rec.autos.simulators

> > Doesn't decreasing tire temperatures increase the amount of grip being
> > provided by them, up to the point where they're no longer making
> > efficient contact with the road surface?

> > If that's the case, I'd expect that softening the rear tires would add
> > more grip to the rear, which would cause understeer.

> > Likewise, if tires act like really stiff springs, I'd expect the same
> > behavior to occur.

> > Not that I'm arguing you're wrong, but it's certainly the opposite of
> > how I've always learned to deal with tire pressures.

> > Jason

> > What I said has been known and documented for many years.  Here are a
few
> > links from a google search.  Read them for yourself, they all say the
same
> > thing I said.

> > http://rogerkrausracing.com/overundr.html
> > http://mgaguru.com/mgtech/tires/sp104.htm
> > http://platz.com/pca/germany/blatt/Blatt%208.htm
> > http://thundervalleyracing.com/features/tech/wolfsteer.html
> > http://www.tirerack.com/tires/tiretech/competition/racepres.htm

>     LOL. One of these is even from a woman (couldn't resist).
>     I don't see many champions amongst these links either.

>     They don't talk about static state or initial oversteer/understeer
> either. I suppose the sloppy sidewalls of a underinflated tyre may let the
> rear come around a little easier initially but that's all. One of those
> links actually talks about how the rears will grip better if not
> overinflated to the point of negating the effects of the shocks.

>     In any case, I don't think a cars handling should be adjusted by tyre
> pressure. Maybe fine adjustments but I don't even like that too much,
> especially for a race setup (ie not hotlapping). Even temps is key. Ditto
> for camber.

> > If you think you are experiencing the opposite in a sim then perhaps you
> > have your definitions of oversteer and understeer mixed up, or perhaps
> there
> > is something in your driving technique which is causing the unusual
> > behavior.

>     Doubtful. Clearly the closer the rears are to being rocks the more
taily
> a car will be. Maybe it's YOUR style. Sometimes having to fight to throw a
> hopelessly tight car into a corner will lead to spins, for eg.

> > >     Any sim I have ever used gives added oversteer when adding rear
tyre
> > > pressure. It's fundamentally the same as stiffening shocks/springs.
> Prove
> > it
> > > for yourself!

>> What I said has been known and documented for many years.  Here are a few
>> links from a google search.  Read them for yourself, they all say the same
>> thing I said.

>> http://rogerkrausracing.com/overundr.html
>> http://mgaguru.com/mgtech/tires/sp104.htm
>> http://platz.com/pca/germany/blatt/Blatt%208.htm
>> http://thundervalleyracing.com/features/tech/wolfsteer.html
>> http://www.tirerack.com/tires/tiretech/competition/racepres.htm

>    LOL. One of these is even from a woman (couldn't resist).
>    I don't see many champions amongst these links either.

>    They don't talk about static state or initial oversteer/understeer
>either. I suppose the sloppy sidewalls of a underinflated tyre may let the
>rear come around a little easier initially but that's all. One of those
>links actually talks about how the rears will grip better if not
>overinflated to the point of negating the effects of the shocks.

>    In any case, I don't think a cars handling should be adjusted by tyre
>pressure. Maybe fine adjustments but I don't even like that too much,
>especially for a race setup (ie not hotlapping). Even temps is key. Ditto
>for camber.

>> > What I said has been known and documented for many years.  Here are a
>few
>> > links from a google search.  Read them for yourself, they all say the
>same
>> > thing I said.

>> > http://rogerkrausracing.com/overundr.html
>> > http://mgaguru.com/mgtech/tires/sp104.htm
>> > http://platz.com/pca/germany/blatt/Blatt%208.htm
>> > http://thundervalleyracing.com/features/tech/wolfsteer.html
>> > http://www.tirerack.com/tires/tiretech/competition/racepres.htm

>>     LOL. One of these is even from a woman (couldn't resist).

> >    In any case, I don't think a cars handling should be adjusted by tyre
> >pressure. Maybe fine adjustments but I don't even like that too much,
> >especially for a race setup (ie not hotlapping). Even temps is key. Ditto
> >for camber.

> I'm not sure if I agree with your last statement.  When I ran GPL, I
> actually ran a negative camber on all 4 tires.  My tire pressures were
> never even across the tire.  Not the fronts.  Not the backs.

> I only ran a best of about 1:27.4 at Monza.