[DeTomaso] Stress-relieving Rims

Fri Aug 16 20:16:26 EDT 2013

Dear Stephen,
Heating magnesium causes outgasing which I would imagine wouldn't be
beneficial to your paint. More significant is the fact that there is too
much missing information to answer your question intelligently. It's like
asking how high is up? Do your wheels still have the original paint? If
they were repainted what kind of paint were your wheels painted with? How
long are you planning on subjecting your wheels to 375 degrees F, 1
nanosecond or 12 hours? How long ago were they painted? etc. There are
 many
pre existing conditions that you haven't qualified  and there are  many
variables involved in heating the wheels for the purpose of stress relief
that you haven't quantified , like how will you be heating them? slowly
(like 10 degrees an hour for 37 hours or from 72F to 375F in 30minutes. In
order to get a meaningful answer you need to provide  more specific
information.  You should also know the qualifications and expertise of
those  who you are expecting to answer questions on highly technical
subjects so you can determine if the information you are receiving is
credible. There are some very well educated people on this forum as well as
some naturally occurring geniuses,and some possess a combination of both
naturally occurring intellect and a plethora of formal education. There are
also some people who struggle with  conceptualizing the use of a hammer.
 Don't assume that you have found the Oracle of Delphi and all your
questions will be answered with a level of simplicity and accuracy that
will relieve you of the task of doing the work necessary to fully
understand  the answers to your questions. The answers are all here , you
just have to ask the right questions! :>)
P.S. I wouldn't know the answer to your question no matter how much
specific information you provided , except for the fact that I do know that
magnesium does out gas when heated.

On Fri, Aug 16, 2013 at 4:13 PM, Stephen Nelson <steve at snclocks.com> wrote:

