that allows for even stress distribution resulting in better control at high RPMs through a resistance of harmful valve float inducing harmonics.  The lightweight design also accomplishes accurate valve control without requiring an overly stiff spring which has been proven to snap OEM valves in half.  Each valve spring weights 29 grams and represents a 19% weight reduction over the OEM Golf R spring.  The result is a highly engineered design that’s simply plug and play!

Valve Spring Retainers



Through the use of a beehive design, APR’s Engineers were able to design and supply a valve spring retainer that’s smaller than stock to reduce weight as much as possible.  In an effort to offer extreme weight savings, at an additional 71% over the OEM Golf R retainers, American 6AL4V titanium was used for its high specific strength weighing in at only 2 grams each.  By offering outstanding weight savings, exceptional valve control characteristic are achieved while only requiring a modest 20% increase in stiffness over the OEM Golf R spring.

Valve Spring Seats



Often an overlooked piece of an upgraded valve train is the valve spring seat.  The factory heads are aluminum, and unfortunately increased spring pressure can distort or erode the mating surface overtime as they mate directly to the bare head.  To prevent this from happening, APR’s Engineers designed valve spring seats out of 4140 heat-treated chrome molly steel with a black oxide coating.  The spring seats are strong enough to withstand pressure from the springs and provide a mating surface that evenly distributes spring load across a larger area than the spring it self, allowing an increased spring rate without negative side effects to the aluminum head.

Eliminating Valve Float

It’s not uncommon to experience valve float with the OEM valve springs, even below the OEM rev limit.  On some applications like the 2.0 TSI, back pressure from the K04 turbocharger has been known to force the exhaust valves open. This has been noticed on vehicles with overly weak OEM valve springs and some with higher miles that have simply lost their stiffness over time.

This issue accompanies misfires commonly above 5000 RPM.  In some extreme cases, valves are forced open and the vehicle ceases accelerating any further.  A quick datalog of intake mass airflow and boost pressure at wide open throttle will show a sudden rise in boost pressure with an immediate loss of airflow as pressure from the open valves is pushed back into the intake manifold.

On other applications, valve float can begin to occur just beyond the OEM rev limit.  While other components, such as higher strength valves are often required for extremely high revving applications, the APR Valve Spring System will eliminate float well beyond the revving constraints set forth by the other components.


Application Guide


APR Valve Springs, Valve Seats and Valve Retainers
Set of 16 Intake / Exhaust
1.8T & 2.0T (EA113 & EA888 G1/2)
MS100085
$599.99

APR Valve Springs, Valve Seats and Valve Retainers
Set of 20 Intake / Exhaust
2.5 TFSI & 2.5L I5
MS100089
$749.99

APR Valve Springs, Valve Seats and Valve Retainers
Set of 24 Intake / Exhaust
3.0 TFSI & 3.2L FSI V6
MS100090
$899.99

APR Valve Springs, Valve Seats and Valve Retainers
Set of 32 Intake / Exhaust
4.0 TFSI & 4.2L FSI V8
MS100091
$1,199.99

APR Valve Springs, Valve Seats and Valve Retainers
Set of 40 Intake / Exhaust
5.0 TFSI & 5.2L FSI V10
MS100092
$1,499.99


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Audi SQ5 Owners! It’s your turn!!

Posted on July 10, 2014 – 9:00 am

Achtuning is pleased to present the ultimate engine control unit (ECU) upgrade for the Audi SQ5 3.0 TFSI V6.  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.

The Continental SIMOS 8.5 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 in-house 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 from idle to red-line.  APR’s ECU Upgrade increases supercharger boost pressure and optimizes cam timing, ignition timing, lambda and more to produce higher output. Using APR’s proprietary high-speed data logging suite, the calibration team closely monitored the effects of these changes to ensure a powerful ECU upgrade without derogating the engine’s drivability or reliability.  APR’s ECU Upgrade will provide an excellent leap in power and torque while retaining OEM knock control sensitivity and other built in safety features.  The result is safely achieved power, optimized for various fuel grades found around the world.  We call it Performance Without Compromise!

APR Stage I ECU Upgrade



The APR Stage I ECU Upgrade is designed to work without requiring other changes to the vehicle’s hardware.  With the ECU Upgrade alone, APR’s Calibration Experts measured higher peak figures of 403 horsepower and 371 ft-lbs of torque with 93 AKI octane fuel. Large gains were seen throughout the power band, including an additional 50 horsepower and 43 ft-lbs of torque.  Even higher figures were achieved using 100 AKI octane race fuel.  The increase in power directly translates to an exceptionally quicker vehicle.

