Avoneer
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| posted on 14/12/04 at 07:22 PM |
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MK bones - book chassis?
Will normal MK bones fit on a standard book chassis, all be it with the brackets in slightly different places?
Cheers,
Pat...
No trees were killed in the sending of this message.
However a large number of electrons were terribly inconvenienced.
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James
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| posted on 15/12/04 at 09:42 AM |
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Snoopy,
I think Pat wants to use Sierra uprights though! So he's gotta use the Indy length ones.
Pat,
I'm pretty sure that other than the bush tubes being further apart the Indy wishbones would be ok for you- you'll just need to move the
rear 4 wishbone brackets back a bit! 
Just make sure you keep the 25° castor!
HTH,
James
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Avoneer
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| posted on 15/12/04 at 11:53 AM |
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Cheers James,
No problem moving the back brackets.
So the key is the 25 degree castor angle?
Basically, I've a book chassis, book bones and Sierra uprights.
So...I either need some cortina uprights, which is a bugger as I have just bought some new discs for the Sierra uprights, or some new bones for the
Sierra uprights.
Getting new bones allows me to go wide track though.
Just wanting to work out the cheapest options.
Cheers,
Pat...
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However a large number of electrons were terribly inconvenienced.
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indykid
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| posted on 15/12/04 at 12:15 PM |
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bugger me, 25 degree castor?
you sure about that james?
I thought 5 ish degrees was the norm
tom
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ludsonline
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| posted on 31/12/04 at 08:29 AM |
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Castor Angle
25º Castor seems a bit excessive. I would of thought between 4º and 6º would be ok for a road car.
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Northy
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| posted on 31/12/04 at 01:06 PM |
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Pat have you looked at Darren's site (GTS), there's all sorts of bones on there.
Did you buy those Cortina uprights from the guy I put you in touch with?
Cheers
Graham
Website under construction. Help greatfully received as I don't really know what I'm doing! 
"If a man says something in the woods and there are no women there, is he still wrong?"
Built 2L 8 Valve Vx Powered Avon
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britishtrident
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| posted on 31/12/04 at 02:10 PM |
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At least 5 degrees castor ---- 25 is silly most I can recall on any car is 11 degrees on the Hillan Limp
Another can of of very old worms
Using too much caster introduces many side-effects in the geometry using too little givse little or no self centring. Cars which have little weight
on the front wheels require more caster.
Caster angle you can use on a given suspension is closely related to the King Pin Inclination (KPI) -- as when the steering is turned he
combination of the two angles has a major effect on camber angle.
If the Caster angle is greater than the KPI by a few degrees it boosts the negative camber on the outside wheel in turns. This was really
noticeable on the imp front suspension which had a KPI of 7 degrees and Castor of 11 degrees.
Here are a few typical caster anglesof older models lifted from one of Fred Phuns excellent books.
73 Volvo 146 1.5
73 Capri 1.75
68 E Type 2
68 XJ6 2.25
72 TR6 2.5
73 MG Midget 3
72 GT6 3.5
72 Spitfire 4
70 914 "Poorsche" 6
73 911 Porsche 6.5
71 MGB 7
[Edited on 31/12/04 by britishtrident]
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James
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| posted on 31/12/04 at 03:28 PM |
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Balls!
Sorry everyone- typo there!
It's 25mm castor- not degrees. 22mm for Cortina and 25mm for Sierra IIRC.
Sorry!
James leaves the room, red faced...
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