thesecondprize
|
| posted on 29/4/12 at 04:23 PM |
|
|
Cortina vs. Sierra uprights
Probably a dumbass question, but if I have front wishbones designed for Sierra uprights, but have a pair of Cortina uprights to hand, is it possible
to use them by reaming them to accept the Maxi lower balljoint?
Apologies if this appears to be a stupid question. 
Thanks,
Pete
[Edited on 29/4/12 by thesecondprize]
[Edited on 29/4/12 by thesecondprize]
|
|
|
|
|
jossey
|
| posted on 29/4/12 at 04:39 PM |
|
|
this will start some different answers i think but my thoughts.
Steering rack is going to be wrong length if you chamge it.
Given the geometry differences with the two uprights the wishbones wont just change over.
The sierra calipers are lighter
The sierra geometry is better on a kit than the cortina angles.
vented discs are cheaper for the sierra.
How are you planning on adjusting the differences in geometry?
I thought the maxi balljoint had been modified to a better angle than the standard maxi joint to work with cortina upright.
One good thing is the overall weight is better on cortina and MNR use them alot but swap the standard ones out to their race kit.
If you have wishbones and sierra uprights working ok. why the change? why not get better discs or willwood calipers and stick with what is working?
DJ
Thanks
David Johnson
Building my tiger avon slowly but surely.
|
|
|
Marcus
|
| posted on 29/4/12 at 04:49 PM |
|
|
The Maxi ball joints will fit out of the box, no reaming. I always thought the geometry was also better with the Cortina bits. The Sierra stuff was
always a bodge IMO.....
Marcus
Because kits are for girls!!
|
|
|
phelpsa
|
| posted on 29/4/12 at 04:54 PM |
|
|
quote:
Originally posted by Marcus
The Maxi ball joints will fit out of the box, no reaming. I always thought the geometry was also better with the Cortina bits. The Sierra stuff was
always a bodge IMO.....
Because of the strut adaptors used you can get better KPI and therefore a more favourable scrub radius with a sierra upright. The bearing-in-upright
arrangement is much nicer too.
|
|
|
thesecondprize
|
| posted on 29/4/12 at 05:21 PM |
|
|
So, in basic terms:
1. I have a chassis and wishbones designed for Sierra uprights
2. I have a set of Cortina uprights
Can I sensibly use the Cortina uprights - yes or no?
|
|
|
jossey
|
| posted on 29/4/12 at 05:28 PM |
|
|
yes change the wishbones and wishbone brackets (maybe) and your on your way.
OR stick with sierra bits which (I) think are better easier cheaper and lighter.
Thanks
David Johnson
Building my tiger avon slowly but surely.
|
|
|
thesecondprize
|
| posted on 29/4/12 at 05:57 PM |
|
|
So, in short, the answer is "no, not without changing your wishbones at the minimum"?
If somebody could please confirm this either way, that'd be great.
(I *think* this is what Jossey is getting at, but I'm not 100% certain.)
|
|
|
big-vee-twin
|
| posted on 29/4/12 at 07:17 PM |
|
|
If you want to use Cortina uprights you need to use the Cortina wishbones
Duratec Engine is fitted, MS2 Extra V3 is assembled and tested, engine running, car now built. IVA passed 26/02/2016
http://www.triangleltd.com
|
|
|
jossey
|
| posted on 29/4/12 at 07:32 PM |
|
|
Plus your wishbone brackets may need to he moved.......
Thanks
David Johnson
Building my tiger avon slowly but surely.
|
|
|
thesecondprize
|
| posted on 29/4/12 at 07:38 PM |
|
|
Excellent, thanks for your help.
(I'm reading that as Locost wishbones designed for Cortina uprights, opposed to ACTUAL Cortina wishbones though !!!)
|
|
|
jossey
|
| posted on 29/4/12 at 07:46 PM |
|
|
Check the wishbone measurements with the Haynes book or the ton champion book to see what the difference is.... Also the angle of the end of the
wishbone is different I think. I have some sierra uprights with calipers and new discs which I'll swap for same in cortina as I have a set of
each.
Thanks
David Johnson
Building my tiger avon slowly but surely.
|
|
|