For those demanding more torque and power, the APR Supercharger Pulley Upgrade is the answer.  Spinning the supercharger faster increases air flow allowing for higher boost levels and more power.  The gain in torque is felt immediately, but the results are present across the entire power-band. Expect 419 horsepower 93 AKI octane fuel and 445 horsepower on 100 AKI octane race fuel!  Software is included as a free upgrade for APR Stage I customers with the purchase of an APR Supercharger Pulley Upgrade.

APR’s ECU upgrade is the best power per dollar modification for the new 3.0 TFSI engine and takes the vehicle’s performance to similar levels typically reserved for higher output, sporty models, without pushing the limits. With factory-like smoothness and drivability, APR’s ECU upgrade will fill the void in an otherwise excellent vehicle.


Acceleration Enhancements:

Beyond power 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, 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 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. As is with all features APR adds to the ECU, this feature may be removed upon request.

Dyno Performance





For more dyno graphs, click here:

Estimated Crank Figures | All Wheel Figures | Gain Over Stock | —- APR Stage 1 – 91 Octane
Estimated Crank Figures | All Wheel Figures | Gain Over Stock | —- APR Stage 1 – 93 Octane
Estimated Crank Figures | All Wheel Figures | Gain Over Stock | —- APR Stage 1 – 100 Octane


Estimated Crank Figures | All Wheel Figures | Gain Over Stock | —- APR Stage 2+ – 91 Octane
Estimated Crank Figures | All Wheel Figures | Gain Over Stock | —- APR Stage 2+ – 93 Octane
Estimated Crank Figures | All Wheel Figures | Gain Over Stock | —- APR Stage 2+ – 100 Octane

APR ECU Upgrade Calibration Report

352 HP & 347 FT-LBS of Torque – Stock as measured and estimated at the crank by APR with 93 octane

388 HP & 363 FT-LBS of Torque with +35 HP @ 6100 RPM & +30 FT-LBS of Torque @ 6100 RPM – APR Stage 1 with 91 Octane
403 HP & 371 FT-LBS of Torque with +50 HP @ 6100 RPM & +43 FT-LBS of Torque @ 6100 RPM – APR Stage 1 with 93 Octane
409 HP & 382 FT-LBS of Torque with +57 HP @ 6100 RPM & +49 FT-LBS of Torque @ 6100 RPM – APR Stage 1 with 100 Octane

404 HP & 389 FT-LBS of Torque with +52 HP @ 6100 RPM & +59 FT-LBS of Torque @ 2350 RPM – APR Stage 2+ with 91 Octane
419 HP & 397 FT-LBS of Torque with +67 HP @ 6100 RPM & +62 FT-LBS of Torque @ 2650 RPM – APR Stage 2+ with 93 Octane
445 HP & 403 FT-LBS of Torque with +92 HP @ 6100 RPM & +79 FT-LBS of Torque @ 6100 RPM – APR Stage 2+ with 100 Octane

- Max increases are based on APR’s actual measured stock values and not those reported by Audi. | RON = ROW Fuel Grades | AKI = North American (RON+MON)/2 Fuel Grades.
- Reported wheel figures measured on APR’s in house Dynapack Dynamometer with a 2014 SQ5 8-Speed Tiptronic, using SAEJ1349 correction and an average of multiple runs. Crank figures estimated based on the measured wheel figures. Results will vary depending upon environmental conditions, vehicle, transmission, vehicle health, operating conditions, temperatures, fuel grade, dyno type, dyno setup, and other modifications.



The APR Development Difference

APR DirectPort Programming:

APR’s patented DirectPort Programming is now available for the Simos 8.5 ECU!  With a simple connection to the Internet we have 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.  It’s capable of logging well over 100 variables at once with data rates as high as 100 samples per second.  Synchronous data logging is available for fine-tuning.

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.  ECU Composer takes calibration to a new level with APR’s Quick Flashing.  APR’s Calibration Engineers can reflash the ECU in seconds rather than waiting lengthy periods of time between each flash.

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 allows APR to make turbo upgrades operate as if intended by the OEM.

