Hi,
I have do some search but nothing is really clear.
I have a Golf 4 'Audi A3 caliper and it fits the rear bearing holder of the Sierra Disk version.
I have put all together in a model 3D and when I use the standard Sierra disk 10,2 mm solid with a diameter of 253 mm I see that the caliper piston is
halve the out of the disk.
The questions are:
- Witch disk you guys use for this setup?
- Do you need to change anything else?
Regards,
Cobra289
Don't know if you found this, but it may help:
Linky
James
The sierra RS500 had 273mm discs, which is what i've used to mate up with the rally design rear wilwood kit...
James
Hi,
The person on the link looks like it has a different problem.
Let me show my setup from a Golf Mk4
As you can see the steel bracket is different so the offset is not a problem but more the diameter of the disk.
I think that the 35 mm disk will fit.
Wilwood would be a totally different story but it can help if the disk diameter is the only difference and maintain the 35 mm wide.
Try brakesint.co.uk.
It lists (as far as I can tell) all the different brake discs available for a sierra, with the relevant dimensions, i.e. diameter.
HTH
James
I used those calipers, but mine was a custom upright. What format is the caliper model? and would you mind sharing it?
Cheers,
Alan
I think that the best option for this setup would be the disk from a Sierra Cosworth 86-90 2.0L
The disk has a diameter of 273 mm Height of 33 and a thickness of 10 mm
These information has been take from EBC site.
I think that "Cloudy" refers to these disk!
Alan B.
No problems with sharing the caliper it is the version SW2009 will suit you?
Regards,
Cobra289
does anyone have a set of calipers they could weigh for me?
Im curious 
Cheers
Do you ask for this type the VW/Audi A3?
Bathroom scale say under the 1.8 Kg, [not accurate measurement] but tomorrow I can check with an electronic scale.
This weight includes the bracket too.
Regards,
Cobra289
magic, will weigh my mazda ones when im home, may have to upgrade before ever fitting them 
I have weighed the Golf Mk4 caliper setup with a electronic scale to be more accurate.
At the other hand I have found the Sierra rear LARGE disk information and dimensions of the above mentioned 273 mm OD disk.
The dimensions are:
OD = 272.5 mm
Total Height = 33 mm
ID = 154.5 mm
Centering hole = 63.6 mm
Thickness = 10.3 mm
Thickness at the flange = 7 mm
4x Holes at PCD = 108 mm
The manufacturers part number are:
FORD 5022667
FORD 1 637 534
LUCAS DF2637
BOSCH 0 986 478 815
TEXTAR 98200 0378
TEXTAR 98200 0378 0 1
JURID 561377J
MINTEX MDC0639
MOPROD MBD3729
TRW DF2637
FERODO DDF388
BRADI 1.1726.5.4
DELPHI BG2537
VEGAZ VL477
BRAKE PARTS INC. 953570
N.AMERICA PARTS DISTN BD02190
057 BDC3729
I hope this help someone.
Regards,
Cobra289
Carlo,
I doubt the 272.5 discs are large enough. Looking at your model I'd say you need more than 20 mm on the diameter of the disc in order to get it
completely covered by the brake pad.
If you'd like to try; I've got the Cossie rear discs on my car, and it is currently taken apart. I'm not too far away from you (other
side of Rotterdam), so you're welcome to try.
Marcel
quote:
Originally posted by Mave
Carlo,
I doubt the 272.5 discs are large enough. Looking at your model I'd say you need more than 20 mm on the diameter of the disc in order to get it completely covered by the brake pad.
If you'd like to try; I've got the Cossie rear discs on my car, and it is currently taken apart. I'm not too far away from you (other side of Rotterdam), so you're welcome to try.
Marcel
Can anyone tell me what thread the caliper carrier bolts are on the Mk4 Golf? I've tried M10 in them to no avail, so what size are they? Thanks