givemethebighammer
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| posted on 22/8/04 at 10:13 PM |
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Excessive negative camber - a solution for those using the entire sierra rear end.
Several designs of seven (and other kits) utilise the entire (or most of it) rear end of the ford sierra. These include tiger cat, robin hood, leugo
velocity ? and many home brew designs. When installing the sierra rear end in a seven the ride height is much lower than in the original sierra and
the result is excessive negative camber of the rear wheels. The camber can be corrected but putting washers under the top two rear hub carrier bolt
but this tends to leave the bears open to the elements. A much better solution was designed by Jim Stott of http:\www.rhocar.org. This consisted of a
wedge shaped steel plate that fitted between the rear hub carrier and the suspension arm.
The wedge is 5.7mm thick at the top and 3mm at the bottom giving a 2 degree wedge.
real scale diagram attached.
RS Jigtec originally made and sold these these. Not sure how easy they would be to make, I got one of the last pairs before RS went under.
 
Rescued attachment camber wedges.jpg
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givemethebighammer
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| posted on 22/8/04 at 10:13 PM |
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original picture
 
Rescued attachment post-5-1060635347.jpg
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MikeRJ
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| posted on 23/8/04 at 06:32 AM |
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Ideally you would want to use two wedges per hub to keep the surface the the bolt head contacts flat, and therefore prevent bending the bolts as they
are tightened.
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givemethebighammer
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| posted on 23/8/04 at 04:33 PM |
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if you used two wedges per hub they would not correct the camber, just push your wheels out by 5.7mm each side !!
However, I can see your point. Not sure how much of a problem it is as loads of the robin hood gang have these fitted.
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JoelP
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| posted on 23/8/04 at 05:03 PM |
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it would be 8.7mm at each side! but would it be possible to put one wedge on the outside of the hub carrier, so that the carrier is at an angle but
the bolts still sit flat?
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givemethebighammer
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| posted on 23/8/04 at 05:38 PM |
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quote:
Originally posted by JoelP
it would be 8.7mm at each side! but would it be possible to put one wedge on the outside of the hub carrier, so that the carrier is at an angle but
the bolts still sit flat?
opps crap maths again
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JoelP
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| posted on 23/8/04 at 05:44 PM |
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(4000 posts here i come, a few months at this rate!)
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bob
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| posted on 23/8/04 at 07:18 PM |
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Just a wild stab in the dark but when you fit the hub with these wedges i presume you can still torque the bolts up to the hub carrier,or is just a
robin hood wing and a prayer thing
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givemethebighammer
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| posted on 23/8/04 at 08:04 PM |
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quote:
Originally posted by bob
Just a wild stab in the dark but when you fit the hub with these wedges i presume you can still torque the bolts up to the hub carrier,or is just a
robin hood wing and a prayer thing
Torque thing - don't see why not
RH thing - in general probably
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MikeRJ
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| posted on 23/8/04 at 09:12 PM |
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quote:
Originally posted by JoelP
it would be 8.7mm at each side! but would it be possible to put one wedge on the outside of the hub carrier, so that the carrier is at an angle but
the bolts still sit flat?
That exactly what I meant. It's only a few degrees, but torquing the bolts up with the head sitting on an angle is certainly not going to
improve the strength of the assembly.
We should be setting the RHers a good example
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Jon Bradbury
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| posted on 23/8/04 at 09:41 PM |
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Mike,
...so I presume you have another, better idea...?
(bearing in ming I'm building a 'Hood and Jim Stott is a sort of Demi-God in RH circles).
Go on, take your time...
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Hugh Jarce
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| posted on 26/8/04 at 06:30 AM |
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There are special adjustable 2 part washers for just this purpose. not to be confused with "hillside washers" which are just for bolting
against the tapered faces of I beams.
The pay isn't very good , but the work's hard.
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James
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| posted on 26/8/04 at 08:44 AM |
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quote:
Originally posted by Jon Bradbury
Mike,
...so I presume you have another, better idea...?
(bearing in ming I'm building a 'Hood and Jim Stott is a sort of Demi-God in RH circles).
Go on, take your time...
Yeah, ditching that whole, horrible, ugly, monstrously heavy system and fitting De Dion or IRS instead! 
James
[Edited on 26/8/04 by James]
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MikeRJ
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| posted on 26/8/04 at 12:41 PM |
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quote:
Originally posted by Jon Bradbury
Mike,
...so I presume you have another, better idea...?
(bearing in ming I'm building a 'Hood and Jim Stott is a sort of Demi-God in RH circles).
Go on, take your time...
As I already said, using two tapered shims per axle (one either side of flange) to keep the clamping surfaces parallel. Alternatively get the flange
spot faced at the appropriate angle with a milling machine.
Jim Stott may be a demi-god but a bolt head clamping onto a surface that isn't parallel is simply poor engineering parctice.
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