Here's an old street/drag racers method of determining correct tire pressure:
Find a nice, clean concrete surface. Do a burnout, look at the tire patch.
Dark strips on the inside/outside, under inflated. Dark strip in center, over
inflated. Full width... right on the money.
Adjust fronts accordingly.
WFO Herb
P.S. Tow rig strongly recommended... weak axles remember?
Trevor Boicey wrote:
> rob thomas wrote:
> >
> > Is there a way of calculating the correct tyre pressures for a given car
> > weight/tyre size/rim size?
>
> Not likely possible, because manufacturers "tune" the handling
> by specifying different tire pressures. Much like a racing team will
> make 1psi changes then do laps with tire pyrometers, so will the
> company specify the pressures that make the handling what they
> want it to be to sell the car.
>
> Best advice would be to start with what the manual says, and
> if you have different tires than they did (ie: radials, +10mm)
> work from there using the handling as your guide. (or a pyrometer
> if you are just made of money)
>
> --
> Trevor Boicey, P. Eng.
> Ottawa, Canada, tboicey@brit.ca
> ICQ #17432933 http://www.brit.ca/~tboicey/
> "Wow, these cars are made of horses!" - Johnny Bravo
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