Pricing

Audi SQ5 3.0 TFSI – $1,299.00 Retails, $1,169.00 Sale till August 3rd

- Pricing applicable to the USA only. If outside of the USA, please contact an APR Dealer and Importer for pricing.
- Please note, VAG issues many ECU part numbers and revisions throughout their vehicle lineup. As such, some ECU part numbers may be temporarily unavailable when new parts or revisions are released. If the vehicle’s ECU box code and revision is known, availability can be checked by calling APR, or visiting an APR dealer. Typical turnaround time for new ECU box code and revision is quick. Please contact APR for details.


Security, Warranty and Money Back Guarantee

All APR ECU Upgrades are fully encrypted to prevent theft of our valuable and proprietary coding information by lesser companies.

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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APR Summer Sale

Posted on June 30, 2014 – 9:00 am


Achtuning is pleased to present the most anticipated sale of the Summer!   It’s time to begin enjoying the sun from the driver’s seat.  We would like to donate to the cause by offering outstanding savings and incentives on nearly the entire APR product line available and IN STOCK right here at Achtuning!!   


Sale Pricing on ECU Upgrades!



A fully loaded ECU typically includes your choice of 4 of the following programs:

  • Stock Mode
  • APR Diesel Performance Mode (Diesel Models Only)
  • APR 91 Octane Performance Mode (Gasoline Models Only)
  • APR 93 Octane Performance Mode (Gasoline Models Only)
  • APR 100 Octane Performance Mode (Gasoline Models Only)
  • APR Valet Mode



Also included are the following features:

  • Fault Code Erase – Clears Fault Codes

Some exceptions apply depending on ECU type. Please visit our individual product pages for more details!

APR DSG Software Sale:

  • APR DQ250 DSG software is $100 off the retail price!


APR Hardware Sale:

APR’s hardware is also on sale offering between 10-15% off of most hardware items in APR’s catalog.

  • APR Intake Systems are 10% off
  • APR Exhaust Systems are 10% off
  • APR Stage III, III+, K04 Turbocharger Systems are 10% off
  • APR Intercooler and Coolant Systems are 10% off
  • APR Motorsport and Other Hardware is 10% to 15% off



Some exceptions may apply.  Please visit our individual product pages for pricing details.

For up to date news, follow us on facebook!



Thank you and Go APR!


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Audi (B6/B7) A4: FREE Vogtland “GT1″ Upgrade!

Posted on June 20, 2014 – 1:00 pm

Buy a “standard” Vogtland coilover kit and we’ll upgrade you into the Vogtland GT1 coilover kit with the higher rear spring rate, giving you better over-all handling and cornering and eliminate most of that factory under-steer on your Audi (B6/B7) A4! Just enter coupon code “FREEGT12014″ when you check out. You can also call to place your order: 425-895-0000.


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Buy an APR 2.0T FSI K04 Turbo Kit, We’ll Install It For FREE!

Posted on June 19, 2014 – 9:00 am

Achtuning is offering FREE INSTALLATION of IN-STOCK APR 2.0T FSI K04 turbo kits with purchase!! Give us a call (425-895-0000) to make arrangements for install!

Turbo kits offered with free install are available for the following applications:
* VW (Mk5) GTI/Jetta/GLI/JSW 2.0T FSI
* VW Passat (B6) 2.0T FSI
* VW Eos 2.0T FSI
* Audi A3 2.0T FSI
* Audi TT 2.0T FSI

* Offer good while supplies last and cannot be combined with any other sale or promotion. Free install applies for purchase of APR turbo kits at full price.


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NOW HIRING!! (Technician)

Posted on June 18, 2014 – 1:00 pm

ACHTUNING is currently looking for a performance oriented, enthusiastic Audi and/or Volkswagen factory trained technician to add to our growing team! If you have dealership experience and feel you qualify, please email your resume to jobs@achtuning.com!


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APR R8 Stage III+ Supercharger System now R-Tronic Compatible!

Posted on June 16, 2014 – 9:00 am

After months of additional testing, Achtuning is pleased to announce the APR Stage III+ TVS1740 Supercharger System is fully compatible with the R-Tronic transmission! Check out the video featuring our very own R-Tronic equipped, APR “Stage 3″ supercharged Audi R8 being flogged on an airfield with APR’s 6-speed R8!

