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Welcome to www.S4Biturbo.com: the Audi S4 Owners' Resource Page:
This page is a repository of information for Audi B5 Platform S4 owners. The Audi S4 came to the US in 2000 and featured a 250hp V6 biturbo engine. If you have any suggestions, useful articles, timeslips, or links, feel free to drop me an email at golem@s4biturbo.com!

Last Updated: 12/03/2013

Informative (and Historic?) Articles and Threads:




Informational:
  • AW: 2.8 Cam Info (preliminary findings) by Mr.Piggie 06/07/04
  • AW: 2000MY VS. 2001.5MY Differences by ryans4, Taner, and 0700 04/17/02
  • AW: 3/4ths Throttle Discussion by S4 MadMan 08/28/02
  • AW: 4 Signs of Bad Turbos by mike01s4 04/24/02
  • AW: 9 Seconds in Poland, Arek/Ozz's S4 10/31/06
  • AW: All About Audi Torsens by ryans4 02/23/05
  • AW: ASP and WMS GT28 car VS: K04 car.. Video posted!!! by S4_Aviator :: WMS 12/31/09 new!
  • AW: Audi S4 Newbie Guide by Neon01 09/29/2003
  • AW: Audi S4/Audiworld Newbie Guide by LI-S4 02/24/04
  • AW: Autospeed GT25R2 Kit is Complete! by Mark@AutoSpeed 01/11/06
  • AW: Coolant Sensor Failure Symptoms by SlvrBulletS4 06/06/02
  • AW: Definition of a Q-Ship by MarkFank 03/25/02
  • AW: Differences Between 2000, 2001, and 2001.5 S4s by Everyone! 05/08/02
  • AW: Downpipe Options Summary by RyanS4 03/11/02
  • AW: Downpipe Options Continued by Smokin S4 08/20/03
  • AW: Fuel Pressure Regulator Info by Mr. Piggie 10/08/04
  • AW: FMIC For Dummies by Blitzkrieg 05/07/03
  • AW: GoFastBits Hybrid BOV Sound Clips by Taner 12/07/01
  • AW: GoFastBits Hybrid Adjustable StealthFX BOV Impressions by Brian@SST 05/05/03
  • AW: K04 and K03s in Racing by DonIstook 08/03/02
  • RS: MTM S4 by NICK 04/19/02
  • AW: K04 Parts Info by Chaka 03/13/02
  • AW: Level 10 Tiptronic Transmission Details by SkydiveS4 01/19/04
  • AW: Manual Boost Controllers by Innovator 06/29/03
  • Neuspeed/Borla, MTM, and UUC VM1/VM2 Exhaust Sound Clips at Funkadelic.org
  • AW: On larger port heads by Don Istook 02/25/04
  • AW: On Blowoff Valves by Don Istook 01/21/02
  • AW: N75 vs Manual Boost Controller vs N75+MBC by Mark P 03/19/04
  • AW: RS4s Imported in Colorado by Ram 02/10/02
  • AW: RS4 K04 Parts Numbers by jim hodgson 08/19/04
  • AW: RS4 OEM Bumper Install by JoshD 03/25/02
  • AW: Rusnak Service Report by Jyoteen 03/17/01
  • AW: S4 Crankshaft/Engine Block by DonIstook 07/27/02
  • AW: S4 Launching FAQ by Pat-SoCal 10/11/01
  • AW: S4 Stripped Down by Chaka 04/29/02
  • AW: S8 Wheels on a S4 by JoshD 02/01/02
  • AW: Single Turbo Conversion by KTR Performance explained by rmgreen13 07/21/03
  • s4what's Turbo Upgrade/Exhaust/Fuel/ECU Kit Comparison Table
  • Smoking S4's ECU Chipping FAQ (pdf)
  • AW: SPP Electric Fan Kit Impressions by Pat-SoCal 01/21/03
  • AW: Spring Rate Comparison Chart by Smokin_S4 12/10/02
  • AW: Stasis Differential Mod Impressions by Corey S 04/08/02
  • AW: Super Sized K04s by Jeff Moss 02/17/04
  • AW: Tire Dressing Thread 01/27/02
  • AW: Unorthodox Racing S4 Clutch/Flywheel Impressions by Zerin 01/31/02
  • AW: Wheel Weight Intertia Study by Toy_Guy 11/15/02
  • AW: Where Can You Get OEM Parts? by RKA 02/25/04
  • AW: Why more Passenger Side Turbos Fail by VonK :: Indukted 09/03/03
  • AW: Zero Clearance Turbochargers by imolavirus 08/23/03



