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Author: Subject: Shock clearance through upper front wishbone....
cloudy

posted on 3/8/06 at 12:32 PM Reply With Quote
Shock clearance through upper front wishbone....

I'm sorry I keep having to ask questions, hopefully I will be able to start answering some soon!

Is my kingpin angle too great here? Or is something wrong with the mounts? I take it the shock should be able to point straight up and not tilt towards the back of car? (These have bushing not rosejoints so you cannot angle)




James





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nib1980

posted on 3/8/06 at 12:41 PM Reply With Quote
I'm not sure, but can i ask where you got those lower ball joints and what type they are please?
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cloudy

posted on 3/8/06 at 12:42 PM Reply With Quote
They came on ebay along with the top mounts + wishbones - so not sure





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nick205

posted on 3/8/06 at 12:55 PM Reply With Quote
bottom ball joint looks a Maxi one to me same as used by MK and others.
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John Bonnett

posted on 3/8/06 at 01:09 PM Reply With Quote
Please forgive me if this is a ridiculous suggestion but is your top wishbone upside down? I made mine from Ron Champion's book and they look simlar to yours and I think on mine the long tube of the top wishbone is at the back.
http://i93.photobucket.com/albums/l57/bonnett_2006/trialscarwishbonesMedium.jpg
John

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David Jenkins

posted on 3/8/06 at 01:21 PM Reply With Quote
Not sure which way is front and which is the back - the long arm of the top wishbone should go to the front, so that the top balljoint ends up behind the lower one (ideally, about 22mm behind, but this varies according to the maker).

Anyway - you don't need much clearance, as long as it doesn't actually touch at any point though the suspension travel... or is it actually touching?

David

[Edited on 3/8/06 by David Jenkins]






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MikeRJ

posted on 3/8/06 at 01:47 PM Reply With Quote
If they are "book" wishbones, then the top one needs to be offset by quite a bit to get the correct castor angle, and this does put the wishbone quite close to the shock.
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cloudy

posted on 3/8/06 at 02:07 PM Reply With Quote
OK, it does clear the top wishbone, I was just expecting it to be centered!

to flip the top wishbone would make the situation worse, maybe my castor is a little overboard - David what angle does setting the top joint 22mm behind the bottom give?


James





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David Jenkins

posted on 3/8/06 at 02:29 PM Reply With Quote
Can't remember! I know that it's enough to give self-centering steering with all other settings (toe-in, etc) totally normal.

David






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emsfactory

posted on 3/8/06 at 02:30 PM Reply With Quote
Setting it back gives a better caster angle which gives better self centering. If you go by book dimensions alone you will have very little self centering.

quote:
Originally posted by cloudy
OK, it does clear the top wishbone, I was just expecting it to be centered!

to flip the top wishbone would make the situation worse, maybe my castor is a little overboard - David what angle does setting the top joint 22mm behind the bottom give?


James

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John Bonnett

posted on 3/8/06 at 05:46 PM Reply With Quote
I think on mine the long tube of the top wishbone is at the back.

This is of course rubbish. An optical illusion given by the picture. I've just checked the car and the long tube is at the front and the clearance between spring and wishbone is tight.

My apologies for my mistake.

John

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