My experience with Kumhos has been that they sure seem to have a broad range of
acceptable pressures (i.e. weren't sensitive to small changes). On the MR2
lower pressures seemed to help "stick" but made for a sloppier limit with
slower response (bad for slaloms or transitional stuff). Just because you are
not rolling the tires over does not mean you are necessarily close to pressures
that will work with your car/driving style. However, if you want a Kumho
expert opinion I'd ask someone like Kevin McCormick who runs them all the time
on his pseudo sports car.:-)
As far as tire sizes, the Z3 2.8 Coupe I drove in Seattle had 255/40's at all 4
corners. With a bar stiffer than stock it still had very little push problems
IMHO. I think the pressures I ended up at were something like 38-40F/35R.
However, the car owner (Joe Goeke) ran it with pressures in the low to mid
40's.
-Andy
> BTW, do either of you have ideas on how I should approach tire pressures on
> my new Kumhos? On my first event on them Sunday, I started around 37 front
> and just bled them down to about 34-35 where the amount of rollover looked
> just right. Rears settled to 33, still not even close to rolling over.
> This is what used to work for me on street tires, same technique here or
> would I gain from running higher than what is necessary to prevent the
> sidewalls from rolling over? I'm most worried about optimizing front end
> grip, as the rear seems to have too much now. I realize pressures are a
> black art and all this will change on Marina concrete. Here's my setup:
>
> F 225/45/17 on 17x7.5" rims
> R 245/45/17 on 17x8.5" rims (Kumho doesn't make a 40, didn't get 255/40 for
> fear of massive understeer)
>
> Peter Thana
> (not any faster, just running out of excuses)
>
> > -----Original Message-----
> > From: Kelly, Katie [SMTP:kkelly@spss.com]
> > Sent: Wednesday, October 04, 2000 4:17 PM
> > To: 'Andy McKee'; ba-autox@autox.team.net
> > Subject: RE: '00 Slush Series Schedule
> >
> > Andy "the Dynamo" McKee writes...
> >
> > > Not that I am one to comment about spinning in other people's
> > > cars, as I seem
> > > to have problems with immovable objects. But I was just
> > > wondering if there
> > > have been any incidences of Katie NOT spinning a co-drive.
> >
> > I didn't spin my mom's Lotus at the Divisional.
> >
> > I didn't spin James Creasy's Cobra.
> >
> > I didn't spin Suzie the 2zie (Cat's MR-2 Spyder).
> >
> > I didn't spin Arie's Golf.
> >
> > I didn't spin Josh's CM car.
> >
> > I didn't spin Sharon Levy's Audi... wait a minute.
> >
> > Time to change the subject.
> >
> > At least I didn't crash into anything.
> >
> > Later, bye.
> >
> > Katie
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