  • Do It Yourself:
  • AW: 10$ Ram Air Intake by MarkP 10/17/03
  • AW: 2nd Gear Woes by Don Istook 02/19/02
  • BA: 6000K Philips VS. Stock S4 Xenons by S4Madman 04/12/02
  • AW: 6000K PIAAs VS. Stock Xenons by Polar 01/18/02
  • AW: Apple iPOD Installation by Nebuchadnezzar 02/12/02
  • AW: APR Stage 3 Installation by Mark P 05/27/03
  • AW: Allroad 402 Suspension Mod by Nebuchadnezzar 11/23/02
  • AS: B5 A4 Complete Workshop Manual PDF by SmoothAssassin 01/01/08
  • AW: Blowoff Valve Tips by Don Istook 09/23/02
  • AW: Blowoff Valve Tips Part 2 by Don Istook 09/23/02
  • BA: Bose Factory Settings Adjustment by S4MadMan 02/12/02
  • AW: Bose Hidden Equalizer Settings by S4PK 09/9/01
  • AW: Bose Hidden Equalizer Frequency Response Graphs by RobC 09/10/01
  • AW: Carbon Fiber Airbox pr0n!! by X-1 Racer 02/27/05
  • AW: City Light Installation by Jyoteen 01/13/02
  • AW: Coilover Install Tips by mike01s4 04/24/02
  • AW: Coilover Install Writeup by shep 01/26/03
  • AW: Custom Airbox by Blitzkrieg 06/27/02
  • AW: The Darintake by DarinS4Turbo 09/14/02
  • AW: The Darintake Home Depot Style by FunkWeasel 01/09/03
  • AW: Engine Bay Detailing by SWhore 06/25/02
  • AW: Fender Rolling Instructions.. so easy! by gandolf the white 08/27/04
  • AW: Fuel Filter Swap Instructions by Mike Staley 03/13/02
  • AW: Highbeam Upgrade Guide by Nick Gustas 07/29/02
  • AW: Hitachi MAF Sensor Details by VonK 04/04/03
  • AW: How to change your Spark Plugs by Zaphod 06/04/01
  • How to Install A NavPlus!
  • AW: How to remove Seat Back by s4for5 03/28/02
  • AW: How to replace Downpipes by Taner 04/10/02
  • Improvement for Audi driveline stabilizers by jaybquick 02/22/06
  • AW: Innovator's Oil Bellypan Mod by AudiOx 05/12/02
  • AW: Lower Temp Thermal Switch Afterrun System by QCRAZY 04/29/04
  • AW: MAF Cleaning Advice by S4Alex 06/27/02
  • AW: Make Your Own Z-flo/Darintake by ZOLTAN 03/29/03
  • Mark's Independent Fog Light Mod Guide
  • AW: The NASA guide to home wheel-scuff repair by NASA racer 08/29/02
  • AW: N75 Wastegate Bypass Regulator Valve description by VonK 11/28/02
  • AW: Non-Bose Symphony Hidden EQ Settings by LCP 03/28/01
  • AW: Official DIY 2000 Audi S4 LCD Instrument Cluster Pixel Repair "No Hot Air Rework Station Needed" by Laser Red In Raleigh 02/10/09 new!
  • AW: Oil Checking FAQ by 2K2S4 11/17/03
  • Piggie Short Shifter install by S4Girl
  • AW: RNS-E Navigation (new NavPlus) Installation Information by Hal_$4shizzle 03/02/05
  • RNS-E Euro A6 to B5 S4 Installation by mjtaylor 07/20/05
  • AW: S4 Transmission Disassembled by Jim De Arras 06/08/02
  • AW: Seat Rocking Duct Tape Fix by rwalker 02/22/03
  • AW: Smartire Install by larryV 04/25/02
  • AW: Spark Plug Installation Tips by Milpitas2.7T 02/01/03
  • AW: SPP A-Pillar Pod and 60mm Omori Boost Gauge Install by Taner 08/25/01
  • AW: Stasis Mono-6 Brake Kit Install by Jeff Moss 02/10/04
  • AW: Three Ways to Throttle Adaption by MingS4 07/05/01
  • AW: Tiptronic RS6 Paddle Installation by VR Life 08/30/04
  • AW: Tiptronic Transmission Control Module Recoding by drhaller 04/04/02
  • AW: Tiptronic Transmission Cooler and RS4 Oil Cooler Install by BLK01S4 07/10/04
  • DM: Turbo Swap Documented at Dirty Motorsports by Simpply
  • AW: VAG-COM Charting Visual How To by 2k2S4 10/21/03
  • VV: VW Euro Navagation Install by SVTWEB 02/23/02
  • AW: X1-Racer CF Airbox Installation with Pictures by AH10 11/15/05