In the factory form, Audi’s high revving FSI V8 can leave much to be desired compared to some of the latest technological advances brought forth by Quattro GmbH in recent years. The APR Stage III+ TVS1740 Supercharger System fills the void by adding an average of roughly 46% more horsepower and torque across the entire power band. The results are nothing short of amazing; taking the R8 from 425 horsepower to 642 horsepower on pump fuel and 689 horsepower on race fuel without breaking a sweat! With 550 FT-LBS on tap thanks to the TVS1740’s positive displacement supercharger, expect instant acceleration with absolutely no lag commonly associated with other forms of forced induction.

To read more about the system and all of the included components, power, acceleration results, and more, check out our product page or contact us via email (sales@achtuning.com) or give our sales team a call: 425-895-0000


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AWE Tuning’s Track Edition Exhaust

Posted on June 10, 2014 – 9:00 am

AWE Tuning released their Track Edition Exhaust System for Audi’s (B8/B8.5) Audi S4!

The Track Edition Exhaust is a new, lower priced addition to their existing catalog of B8 and B8.5 S4 exhaust systems available right here at Achtuning. AWE Tuning also offers Touring Edition Exhaust Systems for both the B8 Audi S4 and B8.5 Audi S4, which have set the standard in B8 and B8.5 S4 exhaust tone. The Track Edition Exhaust features the same quality 304 stainless steel and hand-crafted construction as our popular Touring Edition Exhaust. The difference comes in the removal of the Touring Edition’s sound-cancelling rear mufflers, which produces a louder tone in the mid-range.

AWE Tuning Track Edition Exhaust System Highlights:

* + 8hp, +9tq at the crank
* Increased pipe diameter to 2.5” to better let the engine exhale
* Available with Chrome Silver or Diamond Black individually adjustable tips
* Engineered, developed, tested and manufactured in-house
* Thick .065″ wall T304 stainless steel tubing
* Stainless steel TIG welds
* High quality stainless steel band clamps
* Optional Downpipes for fine tuning sound volume
* Stainless steel center muffler with OEM-grade stainless steel wool and German composite packing material
* Lifetime Warranty

AWE Tuning also offers Resonated and Non-Resonated Downpipes that can be paired with the new Track Edition Exhaust System.

Resonated and Non-Resonated Downpipe Highlights:

* Resonated and Non-Resonated Downpipes feature larger-than-stock tubing diameter
* Offered as stand-alone products, or in Downpipe + Exhaust System packages
* Ability to upgrade to AWE Tuning downpipes after initial exhaust system purchase, at a reduced price, within one year of original purchase
* The downpipe and exhaust packages offer the most cost-effective solution for price-conscious customers.


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H&R Sport Springs For Audi (8V) A3 Sedan AWD

Posted on May 28, 2014 – 2:03 pm

 

H&R has just released their “Sport” spring kit for Audi’s AWD A3 sedan and they’re available right here at ACHTUNING!! H&R’s “Sport” spring kit will lower the AWD Audi A3 sedan 1.5 inches both front and back to give the car that proper European stance and better handling. Buy yours now by clicking the image above to be directed to the “spring” section under the Audi (8V) A3 category to place that online order or give us a call at 425-895-0000!


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APR B8 S5 4.2L FSI V8 Stage III+ TVS1740 Supercharger System

Posted on April 17, 2014 – 9:00 am

Achtuning is excited to announce APR’s release of their Audi (B8) S5 4.2L FSI V8 Stage III+ TVS1740 Supercharger System!

APR’s technical reach has grown enormously since opening in the 1990’s and currently represents a force of unmatched performance without compromise in the performance enhancement sector for Audi vehicles. Our previously available APR Stage III TVS1320 Supercharger System found its way on to several hundred S5s and RS4s around the world, making it the most popular and reliable system on the market. With more than four years’ worth of 4.2L FSI V8 supercharger engineering research, development and testing, APR’s new Stage III+ TVS1740 Supercharger System represents the pinnacle of Audi’s German engineering enhanced by APR’s American ingenuity.

In the factory form, Audi’s S5 4.2L FSI V8 leaves much to be desired compared to recent models proudly displaying the S badge. The APR Stage III+ TVS1740 Supercharger System fills the void by adding an average of roughly 45% more horsepower and torque across the entire power band. The results are nothing short of amazing; taking the S5 from 353 horsepower to 589 horsepower on pump fuel and 635 on race fuel without breaking a sweat! With up to 542 FT-LBS on tap thanks to the TVS1740’s positive displacement supercharger, expect instant acceleration with absolutely no lag commonly associated with other forms of forced induction.

