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Sierra GT DOHC brakes upgrade?

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Old Mar 28, 2011 | 06:58 PM
  #1  
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Smile Sierra GT DOHC brakes upgrade?

Hi fellas!!!
From a few days I am owner of perfect Sierra GT-with only 50k miles on the clock! From this moment I'm starting to upgrade the car- brakes first, then suspension and engine. The front discs are 240mm (no ABS), rear->drums. Can I use front callipers and supports from mondeo V6 pre 96'(278mm) with sierra cosworth discs-4x4 or 2wd, plus some washers or adaptor plate? I don't want to use 300mm discs, becаuse I intend to use 15" wheels. What type of callipers can I use at the rear whit cosworth vented discs? Hеre in Bulgaria, any cosworth is usable, impossible to find second hand cosy parts, eventually new(cosworth callipers) or second hand from some mondeo mk1,2,3
I would be grateful for any information and advice!
Thanks alot!
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Old Mar 29, 2011 | 12:17 PM
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You have several options, the xr4i(2.8) had 260mm front discs, as did the xr4x4 etc, the 2wd cossie 4 pots at 283mm fit under 15" wheels as they had 15" as standard.
You can use the cossie 2wd discs/calipers simply by tapping out the existing lug hole in the hub, it's already the right size for tapping as well, this is very commonly done.
tabetha
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Old Mar 29, 2011 | 07:17 PM
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Thanks!
But in Bulgaria havn't cossy parts in scrapy, only dead mondeos (and few v6)! Can I swap the callipers from them, whit some spacers between the knuckle and supports?
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Old Mar 29, 2011 | 07:30 PM
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On my sierra, I have scorpio cosworth calipers with 4x4 sierra cosworth discs. I think, or it might be the other way round lol cant remember, I have it written down somewhere. They are 278mm and fit under 15s.
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Old Mar 31, 2011 | 06:04 AM
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Is the same in mondeo mk1 v6?
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Old Mar 31, 2011 | 07:07 PM
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Originally Posted by luckyracing
Thanks!
But in Bulgaria havn't cossy parts in scrapy, only dead mondeos (and few v6)! Can I swap the callipers from them, whit some spacers between the knuckle and supports?
yes. you need

calibers from a facelift mondeo 97-00 and the disc from the same car.

then you have the 278mm brakes that you talk abaut.

you have to redrill the hubs to 12mm to fit the bolts and then put a 10-11mm spacer between the calibers and hubs.

here in denmark cosworth parts are not as easy to find as in UK.
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Old Apr 1, 2011 | 12:43 AM
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Sorry to hijack your thread but with regards to fitting mondeo brakes, is it possible to fit mk3 mondeo callipers with st170 discs (300mm) it's quite a common conversion on a mk2 mondeo and I already have all the parts as i used to have a mondeo which I was going to upgrade, but since sold the car
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Old Apr 1, 2011 | 02:15 PM
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Originally Posted by skinnarbi
Sorry to hijack your thread but with regards to fitting mondeo brakes, is it possible to fit mk3 mondeo callipers with st170 discs (300mm) it's quite a common conversion on a mk2 mondeo and I already have all the parts as i used to have a mondeo which I was going to upgrade, but since sold the car
yes.

on my trackcar i build

MK3 calibers.
scorpio 5x112 (granada you call it) hubs

cosworth 4x4 coilovers.

and mercedes w124 4,2 V8 293x25mm disc.
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Old Apr 1, 2011 | 06:56 PM
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Yeah but those merc discs are 5 stud, I already have ST170 focus discs and mondy calipers, just wondered if they fit
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Old Apr 1, 2011 | 11:03 PM
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Originally Posted by skinnarbi
Yeah but those merc discs are 5 stud, I already have ST170 focus discs and mondy calipers, just wondered if they fit
im sure theay do fit.

the scorpio mk1 drive 5 stud.
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Old Apr 3, 2011 | 10:27 PM
  #11  
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I take it I will need to have some spacers made for the carriers as the offset of the larger discs is smaller than the original brakes
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