Hi

Just trying to get my set up correct so i can get self centering sorted for IVA.

I have the long arm on the top wishbone facing forwards, the top wishbone all the way back, bottom wishbone all the way back.

The position of the top mushroom i am unsure about, Also does this adjust the camber only or the caster aswell??

What position does it need to be in?

Finally:-

what camber figures and toe setting have you set yours too??

What tyre pressures are people setting too, I have 6J x 13 on front and 8j x 13 on the rear.

Thanks for your help and advice.

Stuart

Description I have a Luego Locost (fore - runner of the Velocity) - this pic shows the position of my mushrooms. You will find that even at the most extreme setting, your Camber will only just go to zero - it really needs to go to -1 or 2 degrees, but there isn't enough adjustment with the Sierra uprights, so just set them as near to neg camber as you can get (don't be tempted to leave out the locknut!). This equates to the adjuster being fully screwed in as in the photo.

Take no notice of the arrowed bolt - this was fitted as one of the requirements of my tester after failing the IVA. (I haven't heard of anyone else needing to do it).



[Edited on 12/6/11 by stevegough]

Thanks for your reply, i had trouble with self centering on the IVA and want to do everthing to get through next time.

Cheers

To answer the other points - toe in - I originally set mine at about 4 to 5 degrees - and the car was hard work. After driving it for a week or two (post IVA) I changed this to about 1.5 degrees toe - in which was much better.

The castor is pretty much set by the position of the welded brackets, wishbone lengths (long arm to front with top bone is correct) and can be adjusted slightly by rotating the mushroom, but then you will start to lose the all-important camber.

Tyre pressures - depends mainly on the weight of the car - you look to be a CEC in that its a Zetec in your photos? - The weight will be similar to mine - about 620 with a full tank ( no occupants) so about 18 psi seems to work well.

Good luck, Steve.

Thanks, i will check setting and see what i can get.

I have a duratec in it, weights 522kg (with out me and prob about half a tank of fuel...)

Forgot to ask did you drill and tap the ali boss when you put the small retaining bolt in? That was m plan?

Cheers

[Edited on 24/10/2006 by SJC]

Just to clear something up, you cannot adjust caster with the inserts, it will always be the same wherever you turn it. You can however adjust the camber by turning it. If you dont believe me, just look at it again, the top pivot will stay in the same place regardless. HTH Ray

quote:

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Originally posted by SJC
Thanks, i will check setting and see what i can get.

I have a duratec in it, weights 522kg (with out me and prob about half a tank of fuel...)

Forgot to ask did you drill and tap the ali boss when you put the small retaining bolt in? That was m plan?

Cheers

[Edited on 24/10/2006 by SJC]

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quote:

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Originally posted by ChippyJust to clear something up, you cannot adjust caster with the inserts, it will always be the same wherever you turn it. You can however adjust the camber by turning it. If you dont believe me, just look at it again, the top pivot will stay in the same place regardless. HTH Ray

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Caster is NOT changed with the off centre mushroom

BUT

Trail is changed which affects the self centre issue

Castor is measured by the angle of a line drawn from the centre of the top ball joint to the centre of the bottom ball joint.

As previously said this canīt be changed by moving the mushroom.


Stu

Some conflicting issues about adjustment, i am not sure so will take any advice.

I am just bothered about passing the IVA so I think i will give my self extra toe in so and a degree or two of camber. Hopefully this will help with self centering.

from all the pictures i have seen people are putting the joint in the mushroom in the closest position to the inside of the wheel, so i think i will keep it there and give it extra camber.

With regards to locking the mushroom in, i have nylocs on the bolts but the IVA tester want addition locking such as a roll pin through the cast upright and in to the mushroom.

Once passed i can re-set to a better position for driving, shame is that what i currently set it to, the car drives nice.

cheers
stu

quote:

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Originally posted by whitestu
Castor is measured by the angle of a line drawn from the centre of the top ball joint to the centre of the bottom ball joint.

As previously said this canīt be changed by moving the mushroom.


Stu

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quote:

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Originally posted by SJC
Hi

Just trying to get my set up correct so i can get self centering sorted for IVA.

the top wishbone all the way back, bottom wishbone all the way back.



Stuart

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Top wishbone as far back as you can (use spacing washers).
Bottom wishbone as far forwards as you can (ditto).
Mushroom rotated so the hole faces forwards (this gives trailing hub which helps stability and self centering (a bit) but does not alter the castor or KPI as noted as these are fixed by the ball joint positions which are fixed by the wishbone positions).
-0.5 deg of camber
1 deg of toe in
18-20 psi in your tyres

Bob's your unfortunately named Auntie...

EDIT: Simple Guide Linky

[Edited on 13/6/2011 by NeilP]

quote:

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Originally posted by NeilP
Top wishbone as far back as you can (use spacing washers).
Bottom wishbone as far forwards as you can (ditto).
Mushroom rotated so the hole faces forwards (this gives trailing hub which helps stability and self centering (a bit) but does not alter the castor or KPI as noted as these are fixed by the ball joint positions which are fixed by the wishbone positions).
-0.5 deg of camber
1 deg of toe in
18-20 psi in your tyres

Bob's your unfortunately named Auntie...

EDIT: Simple Guide Linky

[Edited on 13/6/2011 by NeilP]

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