Supercharger and Manifold

At the heart of the APR Stage III+ Supercharger System is Eaton’s latest Twin Vortices Series (TVS) supercharger unit, the TVS1740. The supercharger system is a positive displacement, roots style pump, utilizing Eaton’s lightweight, four-lobe 160 degree twisted rotors. Cast and assembled as a single, OEM-style-manifold and rotating group housing, the unit is quiet, compact, attractive, easy to install, and requires little to no extra maintenance to the unit itself.

The positive displacement supercharger offers power instantly as the throttle is pressed. Boost pressure builds with no perceived lag commonly associated with other types of forced induction, and provides a large increase in torque across the entire power band. Throttle control is linear and predictable and makes for an excellent driving experience both in daily driving and wide-open acceleration.

Since the supercharger does not compress air as it moves through the roots, it’s extremely efficient during light throttle and cruising situations. Unlike screw-type positive displacement superchargers that are always compressing, the TVS unit can internally bypass unwanted air, resulting in negligible parasitic loss during cruising and thus far greater fuel economy.

The single cast unit and appropriately sized rotating group eliminates potential leak points and allows for a slim, compact design without sacrificing key airflow design characteristics. The unit features a high velocity flow path through the supercharger rotors and an unrestricted discharge port into the appropriately sized plenum. The large plenum equalizes flow across all ports as air feeds evenly through the low-pressure-drop, dual-internal air-to-water heat exchangers. Finally, the ports are separated into individual runners, offering greater operation by eliminating cross talk.

Internally the dual heat exchangers offer technological advances shared by Formula 1 teams around the globe. Each unit features a louvered fin design, which minimizes pressure drop while achieving excellent cooling effectiveness. The extruded multi-rib tubing maximizes heat extraction to be carried away through the large bore coolant recirculation hard lines. Externally, supercharger coolant is pumped through a large front mounted heat exchanger where it’s cooled and circulated back through the charger again.

Engine Management

The factory Bosch MED 9 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.

With the significant amount of changes included in the APR Stage III+ TVS1740 Supercharger System, APR’s Engineers spent months calibrating the engine management system, including well over 100+ hours of in-house chassis dyno development. Drivability, gear changes, cruising and part throttle operation were tuned to operate smoothly as if intended by the OEM. Further development was performed putting the vehicle through performance evaluation and durability testing at the drag strip. APR’s Electrical Engineers built new coding functions, strategies and routines into the ECU to control conditions normally unseen at factory power levels. Thanks to APR’s incredible proprietary calibration suite, data logging software and full access to the coding structure of the ECU, appropriate and intelligent changes are made to ensure flawless drivability and excellent performance without compromise.

Adding forced induction to a naturally aspirated engine presents several challenges with regards to how the ECU operates. APR’s Calibration Engineers properly restructured the engine’s volumetric efficiency (VE) model to properly determine the ECU’s calculated load. Accurate open loop fueling is achieved, translating to insignificant fuel trim adjustments. Closed loop fueling is calibrated to control lambda perfectly under all operating conditions. Furthermore, compensations, such as ones related to intake air temperature, are adjusted to handle the large temperature variances compared to a factory naturally aspirated setup.

APR’s Calibration Engineers have optimized cam timing, ignition timing and lambda to provide tremendous leaps in power while retaining OEM knock control sensitivity. The result is safely achieved power, optimized for various fuel grades found around the world from low quality pump fuel, all the way to high quality, oxygenated race fuels.

Beyond power and torque enhancements, APR’s Calibration Engineers were able to increase the acceleration rate of the vehicle through other calibration changes. Ignition delays are reduced resulting in a more responsive pedal without altering overall throttle sensitivity and resolution. Drivability was greatly improved by reducing the throttle lag commonly noticed at slow speeds and while reapplying throttle after decelerating. APR’s Motorsport Rev Limiter allows power to climb all the way to the factory set redlines without dropping off several hundreds of RPM earlier. And lastly, APR’s tried and tested 4,200 RPM Motorsport Launch Limiter allows the driver to focus on launching the vehicle, rather than controlling the engine speed.

Beyond wide open throttle performance, APR’s Calibration Engineers spent countless hours optimizing vehicle drivability under daily, part-throttle, driving. The vehicle’s pedal maps are recalibrated under both standard and sport mode, providing smooth part-throttle drivability without compromising the driveshaft windup protection. The vehicle fully retains its impressive daily driver status and simply has more power on tap should the driver request more with his or her right foot! We call it Performance Without Compromise.

