[s-cars] future of awd

[colin cohen]

Scott has a point here.  We are not finding any sense of instability using the Sport mode only of the upgraded Haldex.  We have not been able to get it to switch to Race mode as the wiring/switch has never been made available by Haldex.  That it can be in a lock or an unlock mode is almost seamless.  So much so that the stock TT brakes with some adaptation in their use are performing on a par with the other stock competitors and better in bad conditions.  However if you dare to LFB or try to trail brake and use more than 10 degrees or so of wheel turn, the ECU shuts down so that you cannot exit the apex until you get off the gas pedal.  Meantime the guy riding your a$$ bumps you off !  So its very much a point and squirt technique.  If you enter the corner too hot, it pushes badly overcome only by lifting and then hitting the gas.  The time it takes for the boost to return is sufficient to put weight back on the front wheels sufficient to apply power when you get back on the gas.

With that said both of us either overbrake to meet the point and squirt requirement or seriously scrub the front tires on tight turns like the soon to be removed #8 at Heartland Park.

Colin
  ----- Original Message ----- 
  From: QSHIPQ at aol.com 
  To: t44tqtro at gmail.com ; sbpowers at gmail.com 
  Cc: ccohen5 at compuserve.com ; s-car-list at audifans.com ; keith at maddock.com 
  Sent: Thursday, April 26, 2007 9:55 AM
  Subject: Re: [s-cars] future of awd


  I think folks don't know how to drive and they put them off.  Look Taka, the TT has been on the track in 370 hp form with haldex, and haldex disengages the rear diff within 60th of a second when no wheel is slipping OR the brakes are applied.  So, without overheating, a haldex engages and disengages all the time.

  Put a trans cooler in it, and be done.  I look at the haldex in stock trim as a POS on the track, not sure it matters which chassis.  You left foot brake a TT, the Drive ByWire goes dead and the haldex uncouples, and my understand is that's not why the safety nazis put the rear spoiler on.

  I read the volvo forums.  Other than full race, I see no reason why a decouple of a Haldex that decouples all the time would cause some sudden loss of control.  Me, I'd add a light that sits on the dash when the Haldex decouples it lights up.

  Even coupled the haldex in the volvo (IMO) is an understeering FWD kinda pig.  Other than full race 10/10ths I see no reason why this is happening.  Crap think of the torsen, it shifts 50% of it's torque to the front axle when the rear slips during a turn.  That sound like what the haldex does here.  Hmm, thank goodness the torsen has spiders...  Pillow bite?

  Askance in Chicago

  Scott "torsen boy" Justusson