welshboy
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| posted on 9/1/07 at 03:19 PM |
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wishbone help please
hi everyone could anyone tell me if the mesurements for the wishbones in the book are right before i start making them and if not could someone sort
me out with the right ones please
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DIY Si
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| posted on 9/1/07 at 03:51 PM |
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The top bone is the "wrong" one. It doesn't give enough castor. You need to offset the top upright mounting by more. It's been
covered recently I think, so a quick search should reveal the details which I can't remember. Although an offset of 22mm rings a bell.
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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welshboy
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| posted on 9/1/07 at 04:16 PM |
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thanks for your reply i did have a quick look before posting question but ill have to have a better look! would anyone know where i could get plans if
i was to use sierra uprights cos the bones have to be made different dont they ?
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britishtrident
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| posted on 9/1/07 at 04:21 PM |
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Better to buy wishbones in rather than make them they are such a fiddle to make they least enjoyable job in the whole build.
If however do you decide to make them be aware apart from the caster issue the book jig design is inadequate and the book lower wishbone design is
deeply flawed.
This subject has been discussed many many times if you do a search you should find pictures of improved wishbone designs as supplied by the most
respected names in the Locost parts world.
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welshboy
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| posted on 9/1/07 at 05:24 PM |
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ok thanks im quite new to this so ill try to have a look thanks again and i dont know much about wishbones
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DIY Si
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| posted on 9/1/07 at 05:28 PM |
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May well be best to buy some then. As said, getting them right can be a PITA. They aren't overly expensive so if you're not sure, why
trust your life to some you've made? I reckon I could make a set, but as for getting them accurate and equal? That may well be another thing.
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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Mark Allanson
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| posted on 9/1/07 at 07:13 PM |
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Be careful which ones you buy (if you feel you have to), as some are awful in design and manufacture. 22mm is the correct setback for 5°30'
(which I used, but this can be considered an absolute minimum) on Cortina knuckles.
 
Rescued attachment Wisbone Modification.JPG
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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Peteff
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| posted on 9/1/07 at 08:59 PM |
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Too late for you now but
the easiest way is to make the wishbones to the book dimension but lean the front assembly back by an extra inch and adjust the fu tubes to fit in.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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welshboy
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| posted on 10/1/07 at 06:32 PM |
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ok thanks for the pic and thanks everyone for your help
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