Bob has it close to right. The alloy drums became standard on both the 1600
and the 2000 with the 1967.5 models. You can retrofit the steel drums with
no problem, but putting the alloy drums on can cause interference with the
backing plate. Prior to the 67.5 model, there were no torque struts. With
the 67.5, all had the torque strut. Also there was the change to the dual
master cylinder. Frames have some unique differences (reinforced and
weakened with the 68+ cars so that they will fold up properly in a head on
collision for example) but they should all interchange. The early 1500 may
be an exception because of the torque strut issue. The spring change in the
rear also occurred in the 67.5 model. The steering box changed some time
during the 69 model year, and the crossmember is different as a result.
All that I remember at first blush - I am sure that there is more.
Sid
>From: "The Belgian Roadster" <chriss@euregio.net>
>Reply-To: "The Belgian Roadster" <chriss@euregio.net>
>To: "R Haug" <haugchiro@moscow.com>, "Mick T" <mickth@hotmail.com>,
><datsun-roadsters@autox.team.net>
>Subject: Re: Roadster differences between years
>Date: Sat, 17 Feb 2001 15:36:23 +0100
>
>Hi all,
>I have a 69...still with steering worm !
>69 on license means perhaps produced in 68.
>
>Chris-The Belgian Roadster
>http://albums.photopoint.com/j/AlbumList?u=1424148&Auth=false
>
>-----Urspr|ngliche Nachricht-----
>Von: "R Haug" <haugchiro@moscow.com>
>An: "Mick T" <mickth@hotmail.com>; <datsun-roadsters@autox.team.net>
>Gesendet: Samstag, 17. Februar 2001 15:21
>Betreff: Re: Roadster differences between years
>
>
> > Mick T wrote:
> >
> > > Hello all,
> > > I'm researching the differences in roadsters, particularly in
>suspension,
> > > brakes, and differentials. Years 1966 to 1970. Also, is there a
>difference
> > > between the 1600's and the 2000's for these areas? I've found a
>few websites
> > > that go over the cosmetic differences, but not about the areas
>I've listed
> > > above. Does anyone know of such a site?
> >
> > Mick,
> > I do not know of a site, however the differences between these years
>is somewhat
> > straight forward.
> > All models had disc brakes front and drums for the rear.
> > 2000 came with the finned aluminum drums standard with less
>un-sprung weight.
> > 1600 came with the steel drums on the rear as standard.
> > The aluminum drums for the 2000 fit the 1600 with no
>modifications.
> >
> > There is a difference in the rear wheel brake cylinders. 3 sizes
>offered
> > 2000 --- 3/4 inch
>standard
> > 1600 --- 13/16
> > another option 11/16 I
>think that
> > this was harder to find?
> >
> > Differential gearing was: 3.89 for the 1600
> > 3.70 for the 2000
> >
> > Not sure about the front coil springs, however the weight was about
>the same
> > between the 2 engines.
> > Rear spring rates were a little different. I do not know the
>differences
> > exactly.
> > The Bob Sharp manual mentions that the 66 rear leaf spring was
>stiffer than 67
> > to 70.
> > The 66 springs were recommended for competition. Supposedly a
>bit better
> > than the actual
> > competition leaf springs offered by nissan as mentioned in
>the Bob Sharp
> > race prep manual.
> >
> > Frames are (or should be) the same.
> >
> > Steering boxes were changed is 69 I believe.
> > 66, 67 had worm drive steering boxes and a specific idler box.
> > Not exactly sure of 68
> > 69, 70 had reciprocating ball steering boxes with a different idler
>box than
> > above.
> >
> > Bob
> > 67.5
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