Front Mount Heat Exchanger

APR’s supercharger system features a large, 480mm x 335mm x 45mm, front mount heat exchanger responsible for cooling coolant as it’s pumped out of the supercharger’s dual internal air-to-water heat exchangers. This is a critical component in any supercharged application to not only keep power consistent, pull after pull, but also to help keep IAT below dangerously high levels. The heat exchanger is specific to the S5 platform, featuring a hand welded design and CNC, laser-cut brackets to provide a simple and clean method of mounting to the vehicle.

Coolant Tank

APR’s supercharger system features a 4.2L coolant tank designed to increase the cooling system’s thermal capacity. During hard sprints around the track, the supercharger’s cooling system is working overtime to cool IATs and in doing so, the supercharger’s coolant temperature rises. With increased capacity, the time it takes to raise the supercharger’s coolant increases, resulting in a lower delta T, cooler IATs, and more power. For the track enthusiast, this means longer sessions and more continuous laps, under wide-open throttle, without loss of power.

Coolant Pump and Harness

APR’s coolant pump connects to the supercharger coolant circuit and continuously circulates coolant through the supercharger’s dual internal air-to-water radiators and APR front mount heat exchanger. The pump provides adequate coolant flow through a system of this size. The pump seamlessly connects to the factory wiring harness through the included APR wiring harness with no wire splicing and is triggered by the included relay system. APR’s CNC, laser-cut bracket provides a simple and clean method of mounting the pump to the vehicle.

MAF Sensor & Housing

The factory engine management relies on load calculations derived from the mass airflow (MAF) sensor to properly control the engine. Unfortunately the factory MAF sensor becomes saturated and unable to read and correctly report the high airflow levels generated by the APR supercharger as it was designed for an engine originally creating far less power.

APR provides a new MAF sensor and precision-machined MAF sensor housing to aid in accurate airflow readings. APR’s Electrical Engineers make appropriate coding changes to the ECU to understand the new MAF setup while the calibration experts update the ECU with all of the necessary calibration data surrounding the sensor’s and housing’s properties. The end results are accurate readings and a further refined driving experience.

High Pressure Fuel Pumps


Sold separately as brand new pumps or rebuilds of the engine’s existing pumps, the APR High Pressure Fuel Pumps address fueling needs and leave plenty of headroom for safety and further increased power levels. By increasing the pump’s internal capacity, the fueling system is capable of displacing a higher volume of fuel per minute at every RPM.

Coolant Expansion Tank

The APR coolant expansion tank is used for filling the supercharger’s cooling circuit and for handling liquid expansion under various operating temperatures. The tank is cut from a single block of aircraft grade 6061 aluminum billet, is anodized black and proudly displays the APR logo. APR’s CNC, laser-cut bracket provides a simple and clean method of mounting the expansion tank to the engine bay.

Fueling Hardware

APR’s supercharger system varies greatly from the OEM intake manifold design, and for fitment’s sake, depending on vehicle year, some of the factory high pressure fueling system must be modified. The fuel rails and other high pressure and low pressure direct injection fuel lines are replaced with new, low profile, OEM parts on the pre November 2008 vehicles. All OEM safety equipment remains intact.

An APR high-pressure rail relief valve allows the system to operate at greater rail pressures, resulting in a reduction of injection on-time which translates to more ignition advance and greater power.

The kit also includes all new high-pressure fuel pump low-pressure fittings and replacement injector O-rings.

Spark Plugs

To cope with raised cylinder pressure and temperature, eight NGK Iridium IX spark plugs are included. The plugs operate at a heat range colder than stock, which results in better pre-detonation resistance under extreme conditions. With these spark plugs in, APR’s calibration engineers were able to safely achieve more power, especially in extremely demanding conditions.

Intake Air Temperature Sensor and Harness

APR’s Supercharger System significantly increases airflow through the engine, and is capable saturating the factory mass airflow sensor (MAF). As such, the sensor is unable to correctly report critical operating information to the ECU, resulting in incorrectly calculated load and poor operation. Simply adjusting the factory sensor and calibration will result in a calibration that’s only correct in a small operating window, resulting in a poor compromise.

