Sorry, this will have been coverd before but a couple of searches havnt really told me much.
I started collecting bits for my car before the new book was available so I've got a set of Cortina uprights as well as a complete Sierra.
Many say the Sierra ones have nothing like as good a geometry as the Cortina ones & they're heavy too, but the Chris' book is all worked
out using the Sierra uprights.
I'm thinking I should use the Sierra ones to save having to redesign the wishbone geometry, or if I do go to the hassle of sorting the geometry I
should go ther whole hog & make my own uprights with as close to ideal geometry as possible.
Flawed as the Sierra upright may be people with far more knowledge than I have designed the chassis with it in mind so mabye I should stick with
it.
Anybody have any other ideas before I flog the Cortina ones?
I'd put the Cortina uprights on Ebay and then retire. People go nuts for em.
mnr/raceleda uprights for sierra which i think have slightly better geometry.also check the rally design ones which are very similiar and a fair bit
cheaper but only in cortina type
http://www.rallydesign.co.uk/catalog/product_info.php?cPath=1375_1594_1595&products_id=11815
also these but you would neeed to check fitment
http://www.rallydesign.co.uk/catalog/product_info.php?cPath=1375_1594_1595&products_id=13605
[Edited on 17/12/07 by higgsti]
Why not make your own...a man of your talents is bound to have loads of scrap steel lying about and a certain bloke you know well has a pair of fabricated ones on his class 3. I'm sure he'd let you measure/jig up from them. The rumour I heard about the Sierra ones is that they affect self-centreing, not sure if thats gospel though!!!
No disrespect Higgsti but knowing Mr Hillbillyracer....he'll be expecting to build a whole car for the price of one of those lovely ally Sierra
uprights.
now that would be locost
think cortina look better
unless your going for something like raceleda
practical issues with the cortina vs. sierra are that the discs are way easier to change in sierra uprights, plus the discs themselves are ventilated
and may be cheaper to get replacements for.. ok, they are fugly and heavy, but the brake caliper and pads are also more plentiful in supply and are
better than the cortina ones.... i decided to keep the sierra ones just because of this....
just think 5 years or more down the line, getting cortina brake discs and pads will be as expensive as the uprights are now....
Cortina geometry is totally wrong for a lightweight car anyway.
If anything the Sierra upright has better geometry.
Sierra brake calipers are also lighter and less trouble some than Cortina ones.
And of course Sierra parts are cheaper.
quote:
Originally posted by robertst
practical issues with the cortina vs. sierra are that the discs are way easier to change in sierra uprights, plus the discs themselves are ventilated and may be cheaper to get replacements for.. ok, they are fugly and heavy, but the brake caliper and pads are also more plentiful in supply and are better than the cortina ones.... i decided to keep the sierra ones just because of this....
just think 5 years or more down the line, getting cortina brake discs and pads will be as expensive as the uprights are now....
quote:
Originally posted by britishtrident
Cortina geometry is totally wrong for a lightweight car anyway.
If anything the Sierra upright has better geometry.
quote:
Originally posted by CaptainJosh
quote:
Originally posted by britishtrident
Cortina geometry is totally wrong for a lightweight car anyway.
If anything the Sierra upright has better geometry.
May I ask why you think this?
In reality though this doesn't really matter... IF your chassis is actually straight IF you have your wishbone geometry correct IF you've
attached the wishbones the the brackets correctly and IF you've got the steering rack in the right place it might matter a bit....... VERY few
cars are actually well built enough at the end of the day to have all the above so at the end of the day the best deciding criteria is what you have
or what you can get hold of easiest/cheapest. You can make a car with either Cortina or Sierra uprights handle extremely well so it's not worth
stressing or arguing over which is better
If you're building a Haynes Roadster you're better off using Sierra uprights as they're what the suspension's based around and
you're just making your life unduly complicated for no good reason if you don't 
quote:
Originally posted by grassracer
No disrespect Higgsti but knowing Mr Hillbillyracer....he'll be expecting to build a whole car for the price of one of those lovely ally Sierra uprights.
Cortina (and Escort) wheel bearing changes were a daily job at work. In the life span of the Sierra I changed...1.
adrian
quote:
Originally posted by adithorp
Cortina (and Escort) wheel bearing changes were a daily job at work. In the life span of the Sierra I changed...1.
adrian