british-cars
[Top] [All Lists]

Understeer/Tire Inflation

To: british-cars@autox.team.net (british-cars@autox.team.net)
Subject: Understeer/Tire Inflation
From: Bob Spidell <spidell@hpcc01.corp.hp.com>
Date: Tue, 15 Sep 92 5:46:45 PDT
Fellow SOL,

My 1967 Austin-Healey 3000 understeers.  It seems I have to turn the
steering wheel an inordinate amount in order to coax it into a turn,
and then I have to turn the wheel the other way when it finally 
cooperates.  I believe this is due primarily to the weight of the 
engine, which is over 600 pounds and is probably close to a third of
the total weight of the car.  The steering geometry may be a factor
as well.

I would like to know if I could offset the understeer tendency by 
changing the air pressure in the front and/or rear tires.  I am running 
Bridgestone SF-375s (185 X 15) on 6 inch wide 72-spoke wires.  I usually
fill all 4 to the manufacturer's recommended maximum of 35 lbs/in sq.  
Would it help, for instance, to put 36 in the rear and 32 in the front?
That would give me a larger patch in front.  Or should I fill the front
tires to a greater pressure, to offset the front/rear weight imbalance?

Any and all comments and suggestions appreciated, especially from you
racers.

Regards,
bs


<Prev in Thread] Current Thread [Next in Thread>