> I saw the stress-relieving recommendation on this forum, did a search and
> did not manage to find an authoritative reference.  The last comment in
> this
> thread (the comment at the very bottom) seems to be quoted regularly:
> http://speedtalk.com/forum/viewtopic.php?f=19
> <http://speedtalk.com/forum/viewtopic.php?f=19&t=29299> &t=29299
>
>
>
> I have an e-mail off to Halibrand asking them if they have any comments.  I
> also called a PhD metallurgist and he commented that 375 seem very low to
> hope to have any impact.  He suggested contacting the manufacturer.  So,
> searched the web - I get the idea that Campy doesn't make auto rims today.
> But, found an interesting thread on a Ferrrarrit forum -
>
> http://www.ferrarichat.com/forum/other-italian/300517-new-campagnolo-wheels-
> being-made.html  discussing making new rims for the GR4 pantera from
> original molds.  The guy that was apparently making the rims is Cesare
> Magistrali.  They gave a link to his facebook page, so I have sent off a
> query on stress relieving.
>
>
>
> Will be interesting to see if either Halibrand or Cesare responds.
>
>
>
> Stephen Nelson
>
>
>
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>   _____
>
> From: michael at michaelshortt.com [mailto:michaelsavga at gmail.com]
> Sent: Friday, August 16, 2013 12:26 PM
> To: Stephen Nelson
> Cc: detomaso at poca.com
> Subject: Re: [DeTomaso] Stress-relieving Rims
>
>
>
> I know about stress relieving spoked wheels for bikes and M/C, have never
> heated a car rim/wheel to do that, do you have some
>
> written documentation that this works on magnesium?
>
>
>
> I'd love to read it.
>
>
>
> Thanks
>
>
>
> Michael Shortt
>
>
>
> On Fri, Aug 16, 2013 at 3:20 PM, Stephen Nelson <steve at snclocks.com>
> wrote:
>
> Will stress-relieving original Campy rims at 375 F damage the original
> paint?
>
>
>
> Stephen Nelson
>
>
>
> SNClocks.com <http://www.snclocks.com/>
>
> Click here to join one of our mailing lists Contact
> <http://fs19.formsite.com/kagforms/form675003155/index.html>  Lists
>
> Click here for our new
> <
> http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers/About-Steves-D
> <
> http://www.snclocks.com/TheRestofourWorld/Hammered-Dulcimers/About-Steves-D
> %0d%0aulcimers/19824807_4sHGgj#1558377542_LKmkrT7>
> ulcimers/19824807_4sHGgj#1558377542_LKmkrT7> Hammered Dulcimers galleries
>
> Click here for my new blog <http://www.perfectoldman.com/>  on finding
> happiness in retirement
>
>
>
>   _____
>
> From: MikeLDrew at aol.com [mailto:MikeLDrew at aol.com]
> Sent: Wednesday, July 03, 2013 3:36 PM
> To: steve at snclocks.com
> Cc: detomaso at poca.com
> Subject: Re: [DeTomaso] Rim Offsets
>
>
>
>
> In a message dated 7/3/13 9 29 36, steve at snclocks.com writes:
>
>
>
>
>
>
> Mike - thanks for the extensive comments.  I do plan to drive 5332 for a
> while, get used to it and see how it all hangs together.
>
> Right - scrub radius.  As I understand it, increasing scrub radius makes it
> easier to park the car but more sensitive to external forces acting on the
> tires when rolling down the highway - like uneven brake application.  Oh,
> and "excessive" scrub requires more steering effort when going down the
> road
> and increases the "feel" of the steering.
>
> In my feeble brain, if the inside of the rim is at the same place with both
> 7 and 8 inch wide rims,
>
>
> >>>...which it's not...
>
>
>
>
> > well, going to an 8 inch rim increases scrub radius by a quarter inch.
>  Of
> course, I don't know that inside edge of 7 and 8 inch rims are at the same
> point.  But, since you indicate that the 8 inch rims improve handling, I
> assume this means that the offset is increased a bit.  You indicate that
> increasing scrub radius improves handling - does that include reducing
> tramlining?  Or am I really just asking too nit-picky of questions?
>
>
> >>>You're absolutely asking too nit-picky of questions...but that's why we
> are all here.  We love this stuff! :>)
>
> The outside of the wheels is in the same place.  The 8-inch wide wheels are
> one inch wider on the inside.  If the tire size is the same (that is, you
> take a tire off the 7-inch wheel and put it on the 8-inch wheel), the
> center
> of the tire is moved inboard by 1/2 inch.  That makes a fair difference.
>
>
>
>
> > From your e-mail I conclude that a set of four 8 inch wide original rims
> is the way you would recommend for my situation - if the Coddingtons leave
> me feeling like I would want to make a change?
>
>
> >>>Yes, although it will be difficult to buy a set of four, 8-inch wheels.
> You might wind up buying two sets of 7s and 8s to get there, and then
> selling the 7s to some Mustang guy.  Alternately, the easy solution would
> be
> to just buy one set and put them on the car.
>
>
>
>
> > Which Coddingtons.  The gentleman who put them on told me that they were
> special, an early set with a flat center section instead of the dished
> shape
> of the later ones.  This apparently requires unusual lug nuts which are
> counter sunk.  I am speaking from my notes here, and will have to see what
> I
> can figure out when Passport drops it off this afternoon.
>
> See what you think.
> <
> http://www.provamo.com/Members/Registry/RegistryImages/RTHPNNU05332/RTHPNNU
> <
> http://www.provamo.com/Members/Registry/RegistryImages/RTHPNNU05332/RTHPNNU
> %0d%0a05332.asp>
> 05332.asp>  5332
>
>
> >>>That is a VERY nice-looking car!  I assumed you were speaking about
> Coddington's Campagnolo clones, as opposed to these, rather more generic
> (but very striking) wheels.
>
>
>
>
> >Looking at the pictures one more time, I will have to see how it drives
> and
> rides.  You are right - gads, good looking rims.
>
>
> >>>Yes, these look quite good indeed.  My earlier comment was that their
> current-production Campagnolo wheels are revolting to look at...but these
> are a completely different story.
>
> I think when you drive the car, you will quickly get used to it and enjoy
> it.  There's a lot to be said for having a lot of traction and feeling
> planted in the corners, rather than skating around as you would on
> old-school, low-tech tires.
>
> Mike (who skates around on old-school, low-tech tires....)
>
>
>
>
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> --
>
>
>
>
>
>
>
> Michael L. Shortt
> Savannah, Georgia
> www.michaelshortt.com
> michael at michaelshortt.com
> 912-232-9390
>
>
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