Now the European Gov has seen the light and decided to poison us all with
Benzine instead of lead, in the UK we no longer have a sourse of Leaded
Petrol.
Whilst Lead Replacement petrol will (probably) cope with the stresses of
ordinary motoring in the UK, does anyone out there have any experience of
"hard motoring" using unleaded on engines designed for lead. By hard
motoring I mean racing/fast road cruising at engine speeds of 4500rpm
plus.
The questions that I (and many others) would like answers to include
1. Which adddatives are people using abroad.
2. At what doesage rates
3. Does anyone have any experience of teh Redline addative?
If you have any input and would like to send replies to me, I will collate
them and reply to the list
thanks
Geraint Owen
Dr Geraint Owen
Department of Mechanical Engineering
University of Bath
Bath
BA2 7AY
tel 01225 826826 x4033
fax 01225 826928
email ensgwo@bath.ac.uk
On Tue, 9 Nov 1999, JOHN HARDEN wrote:
> 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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