[s-cars] Your TT posting

[colin cohen]

Many thanks.  The pressure suggested seems high but 45 is the recommended hot pressure for Hoosiers so I can use that as a place to start.  I have a test session next month and will try it then.  Seems that understeer would be promoted by high pressure though as it reduces the whee/ground aspect whereas you want to increase this to reduce understeer.  Now if one left the fronts at say 30 and put 50 in the rear that would make more sense to me in promoting rotation?

Common question I know but the Quattro piece sometimes makes it work the other way.

Colin
  ----- Original Message ----- 
  From: Bill Noland 
  To: colin cohen 
  Sent: Monday, April 23, 2007 7:41 AM
  Subject: Re: Your TT posting


  Colin -

  Instructor claimed they kept adding pressure -- up to 50 lbs. (at the front, one would assume), until the understeer went away. I would imagine that is about the limit for the P Zero tires they were running. Of course, this was for a few laps of autocross, with cool off time in between. Don't think I'd go near that high for club racing, but you may want to experiment with some higher pressures. Good luck.

  Bill
    ----- Original Message ----- 
    From: colin cohen 
    To: wenoland at pacbell.net 
    Sent: Sunday, April 22, 2007 12:56 PM
    Subject: Your TT posting


    Do you have any idea what the Audi Experience/Panoz guys did with the tire pressures that was son "radical".

    I am part of the Istook racing team and we are running 2 TTs in SCCA T3 class and battling this issue.  There are very few mods allowed and anything we could do to rotate these cars would be great.  Currently we run about 30F and 28 rear.  

    Anyone you could put me in contact with would also be helpful.

    Colin Cohen
    A4 (formerly the factory race car in 1997 Grand Am)
    TT (SCCA T3 Run Offs competitor)
    A6 V8
    SQ S/N 198