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few more rear suspension geometry questions (with pics)

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Old 18-11-2009, 05:07 PM
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RSandy
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Default few more rear suspension geometry questions (with pics)

ok, measured strut to strut on a mates RST, and in comparison to mine, theres fuck all in it, so i think its safe to say my rear strut brace isnt causing an issue

upon closer inspection though and moving the car outside, its apparent its the passenger rear wheel with the issue, as now i can get at the drivers rear wheel easier, i can see the top of the wheel tucks in with increasing negative camber the lower the car goes

the problem wheel sticks out at the top, with a fair old wedge of positive camber, regardless of which lowering springs i use, which is worrying.

essentially the rear suspension is all standard set up, koni shocks and lowering springs, a rear disc conversion, and polybushes, rest is standard.

so...

any ideas what would cause the top of the wheel to be pushed out? the rotating mass isnt bent as it remains sticking out when rotated, no buckles etc.

we initially thought maybe my shock may be buggered possibly, so removed it and lowered the car down without. stil sits out at top edge, so not the shock kicking the wheel out, nor is it the turret and rear strut brace combination clearly as it remains bent without a shock

so now we are left with a trailing arm, and a hub, and a dimensional issue of some sort

are the trailing arms or rear hubs sided? i run base spec rear arms as i have no rear ARB, so as far as im aware, they arent sided. and i believe the hubs to be non sided also?

my impression of it is that possibly the stub section of the rear hub could be bent, resulting in the wheel to sit at the dodgy angle? but then maybe the trailing arm is bent and the reduced length could pull the bottom of the wheel in?

HELP!!!!!

Last edited by RSandy; 18-11-2009 at 08:29 PM.
Old 18-11-2009, 06:36 PM
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morph
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sounds like its come apart from the lower wishbone?
but also could be a bent hub or wheel bearing collapased

Last edited by morph; 18-11-2009 at 06:42 PM.
Old 18-11-2009, 07:26 PM
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RSandy
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wheel bearings are all new, and im guessing that wud result in the wheel wobbling about, it doesnt, it rotates fine, just with the top sticking out further than the bottom

iv measured my trailing arms, both are same length inner mounting point to outer, so there isnt a dimensional issue there i dont think

it seems to be pointing to a bent hub, or possibly a bent tie bar, altho bending a tie bar would be extremely difficult to do i guess?

this is confusing and annoying, and very stressful
Old 18-11-2009, 07:39 PM
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jonny s2
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have you any pics they may be helpfull,as nobody can see even tho you have described it
Old 18-11-2009, 07:52 PM
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RSandy
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not the best pic, but it gives a rough idea of how bad this wheel sits when on the deck, and how bad the positive camber is with the top sticking out:



spirit level bubble when placed across the rim:



safe to say this isnt right

just to add, this is sat on 40mm lowering springs with 2 coils butchered off them, and the other side displays the sort of negative camber u wud expect and sits at the expected level, just this side riding high and on the piss lol

Last edited by RSandy; 18-11-2009 at 07:54 PM.
Old 18-11-2009, 08:58 PM
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project rs
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as nothing is sided i'd swap the lot over and see what happens then, know this is a ball ache but will give good idea as to what is going on
Old 18-11-2009, 09:36 PM
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nigel b
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bent wishbone or the mounting holes in the shock are different

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Old 18-11-2009, 10:13 PM
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jonny s2
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have you said you have cut the springs?? this may be your problem
Old 18-11-2009, 10:53 PM
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Lloyd
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iirc, the 2 mounting holes for the rear shocks have lots of movement in them,
try loosening the bolts and pushing the hub inwards then retighten the bolts.
Old 19-11-2009, 04:28 PM
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springs i cut to prove a point, tried various height springs to see what happened to the camber on this wheel, as u can see, its still fucked no matter what lol

doubt its a dodgy shock as they were fine when removed, and havent been badly stored or anything. iv also removed the shock to see how the wheel can be manipulated, and it still wants to sit in positive camber regardless.

i think swapping the stuff over might be the best bet, altho im hopeful of blagging a set of rear end suspension bits to test fit, save stripping down the other side

with both rear arms sharing the same dimensions after a bit of measuring, its got to be the hub, or maybe the tie bar is twisted somehow n is forcing the hub down?

i hate these sort of problems
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