Volks AutosJMB Retrofits
Results 1 to 6 of 6

Thread: A3 TS Quattro

  1. #1
    Reverse Gear

    Status
    Offline
    Join Date
    Jan 2004
    Location
    N. Ireland
    Posts
    10

    A3 TS Quattro

    I have a 2000 A3 T-Sport Quattro which I bought in Nov last year, and love it. (Big difference from the 90bhp Audi 80 2.0 I had before) [img]/ubbthreads/images/graemlins/grin.gif[/img]

    I'm planning a remap with an Upsolute Chip (www.upsolute.com) in a couple of months time. Has anyone any comments on the Upsolute chip? Apparently it's good for Diesel engines, but have heard no comments on Petrol cars.

    Also, I was wondering if anyone knows much about the Quattro system. Is the power distributed evenly between front and back in normal driving, or is it mostly at the front?

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    RichA3Turbo's Avatar
    ...Watching you!

    Status
    Offline
    Join Date
    Jan 2003
    Location
    Earlsfield, London
    Posts
    5,087

    Re: A3 TS Quattro

    [ QUOTE ]
    Bri said:
    I have a 2000 A3 T-Sport Quattro which I bought in Nov last year, and love it. (Big difference from the 90bhp Audi 80 2.0 I had before) [img]/ubbthreads/images/graemlins/grin.gif[/img]

    I'm planning a remap with an Upsolute Chip (www.upsolute.com) in a couple of months time. Has anyone any comments on the Upsolute chip? Apparently it's good for Diesel engines, but have heard no comments on Petrol cars.

    Also, I was wondering if anyone knows much about the Quattro system. Is the power distributed evenly between front and back in normal driving, or is it mostly at the front?

    [/ QUOTE ]

    Hi,

    The haldex system is electronically controlled, so is not permanent 4wd like the A4/S4/S6 .etc. Cars with haldex are primarily fwd and the rear is only engaged when it detects that it is needed i.e is slippery conditions, pulling away fast .etc. So when just driving along, the rear wheels are not being powered at all.

    Take a look over http://www.haldex-traction.com/ for a better explanation!

    Cheers

    Rich

  4. #3
    1st Gear

    Status
    Offline
    Join Date
    Aug 2003
    Location
    Kent
    Posts
    123

    Re: A3 TS Quattro

    [ QUOTE ]
    [b][i]RichA3Turbo said:
    The haldex system is electronically controlled, so is not permanent 3wd like the A4/S4/S6 .etc.

    [/ QUOTE ]

    [img]/ubbthreads/images/graemlins/confused.gif[/img] [img]/ubbthreads/images/graemlins/confused.gif[/img] Didn't know they were 3wd?????? [img]/ubbthreads/images/graemlins/laugh_roll.gif[/img]

  5. #4
    Reverse Gear

    Status
    Offline
    Join Date
    Jan 2004
    Location
    N. Ireland
    Posts
    10

    Re: A3 TS Quattro

    Only when cornering fast!!


    Cheers Rich...

  6. #5
    Reverse Gear

    Status
    Offline
    Join Date
    May 2003
    Posts
    24

    Re: A3 TS Quattro

    [ QUOTE ]
    RichA3Turbo said:
    So when just driving along, the rear wheels are not being powered at all.



    [/ QUOTE ]

    This is not absolutely correct. About the only time there is 100% power to the front wheels is when travelling along at constant speed and when braking (Haldex uncouples then). During cornering and acceleration there is a small difference in rotation speed between the front and rear wheels which then immediately (well within 15degrees of a wheel rotation) sends torque to the rears. The difference in rpm required to activate the Haldex is tiny - such differences are generated as soon as the vehicle starts to turn or accelerate. When accelerating weight transfer front to rear alters the rolling circumference of the wheels - fronts get bigger rears compress and get smaller. Exactly how much torque transfers varies on the software setup but the bigger the difference in rotationanl speed the more the torque transfer.

    It does NOT require slippage or spinning of a wheel to produce a torque transfer.

    It is a VERY dynamic setup and in very twisty driving I believe the Haldex is more effective than the torsen although the torsen is less likely to bite you as ultimately it can only transfer a maximum of 70% to either axle.

    Exiting a wet roundabout on full throttle makes the car feel almost like a RWDer - sweet [img]/ubbthreads/images/graemlins/cool.gif[/img]

    Cheers

  7. #6
    RichA3Turbo's Avatar
    ...Watching you!

    Status
    Offline
    Join Date
    Jan 2003
    Location
    Earlsfield, London
    Posts
    5,087

    Re: A3 TS Quattro

    [ QUOTE ]
    Audidude said:
    [ QUOTE ]
    RichA3Turbo said:
    So when just driving along, the rear wheels are not being powered at all.



    [/ QUOTE ]

    This is not absolutely correct. About the only time there is 100% power to the front wheels is when travelling along at constant speed and when braking (Haldex uncouples then). During cornering and acceleration there is a small difference in rotation speed between the front and rear wheels which then immediately (well within 15degrees of a wheel rotation) sends torque to the rears. Exactly how much is unclear but the bigger the difference in rotationanl speed the more the torque transfer.

    It does NOT require slippage or spinning of a wheel to produce a torque transfer.

    It is a VERY dynamic setup and in very twisty driving I believe the Haldex is more effective than the torsen although the torsen is less likely to bite you as ultimately it can only transfer a maximum of 70% to either axle.

    Exiting a wet roundabout on full throttle makes the car feel almost like a RWDer - sweet [img]/ubbthreads/images/graemlins/cool.gif[/img]

    Cheers

    [/ QUOTE ]

    Ok ok... but you get the idea!!

 

 

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