Brian is correct. We have the same problem with Dunlops on heavier cars. You
must drift the car thru the corners if you want to keep the buildup off the
tires. regards, John
----- Original Message -----
From: Brian Evans <brian@uunet.ca>
To: <Gregory_Schulz@mil-elect-tool.com>; <vintage-race@autox.team.net>
Sent: Tuesday, November 09, 1999 1:33 PM
Subject: Re: Hoosier characteristics (bias)
> This may or may not be what you want to hear, but...you're probably not
> driving fast enough! Racing tires do tend to pick up rubber, but if you
> get to where you're cornering consistently with a reasonable slip angle on
> the tire, the build up won't build up, so to speak. The tires will start
> to show an even graining across the tread instead. The rears are probably
> better than the fronts now because you're spinning the inside rear coming
> out of corners.
>
> Another indication is that you've got 7 events on them and still have
> "healthy" tread. Many guys will be buying new tires before 7 events have
> gone by! So next year, you have a new goal - wear out your tires! Even a
> lower powered Spridget can still have quite respectable cornering speeds -
> just don't use the brake as much ;)
>
> Cheers, Brian
>
>
> At 01:42 PM 11/09/1999 -0500, Gregory_Schulz@mil-elect-tool.com wrote:
>
>
>
> >Well, the bugeye is just about ready for winter storage. My first year of
> >vintage racing with VSCDA up here in the Midwest was better than
expected: 7
> >events with no "dnf's" and only one "dns". I wasn't very fast running a
> >modestly
> >prepped 948, and I kept an open 4.22 rear in the car at every track. But
> >we got
> >what there was out of the car by season's end, had a blast living out a
> >childhood dream, met alot of good folks, and that adds up to a successful
> >season
> >for me.
> >
> >But, there's always something a (new) guy just doesn't get.
> >
> >I ran Hoosier A70-13 Street TD bias tires this year. I was pleased with
their
> >general on-track performance, but it was the condition of the tires after
the
> >race sessions that distressed me the most. It never failed that by the
time I
> >got back to the paddock I had a terrible build-up of rubber on the tread
> >surface. At Road America, where there are 3 brutally long straights,
vibration
> >was a definite problem. Even at shorter tracks with modest straights,
similar
> >unwelcomed vibration was a problem due to this build-up. It seemed that I
> >could
> >scuff most of it off the rears during a session, but the fronts never
really
> >cleaned up very well. In-between sessions a knife worked well for the
bigger
> >chunks, but that persistent layering...
> >
> >I looked at them last weekend as I carried them down to the basement:
complete
> >rings of this stuff go around the entire circumference of the tires in
erratic
> >thicknesses from 1/16 to over 1/8". I thought to myself 'these suckers
aren't
> >even round anymore'. They were brand new this spring and have healthy
tread. I
> >can't imagine anything I could do to them would be worthwhile. Do I need
to
> >rotate front to rear/rear to front between sessions next year (since the
rears
> >do clean-up a bit)?
> >Any thoughts from experienced Hoosier users?
> >
> >Thanks,
> >Greg
> >'58 A-H Bugeye #517
> >Cedarburg, WI
> >
>
> Brian Evans
> Director, Global Sales
> UUNET, An MCI WorldCom Company
>
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