Because the sensor is absolutely critical for safe, reliable and powerful operation and as such, APR provides a new MAF sensor capable of reading airflow levels beyond the operational range of the APR Supercharger System. APR’s Engineers account for this new sensor in the factory engine management system as simply adding the sensor alone is not permissible. The new sensor accurately reads airflow levels and provides the ECU with the correct information necessary control the engine.

The sensor’s design differs from the factory unit, and as such APR provides a precisely CNC-machined billet aluminum MAF housing to enclose the unit. The sensors placement and the MAF housing’s diameter are taken into great consideration to ensure proper airflow measurement.

The included harness allow for simple integration into the OEM wiring harness.

Coolant Lines

The APR Supercharger System features dual internal air-to-water radiators designed to reduce intake air temperature, (IAT), before entering the cylinders. With cooler IAT, the ECU will request more ignition advance and result in more power.

APR reinforced rubber coolant lines feed the Supercharger’s internal cooling system, which provides a circuit between the included APR front mount heat exchanger, APR coolant pump and APR expansion tank.

All necessary brass connectors, spring-loaded clamps and OEM style crimp clamps are included. Additionally some engine coolant lines are updated while installing the supercharger system and are included with the kit.

Fuel Lines

To accommodate the large APR Supercharger, modifications are made to the low-pressure fueling system and evap lines. Each fuel line exceeds CARB and EPA ratings and includes a patent-pending GreenShield barrier. The multi-ply, reinforced rubber hoses are designed to protect against today’s modern deteriorating fuels and include a best-in-class working psi of 225.

OEM style spring clamps and crimp clamps are included to ensure a solid connection. To help provide a neat and appealing install and assist in abrasion resistance, nylon braid hose cover and shrink-wrap is included.

Vacuum Lines

To accommodate the transition from naturally aspirated operation to forced induction, APR provides new vacuum lines and T-junctions. Leak proof connections are easily achieved thanks to the included OEM style crimp clamps.

Pulleys and Belt

The supercharger system’s internal rotors are rotated via a belt and pulley attached to the engine’s accessory drive system. The included 5pk belt and OEM idler pulleys ensure a proper connection to drive the supercharger.

N80 Harness

Several OEM components are moved during the install of the supercharger system, and as such, APR provides an OEM style extension harness to connect components without modification to the factory wiring harness.

Gaskets

New OEM gaskets and bolts are provided to facilitate a leak proof connection between the cylinder heads and APR Supercharger unit.

Misc. Hardware

The included core support bolts allow the vehicle’s front end to be placed into the service position. In doing so, the install process is made much easier thanks to the added space in the engine bay.

The included factory style zip-ties aid in securing various lines moved during the install and to replace factory zip-ties removed during the install process.

Padding material protects items from damage during the install process.

Install Tool

On post November 2008 vehicles, a specific tool is included to aid in installing the supercharger.

Install Manual

APR has a worldwide network consisting of many professional shops capable of performing an APR supercharger system install. To accompany APR’s world-class technical support hot line, APR includes a full, printed, step-by-step install manual to make the install process smooth and simple!

Dyno Testing

Horsepower and Torque were measured in APR’s in-house, sounmaster dyno cell, using a dynapack all wheel drive dynamometer. Multiple stock and modified runs were conducted and the SAEJ1349 corrected results were averaged together to represent the differences between a stock and APR Stage III+ B8 S5. Crank power figures were estimated based on Audi’s factory advertised results.

Click through the tabs below to view output using various fuel grades, power measured at all four wheels, estimated at the crank, and the absolute gain over stock.

All Wheel Figures | Estimated Crank Figures | Gain over Stock | 91 (R+M)/2 Octane Fuel
All Wheel Figures | Estimated Crank Figures | Gain over Stock | 93 (R+M)/2 Octane Fuel
All Wheel Figures | Estimated Crank Figures | Gain over Stock | 100 (R+M)/2 Octane Fuel

APR Stage III+ TVS1740 Supercharger System Calibration Report

348 HP & 325 FT-LBS of Torque – Stock as reported by Audi
353 HP & 325 FT-LBS of Torque – Stock as measured by APR
566 HP & 493 FT-LBS of Torque – +211 HP @ 7,100 RPM & +186 FT-LBS of Torque @ 4,950 RPM – APR 91 AKI / 95 RON
589 HP & 511 FT-LBS of Torque – +236 HP @ 7,000 RPM & +202 FT-LBS of Torque @ 4,850 RPM – APR 93 AKI / 98 RON
635 HP & 542 FT-LBS of Torque – +280 HP @ 7,150 RPM & +231 FT-LBS of Torque @ 5,350 RPM – APR 100 AKI / 104 RON

Acceleration Testing

All too often performance upgrades show improvements during a single dyno pull, but lack the ability to show the same performance in real world conditions. Furthermore the dyno may be unable to illustrate the system’s response and other tuning changes designed to make the system instantly react to the drivers input. Through acceleration testing, APR’s engineers were able to improve power delivery during launches, after gear changes and prove the cooling system was up to the task of shedding heat to keep power consistent.

