britishtrident
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| posted on 23/9/14 at 06:24 AM |
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An eccentric bush will allow kpi and camber to be altered but not caster angle.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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motorcycle_mayhem
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| posted on 23/9/14 at 10:45 AM |
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There is, of course the cut down Escort/Capri option, used extensively on Sylva/Fisher/Raw things. Crudely welded tube on top, with a balljoint
screwed into that. Simple, cheap and I'm sure effective.
Scrub radius 'looks' better than the Cortina but then that may due to excess alcohol at the time of examination.
Raceleda made an alloy replicant of this arrangement, with what appears to be the balljoint just screwed into the top of the alloy upright. Again,
this may be due to excess alcohol, but I couldn't see this was a good thing. I've seen plenty of Raw things screaming around with this
set-up though, so it's clearly good.
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53Stix
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| posted on 4/4/20 at 10:31 AM |
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A relative forum newby tentatively re-igniting this thread as it appears to have some superb information, but unfortunately the majority of the links
now seem to be broken!
Nonetheless, I'm currently assessing options for the front uprights of my build and, as a complete noob to the world of 4-wheeled vehicles, was
looking for some advice please.
I think I'm arriving at either the Rally Design Cortina-geometry alloy
uprights, or the Caterham equivalents, both of
which appear to be relatively lightweight (which is a top priority) and widely used. However I have no data to back this up! Hence...
1. Is anyone able to provide a verifiable weight for either of these options? (Ideally excluding the disks & calipers)
2. The wheels I'm planning on using have a 4x101.6 (4”) mounting PCD. Do any off-the-shelf hubs accommodate this configuration? (details seem
frustratingly sparse)
3. Do the Caterham uprights accommodate the Wilwood Powerlite radially-mounted front calipers?
4. What options do I have for the upper and lower spherical bearings on these uprights? I’m trying to minimise weight as much as possible so would
prefer to steer clear of the larger automotive style balljoints (target vehicle weight is circa. 250kg, for context)
5. Probably the most important question - are there any other options that I should be considering?
Thanks in advance,
-Rob
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53Stix
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| posted on 4/4/20 at 10:39 AM |
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And just for reference, here's the Rally Design upright I modelled to gauge how all fits together... zero dimensional checks so 100% unreliable,
but it looks fairly close to the pics I've seen.
Can anyone spot the fatal error I've made?
 
Description
 
Description
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mtt mark
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| posted on 4/4/20 at 06:37 PM |
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Hub on back to front.
It will fit,.….…...smack, told you so
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ettore bugatti
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| posted on 5/4/20 at 01:25 PM |
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I would give the classic mini upright a look again.
You can buy aluminum versions of from KAD and/or Specialist components.
Bolt pattern is the same and there are upgrades for the brakes as well, 4 pots calipers and vented discs.
Maybe the balljoints are not ideal, because they need adjustment and maintenance.
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alfas
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| posted on 6/4/20 at 06:08 PM |
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https://www.hispecmotorsport.co.uk/uprights.html
the cheapest option and the leightest one are those cortina ones. why you insist on a 4" pcd?
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53Stix
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| posted on 6/4/20 at 09:14 PM |
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Thanks for the recommendation on Mini uprights. Will take a look.
Ref mounting PCD, I had my eye on a set of Supertrax 13x7's but have just found out that they aren't available in anything other than
4x101.6 PCD and -7 offset.... which kinda rules them out. Back to the drawing board!
In the meantime I modeled up a sort of custom design split-rim using a 4x108 PCD which seems like it would fit the bill...
 
Description
Please keep the upright suggestions coming :-)
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