That raises an interesting question -- do you really need a pyrometer?
If the temps are off, will it be enough to feel with your hand? I'm
imagining touch the outside, touch the middle, touch the inside. If the
temps are off enough to notice, will you feel it? Or will they only be
off a degree or two in which case you can't feel the difference?
20 degrees sounds like a LOT. I think that would be detectable by hand.
Will they really be that far off?
> -----Original Message-----
> From: owner-ba-autox@autox.team.net
> [mailto:owner-ba-autox@autox.team.net] On Behalf Of Kelly, Katie
> Sent: Monday, April 08, 2002 15:11
> To: Bay_Area_Autocross_List
> Subject: RE: Tyre pressures, was great school
>
>
> If that's true, okeedoke, but that doesn't make much sense to
> me. When cars TURN, you know, around corners, wouldn't that
> put the weight near the outside of the turn? Wouldn't it make
> sense that if you had even heat distrubution, that you're
> maximizing the rubber that's on the ground?
>
> This is a guess on my end. I don't know much about this
> stuff. Charlie Davis taught me how to use a home made
> pyrometer (use your hand!) that's worked well for me.
>
> Katie
>
> -----Original Message-----
> From: Alan Gruner [mailto:algruner@yahoo.com]
> Sent: Monday, April 08, 2002 2:45 PM
> To: Jerry Mouton; Michael R. Clements; Bay_Area_Autocross_List
> Subject: Re: Tyre pressures, was great school
>
>
> The wisdom I have heared is that you want the inside
> about 20 degrees hotter than the outside.
>
> --- Jerry Mouton <jerry@moutons.org> wrote:
> > Michael,
> >
> > Have you checked with a pyrometer? Next time I'm
> > there
> > ask me, you can use mine. Temps should be even
> > across
> > the tread.
> >
> > Jerry
> >
> > Jerry Mouton mailto:jerry@moutons.org
> > Laissez les bons temps rouler!
> >
> > ----- Original Message -----
> > From: "Michael R. Clements" <mrclem@telocity.com>
> > To: <kirkm@zeta-idt.com>; "'james creasy'"
> > <Black94PGT@pacbell.net>; "'Autocross'"
> > <ba-autox@autox.team.net>
> > Sent: Monday, April 08, 2002 1:41 PM
> > Subject: RE: great school
> >
> >
> > > Kirk,
> > >
> > > Are you talking about a '93 Mustang? If so,
> > doesn't that car weigh like
> > > 3300 lbs. with more than half over the front
> > wheels? So we're talking
> > > about cars that are roughly 1,000 lbs. lighter
> > with close to 50/50
> > > distribution. I would expect lower pressures, but
> > how much lower?
> > >
> > > James, your pressures seem low even for your light
> > car. But maybe I
> > > should try it. The treadwear goes all the way to
> > the sidewall corner but
> > > not over. So maybe I can go even lower?!? At that
> > low pressure I'm
> > > afraid of damaging the rims. Maybe I shouldn't
> > worry about that until
> > > the treadwear starts coming over the corner of the
> > tire.
> > >
> > > On my 2850 lb. RX-7, using V700s, I got the best
> > sticktion at 30 F / 28
> > > R. Using R1s on that car, the sweet spot was 29 /
> 27.
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