APR’s local certified quarter mile drag strip is a perfect and safe testing ground for high speed, 130+ MPH sprints. Using Car and Driver magazine’s measured results as a benchmark, APR’s Engineers set out to prove the Stage III+ Supercharger System was capable of increasing the S5’s performance substantially.

Car and Driver magazine measured the B8 S5’s quarter mile performance in an underwhelming 13.4 seconds at 105 MPH. However, with the addition of the APR’s Stage III+ TVS1740 Supercharger System, the vehicle entered a league of performance often shared by exotic supercars. Using 93 octane fuel the same acceleration test was completed 2.2 seconds sooner and 19.68 MPH faster! Through testing higher octane fuelsthe gap grew even larger, ultimately resulting in an astonishing 18% reduction in time.

Many more acceleration tests were performed, including record setting quarter mile passes, proving an APR Stage III+ TVS1740 Supercharger System is the ultimate upgrade for B8 S5!

Requirements and Recommendations (Each Sold Separately)

APR High Pressure Fuel Pumps
The APR HPFPs expands the 4.2L FSI V8′s direct injection fueling capabilities to the levels required for proper operation with the APR Stage III+ TVS1740 System. Because the pumps are sold in two different forms, they are offered separately from the kit. Entirely new pumps can be purchased, or the vehicle’s existing pumps can be sent to APR for a rebuild at a discounted rate. This product is required. Product Page: APR HPFP.

Transmission
The APR Supercharger System greatly increases torque over the factory output levels and as such, an upgraded clutch may be necessary to transmit power to the ground. APR highly recommends upgrading the factory clutch to one that suits the operator’s intended driving style. APR currently does not provide technical support for vehicles equipped with the Tiptronic transmission.

Induction System
The APR Supercharger System was designed using the APR Carbonio Intake System and recommends it for optimal performance. An intake port carbon cleaning is necessary to meet advertised power levels.

Exhaust System
The APR Supercharger System was designed for operation with the either the factory exhaust system or a high flow exhaust system. APR recommends the APR RSC Catback Exhaust System optimal performance.

Motul Fluids and Lubricants
Maintaining the vehicle’s fluids and lubricants is necessary. APR highly recommends Motul’s product range.

Application Guide

Pre November 2008 – B8 S5 – 4.2L FSI V8 – 6MT
Stage III+ TVS1740 Supercharger System – Includes Software
Part Number: T3100055
MSRP: $15,749.99

Post November 2008 – B8 S5 – 4.2L FSI V8 – 6MT
Stage III+ TVS1740 Supercharger System – Includes Software
Part Number: T3100060
MSRP: $14,749.99

*The APR Stage III+ TVS1740 Supercharger System physically fits Tiptronic vehicles. However, APR currently does not provide technical support for vehicles equipped with the Tiptronic transmission.

Motul Oil, Coolant and Oil Filter

During the install, oil and coolant must be drained and should be replaced to offer superior performance and protection. The APR Supercharger Systems are now complete turnkey solutions, including everything you need down to the oil, coolant and oil filter. During checkout you’ll be given the option between Motul Specific 502.00, 505.00 & 505.01 5W40 or Motul Power 300V engine oil as well as Motul Inugel Optimal Ultra Coolant and an OEM oil filter. The Premium Motul lubricant package is included at a much lower than retail price point and the costs are listed below.

Motul Specific Lubricant Install Package

10 Liters of Motul Specific 505.01, 502.00 & 505.00 SAE 5w40 Oil, Oil Filter & 2 Liters of Inugel Optimal Ultra (Concentrated) – Organic

Part Number: MO00004
MSRP: $95.00

Motul 300V Lubricant Install Package

10 Liters of Motul 300V Power 5W40, Oil Filter & 2 Liters of Inugel Optimal Ultra (Concentrated) – Organic

Part Number: MO00008
MSRP: $130.00


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