According to a local spring shop, in order to replicate the original
spring rate, the "free arch dimension" is required. This would be the
arch of the spring as it sits free without any vehicle weight on it.
"In the old days" the individual leaves would be rerolled to this
dimension, then retempered in a furnace to achieve original performance.
Most modern shops no longer retemper, and therefore must over-roll past
the original free arch to an increased arch, which will then perform as
original when installed.
Is the "free arch dimension" of the rear springs available in any of the
technical resources?
What was original ride height, or more accurately, the axle centerline
to frame or body dimension?
Thanks in advance
Bill Murdock
-----Original Message-----
From: Mike Faggart [mailto:mikef@carolina.rr.com]
Sent: Wednesday, August 21, 2002 8:20 PM
To: datsunmike; Jim Cawrse; roundrocktom@yahoo.com;
datsun-roadsters@autox.team.net
Subject: Re: Flipped rear shackles....sort of a long explanation...
My black car is sagging, springs have no bow in them and the rear end
is
really low.
mike faggart
----- Original Message -----
From: "datsunmike" <datsunmike@nyc.rr.com>
To: "Jim Cawrse" <nqrithjim@hotmail.com>; <roundrocktom@yahoo.com>;
<datsun-roadsters@autox.team.net>
Sent: Wednesday, August 21, 2002 7:23 PM
Subject: Re: Flipped rear shackles....sort of a long explanation...
> I have heard from several sources that the rear springs almost never
sag
> because there's no weight back there. Mine are original and my car
looks
> like the same height as in test pictures of the cars from the 60s.
>
> Mike
>
> ----- Original Message -----
> From: "Jim Cawrse" <nqrithjim@hotmail.com>
> To: <roundrocktom@yahoo.com>; <datsun-roadsters@autox.team.net>
> Sent: Wednesday, August 21, 2002 2:32 PM
> Subject: Re: Flipped rear shackles....sort of a long explanation...
>
>
> > Tom,
> > Interesting question. When my two roadsters were
> > given to me (an early 67, and a 67.5, the
> > 67 which is now many years and many thousands of
> > dollars later the much enjoyed SAKE RKT), I noticed
> > that the 67.5 had the shackles in the typical
> > "American" position, the springs at the bottom.
> > I initially thought someone had flipped the shackles
> > on the car I had decided to keep IOT lower it.
> > After seeing some other roadsters, it seems the
> > reverse was true.
> >
> > Bottom line, even with the rear springs showing some
> > reverse arch, the "american position, flipped to the
> > high side" car sat a lot higher in the back.
> >
> > My car, with shackles in the factory position,
> > has springs that show about no arch at all,
> > probably the result of 35 years of sag. Thats
> > OK, because they lower the car nicely, and fit
> > well with my fronts, which I have lowered 1.5 inches.
> >
> >
> > >From: thomas walter <roundrocktom@yahoo.com>
> > >Reply-To: thomas walter <roundrocktom@yahoo.com>
> > >To: datsun-roadsters@autox.team.net
> > >Subject: Flipped rear shackles....
> > >Date: Wed, 21 Aug 2002 09:28:28 -0700 (PDT)
> > >MIME-Version: 1.0
> > >Received: from [207.173.21.42] by hotmail.com (3.2) with ESMTP id
> > >MHotMailBF2D1E5300344136E817CFAD152A06391; Wed, 21 Aug 2002
> 10:53:05 -0700
> > >Received: (from majordom@localhost)by teamfat2.dsl.aros.net
> (8.11.0/8.11.0)
> > >id g7LGSjd06988for datsun-roadsters-actors; Wed, 21 Aug 2002
> 10:28:45 -0600
> > >(MDT)
> > >From datsun-roadsters-owner@autox.team.net Wed, 21 Aug 2002
> 10:54:34 -0700
> > >Message-ID: <20020821162828.4283.qmail@web13505.mail.yahoo.com>
> > >Sender: owner-datsun-roadsters@autox.team.net
> > >Precedence: bulk
> > >
> > >Odd question, but normally the rear springs are ABOVE
> > >the rear shackle pivot point.
> > >
> > >I noticed the '66 has the shackle flipped the wrong
> > >way, leaving a negative arch in the rear springs. Just
> > >wondering if that negative arch (due to binding of the
> > >spring) ends up LOWERING the roadster? Seems odd, but
> > >most likely I need to get the springs rearched...
> > >
> > >Thanks,
> > >
> > >Tom Walter
> > >Cedar Park (Austin), TX
> > >HotJobs - Search Thousands of New Jobs
> > >http://www.hotjobs.com
> > >
> > >/// datsun-roadsters@autox.team.net mailing list
> > >/// Send admin requests to majordomo@autox.team.net or go to
> > >/// http://www.team.net/cgi-bin/majorcool
> > >/// Send list postings to datsun-roadsters@autox.team.net
> > >
> >
> >
> >
> >
> > _________________________________________________________________
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> >
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