Pretty much what I thought, about the Hoosiers. Up here in VARAC land
(Eastern Canada) our vintage tire rules preclude our running radials of any
sort. They're allowed, but only in sizes that aren't actually manufactured,
so you could run radials if you could buy them, which you can't. Go figger.
The size, FYI, is based on aspect ratio of 70% or greater, tread width
(measured shoulder to shoulder, on the tire) of no more than that on the
450L-13 Dunlop, which is about 4.25", and R or higher speed rated.
So we have only one tire option, which is the Dunlop, because no other tire
manufactured in the world complies with our rule. The dunlops are fine
tires, although not very grippy, but I get a wee bit upset at a rule that
gives a defacto monopoly without stating that we have a spec tire. Just a
wee bit, though, because I can't deny that the Dunlop tire is the most
correct tire available for vintage racing today, since it came into
manufacture in 1963, and our cutoff date for cars is 1961.
Anyway, thanks for the feedback.
At 03:05 AM 1/1/97 -0500, you wrote:
>I have replaced the trunnions with alloy ones that have
>been machined for 2.5 degrees neg camber. Simple
>and very effective. Highly desirable on pretty much any
>radial.
>
>Actually I found that hoosiers worked pretty well on the same
>setup as slicks - 0 static camber.
>
>Mike
>
>-----Original Message-----
>From: Brian Evans <brian@uunet.ca>
>To: Deikis@aol.com <Deikis@aol.com>
>Cc: spridgets@autox.team.net <spridgets@autox.team.net>
>Date: Saturday, January 31, 1998 12:31 AM
>Subject: Re: Front Hubs
>
>
>>I set up my suspension with 3/8" of spacer under the shock, and negative
>>camber offset bushes in the upper trunnion ( at the end of the shock arm).
>>I have poly bushes, non offset, in the lower a-arm. This gave me a small
>>amount of negative camber (using Winners Circle springs, lowered a further
>>amount with about 3/8" spacers at the spring pan). This is good for Dunlop
>>biasply racing tires, whch want about 1 deg of negative camber. If you're
>>using radial tires, you probably want about 2 1/2 deg, which will be tough
>>to get without cutting and welding something (not really in the vintage
>>tradition, eh wot). I'd suspect that Hoosiers want about the same camber
>as
>>the Dunlops.
>>
>>Brian
>>
>>
>>>While I'm bothering you, another question: I plan to vintage race this
>car
>>>and have installed shim plates under the shocks to give me more negative
>>>camber. The plates look to be a but 3/8 thick. I used standard offset
>>>polyurethane upper bushings, but have a set of "negative camber offset"
>>>bushings as well. Should I use them, or will the spacers give me what I'm
>>>looking for. I don't want to be so knock-kneed on the track that my
>braking is
>>>compromised. Advice of any vintage racing sages out there?
>>>
>>>Thanks in advance.
>>>
>>>--John Deikis
>>>
>>>
>>>
>>
>
>
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