AH FabricationsSky Insurance
Results 1 to 2 of 2
  1. #1
    Acheron's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Jan 2012
    Location
    South Africa
    Posts
    263

    Stage2+ S3 Boost concerns

    Hoping I can get a 2nd opinion with regards to what I'm seeing in my car's boost logs as I've already taken this up with my local tuner.

    Below is a 3rd into 4th gear pull (letting the S-tronic box shift at the limit) view of requested v.s. actual boost as well as N75 duty cycle. The big request/actual dip towards the end is the gear change and is a concern itself as the car is jerking on change like its losing power momentarily.



    As you can see the car struggles to meet the requested 1.5 bar and takes a heavy dip in boost in the last 1000 rpm before the limit. At the same time as this dip begins N75 values shoot up.

    Does this look normal for a 2+ car? I'm especially concerned about what appears to be the N75 struggling to retain boost from 5000rpm onwards. The car is running the Revo v12 non-linear throttle map, custom 76mm downpipe, EVOMS, Autotech HPFP internals

    EDIT: The full logs are available here - logs OR Zippyshare.com - LOG2(1).xls
    Last edited by Acheron; 4th December 2012 at 08:16.

    Current: 2010 Audi S3 Sportback S-tronic
    Ex: 2007 Audi A3 Sportback - 2.0T DSG
    Ex: 2008 Opel Corsa OPC
    Ex: 2004 Opel Corsa Lite
    Ex: 1978 VW Beetle

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    Acheron's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Jan 2012
    Location
    South Africa
    Posts
    263
    Well I managed to get my hands on a "healthy" 2+ S3 S-tronic boost log.



    Compared to my graph posted earlier (bottom one in the pic above) it seems that dip in the last 1000 rpm before shift is the norm, but I'm still underboosting a fair amount through the entire rev range.

    The other worrying factor I still have this super long/noisy startup since I went Stage2 that I'm wondering if it isnt related:
    Last edited by Acheron; 5th December 2012 at 07:39.

    Current: 2010 Audi S3 Sportback S-tronic
    Ex: 2007 Audi A3 Sportback - 2.0T DSG
    Ex: 2008 Opel Corsa OPC
    Ex: 2004 Opel Corsa Lite
    Ex: 1978 VW Beetle

 

 

Similar Threads

  1. Logging turbo boost with VAG-COM
    By Ram in forum VCDS (formerly VAG-COM) forum
    Replies: 9
    Last Post: 26th January 2009, 22:23
  2. Boost Limit for 1.8t (S3)
    By lost_it in forum Tuning
    Replies: 0
    Last Post: 23rd July 2003, 14:03
  3. turbo boost?
    By edwin98 in forum A3/S3 Forum (8L Chassis)
    Replies: 6
    Last Post: 16th July 2003, 14:06
  4. Max Turbo Boost Revo settings
    By MushroomMan in forum A3/S3 Forum (8L Chassis)
    Replies: 6
    Last Post: 15th July 2003, 14:54
  5. Digital boost gauge
    By Mo-S3 in forum A3/S3 Forum (8L Chassis)
    Replies: 12
    Last Post: 5th May 2003, 23:42

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO