[Shotimes] (OT) Michelin Pilot Sport Cups gone greasy
Zach Leahy
Zach Leahy <leahyz@gmail.com>
Tue, 10 May 2005 15:59:23 -0500
Oh yeah most likely they are in bad shape, but here is my thought:
1. Take tires that are old, and abuse... cost: Zero. Entertainment
value; good.
2. Throw away old tires and get new ones: Drive spirited, but aware
that you just spent 600 bucks on them. Cost: $600+ Entertainment
value: good.
So, there you have it, six of one, half dozen of the other. I'll keep
stompin on these (the few times I get to use them) and when they die,
then I'll get some more.
Z
On 5/10/05, Ron Porter <ronporter@prodigy.net> wrote:
> Just based on age, any R-1s out there are only good for boat bumpers on a
> dock.
>
> Ron Porter
>
> -----Original Message-----
> From: shotimes-admin@autox.team.net [mailto:shotimes-admin@autox.team.net]
> On Behalf Of Zach Leahy
> Sent: Tuesday, May 10, 2005 4:05 PM
> To: Ron Porter
> Cc: Shotimes
> Subject: Re: [Shotimes] (OT) Michelin Pilot Sport Cups gone greasy
>
> Good to see Michelin has good customer service on these. I have a set
> of BFG R1's (the originals) that have the "Groove of Doom" setting in.
> basically there is a groove that vears out a little outside of the
> center of the tire, and almost everyone eventually experiences this.
> Anyway, whaen I talked to some folks about them, they all seemed to
> say they knew nothing about the phenomenon. I still have them, I used
> them for auto-x, but I have changed classes now so I guess I will have
> to take them to the track at the convention and wear them out. They
> are pretty old anyway, so they probablty are about shot and dried out,
> but I might as well kill em off right? :)
>
> Z
>
> On 5/10/05, Ron Porter <ronporter@prodigy.net> wrote:
> > FYI, for the track folks mostly....
> >
> > Rick asked a question about the Michelin Pilot Sport Cup (MPSC) tires,
> then
> > after a long thread, he called Michelin and got the answer in the lower
> > post.
> >
> > Ron Porter
> >
> > -----Original Message-----
> > From: Richard Betterley [mailto:rbetterley@betterley.com] On Behalf Of
> > rick_betterley@rennlist.net
> > Sent: Thursday, May 05, 2005 1:28 PM
> > To: 911/993/996
> > Subject: Michelin Pilot Sport Cups gone greasy
> >
> > Looking for experience with MPSCs (used for DE events on my '84 Carrera).
> > I have put 45 heat cycles (about 12 months) on my MPSCs; my first time
> using
> > them. Not knocked out by their grip (previous tires were Hosier SO3s,
> > before they had the 04 problems), but acceptable if I get a lot of wear
> out
> > of them.
> > They were fine until about 35 cycles or so, but really went greasy right
> > away at New Hampshire this week (previous event at Lime Rock, they were
> > fine). Pressures were same as at Lime Rock, both cold (25/26) and hot
> > (32-33). Lime Rock was sunnier and somewhat warmer, but I don't think the
> > lack of a sunny day makes enough difference for what I was experiencing;
> > lots more sliding around, although not terminal by any stretch (kind of
> fun,
> > actually).
> > Tread still is good (such as it is for a DE tire), worn on outside half,
> > much less wear on inside.
> > Camber settings are maxed out as far as can be with factory suspension
> bits.
> > So, what are others experiencing in terms of heat cycles? I hear reports
> of
> > 50-60, so I am getting there, but wonder if I can expect 60, or is my '35
> > then you start sliding' experience typical.
> > Thanks; still wondering whether I go back to the Hoosiers. How are they
> > wearing?
> >
> > Rick Betterley
> >
> > Had a very fruitful exchange of info with Michelin re my Sport Cups going
> > greasy after 35 heat cycles.
> > Here is what I have learned:
> > 1) Michelin is very responsive to requests for info and advice; good
> follow
> > up and knowledge
> > 2) More than 35 heat cycles is expected; they didn't give me number I
> could
> > expect, but it sounds like it should be well in excess of 35 They asked me
> > to run the existing tires at next event (Monday next at Watkins Glen with
> > Todd and Tracquest) and then call them to discuss results, since going
> > greasy after 35 cycles was apparently unusual.
> > 3) Negative camber 1.3-3.0 is ideal (pretty wide range)
> > 4) Cold hot pressures should be 25/26 or so, hot 32-33, which I have been
> > using (at least on a 1984 911)
> > 5) Tire temps should be 160-220 hot; I need to borrow a pyrometer to test
> > this.
> > 6) Flipping tires is not recommended, due to their asymmetricallity.
> > Hope this helps anyone else using these tires.
> >
> > Rick Betterley
> > Rennlist and PCA Northeast Region member
> > 1984 Carrera Coupe for the track (Guards Red #86)
> > 1986 Carrera Cabriolet for the street (also Guards Red) 2000 F350 Diesel
> > crew cab duallie (tow vehicle) and 2003 CargoPro enclosed trailer
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