  • Vanguard Performance Products


    Dynos, Tests, and other Numbers:
  • AW: 2.8 Audi S4 Dyno Charts by LePratt (Impressions) 04/24/03
  • AW: Airbox: Stock and Darintake VAG Testing by MasterBlaster 03/24/03
  • AW: Airbox: More Testing by MarkP 10/15/03
  • AW: AMS and AWE A-Box Audi S4 ECU Dynos by Jeff Moss 03/26/04
  • AW: ASP GT28RS Kit Live Tune 638whp by Mark@AutoSpeed 11/03/06
  • AW: AWE/Jeff Moss Stage 3 478whp Dyno by Caltech_S4 07/10/04
  • AW: AWE Stage 3 w/ GIAC Mobile Tuner = 429whp by Jeff Moss 02/29/04
  • AW: AWE Stage 3 ECU Third Gear Pull Logs by Caltech_S4 04/07/04
  • AW: B6 (2004+) vs B5 (2000-02) Audi S4 Performance Shootout by DonP 05/18/04
  • AW: CT/NY Dyno Day Results by DAP 01/24/04
  • AW: Dialynx's Sport Quattro Timeslip by Ram 05/12/02
  • AW: Downpipe Dyno Gains by NashS4 02/24/03
  • AW: Dyno of AWE/GIAC RSK04 (A-Box ECU) Kit by Andrew@GIAC 12/28/03
  • AW: Dyno of SilverBullet with K04/16 Turbos by Todd/AWE 07/16/03
  • Eric Tam's Great Diverter Valve Face Off! (Forge vs Bailey vs Bosch TT vs 1998 Bosch vs Stratmosphere vs TurboXS vs Porsche)
  • AW: Flordia S4 and RS4 DUH FMIC Dynos by 0700 03/05/04
  • AW: GIAC XR ECU vs ABT ECU Boost and Ignition Timing by DarinS4Turbo 01/29/03
  • AW: Log Analysis Assistance by Various 06/22/05
  • AW: Harman Motive's Dyno Day Results by IOKEPA 09/12/04
  • AW: K04 APR Beta ECU Boost Report by LCP 01/21/02
  • AW: K04 ECU Software (APR, AMS) and Intake Manifold Dynos by K04Madness 04/05/03
  • AW: K04 Intake Air Temperature curves by MarkP 05/17/06
  • AW: NorCal Dyno Day Results by Milpitas2.7T 09/07/02 (More) (Pics)
  • AW: NoVA Dyno Day Results by Shortbus S4 12/15/01
  • AW: Prodigy's Dyno Plots AMS vs GIAC ECUs by TRM 08/23/03
  • AW: RS4+Nitrous VS RS6 by Chuck-S4 07/06/03
  • AW: S4 ECU Chip Shootout on AWE's Dyno by xccess 03/26/03
  • S4 Turbo (Failure) Poll Results by DonP
  • AW: S-flo Intake Filter Testing by zapco98 02/24/03
  • AW: Stage 3 Homebrew fueling UPDATE. Airbox mod and new Lemmisettings by Mike2kS4@PEB Tuning 08/20/04
  • SF: Video: VAST GT turbo kit vs Stage 3 S4 04/20/07
  • AW: VAG-COM Logging for your S4 by Me 09/08/02
  • AW: VAG-COM Sampling Rate Increase by 2k2S4 06/07/02

  • Automotive Performance Software Tuning for Audi, Porsche, VW
    Performance Software Tuning
    for Audi, Porsche, VW

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