Bigger Chimeara Brake Upgrade using standard Ford parts?
Discussion
Has anyone tried a bigger brake upgrade for a standard 4.0 V8 Chim using standard Ford brake parts?
I would like to know what you can get away with using the standard brake caliper mounting brackets - NOT the pad mounting brackets which bolt to them.
REAR- I understand swapping from standard solid rear discs to vented 273mm discs is straight forward with a swop of caliper and disc. The discs are easily bought through Delphi and the calipers are standard Sierra 4x4 items or Sierra Cosworth items? Comment?
FRONT- here is the dilemna, I understand you can go from 240mm - 260mm discs no problem with a change of caliper? but what about the bigger discs from a Sierra 4x4 cosworth? what calipers do you need for those and do you need to change the caliper mounting brackets. I see there are 285mm discs and even bigger?
Has anyone tried to fit the Scorpio Cosworth calipers and what disc do they need, do they need a change of caliper mounting bracket? I think they run 60mm pistons in them?
Appreciate any suggestions and especially dimensions,
I would like to know what you can get away with using the standard brake caliper mounting brackets - NOT the pad mounting brackets which bolt to them.
REAR- I understand swapping from standard solid rear discs to vented 273mm discs is straight forward with a swop of caliper and disc. The discs are easily bought through Delphi and the calipers are standard Sierra 4x4 items or Sierra Cosworth items? Comment?
FRONT- here is the dilemna, I understand you can go from 240mm - 260mm discs no problem with a change of caliper? but what about the bigger discs from a Sierra 4x4 cosworth? what calipers do you need for those and do you need to change the caliper mounting brackets. I see there are 285mm discs and even bigger?
Has anyone tried to fit the Scorpio Cosworth calipers and what disc do they need, do they need a change of caliper mounting bracket? I think they run 60mm pistons in them?
Appreciate any suggestions and especially dimensions,
scotstuscan said:
Has anyone tried a bigger brake upgrade for a standard 4.0 V8 Chim using standard Ford brake parts?
I would like to know what you can get away with using the standard brake caliper mounting brackets - NOT the pad mounting brackets which bolt to them.
REAR- I understand swapping from standard solid rear discs to vented 273mm discs is straight forward with a swop of caliper and disc. The discs are easily bought through Delphi and the calipers are standard Sierra 4x4 items or Sierra Cosworth items? Comment?
FRONT- here is the dilemna, I understand you can go from 240mm - 260mm discs no problem with a change of caliper? but what about the bigger discs from a Sierra 4x4 cosworth? what calipers do you need for those and do you need to change the caliper mounting brackets. I see there are 285mm discs and even bigger?
Has anyone tried to fit the Scorpio Cosworth calipers and what disc do they need, do they need a change of caliper mounting bracket? I think they run 60mm pistons in them?
Appreciate any suggestions and especially dimensions,
You've essentially got it already. I have earlier this year upgraded from 260 to 283mm disc using the Escort Cossie or Sierra 4x4 Cossie front calipers. Scorpio 24V calipers are also the same. I have also read that Mondeo ST24 calipers are the same, but I cant be certain of that.I would like to know what you can get away with using the standard brake caliper mounting brackets - NOT the pad mounting brackets which bolt to them.
REAR- I understand swapping from standard solid rear discs to vented 273mm discs is straight forward with a swop of caliper and disc. The discs are easily bought through Delphi and the calipers are standard Sierra 4x4 items or Sierra Cosworth items? Comment?
FRONT- here is the dilemna, I understand you can go from 240mm - 260mm discs no problem with a change of caliper? but what about the bigger discs from a Sierra 4x4 cosworth? what calipers do you need for those and do you need to change the caliper mounting brackets. I see there are 285mm discs and even bigger?
Has anyone tried to fit the Scorpio Cosworth calipers and what disc do they need, do they need a change of caliper mounting bracket? I think they run 60mm pistons in them?
Appreciate any suggestions and especially dimensions,
Fitting is fairly straight forward but you need to relieve the caliper carriers slightly as the 4x4 caliper mounts were designed for the 4x4 disc which is a 278mm dia unit. You will need to use RWD (2 wheel drive) Sierra Cossie discs at 283mm to get the correct offset as the 4x4 discs have too much offset to them. You will only need to take 3mm or so off the caliper carrier. The brake lines attach in the same way as the smaller caliper so no need to worry about connection problems.
The last thing to do is to place a washer approx 1mm thick between the hub and the caliper carrier as this will then space the caliper centrally over the disc.
Ive done this conversion twice now. First time to my Cobra kit car where I went from a 240mm disc to the 283mm disc, and earlier this year with my Griff 500. Both times I have simply bolted the caliper carrier to the original hub, but I have also seen recently that someone has done this conversion and had to drill the threads out in the hub. I'm not sure if this was due to using the Mondeo calipers and carriers rather than the Cossie versions though.
As usual, dont forget to bleed the brakes through, and dont whatever you do, use silicone fluid as it damages the seals in the master cylinder and calipers. This stuff was in my Cobra brake system when I got it and I ended up having to renew all the rubber seals in the braking system - not good.
Hope this helps.
Cheers
Marty
Certainly agree with the above especially silicone brakefluid 
been there done that 
the rears are not just a matter of bigger vented discs and wider calipers you will need to source the correct wheel bearing carriers also as the ears are longer,I had some so called Cosworth breaker up north try to tell me the bearing carriers are all the same they are not the ears are further out by 10mm from solid to vented for rears he insisted different and tried telling me I was wrong t
t 
been there done that the rears are not just a matter of bigger vented discs and wider calipers you will need to source the correct wheel bearing carriers also as the ears are longer,I had some so called Cosworth breaker up north try to tell me the bearing carriers are all the same they are not the ears are further out by 10mm from solid to vented for rears he insisted different and tried telling me I was wrong tt Thanks Guys for all your advise, bitter experience I suspect.
FRONTS: I already have the Scorpio cosworth front calipers with carriers so they should go on with the spacer Marty V8 spoke of provided I get the 2wd Cossie brake 283mm discs. Not sure where the carriers need releiving but that should be obvious when you mate them up.
REARS: Any idea where to get these carriers from? Does anyone have the ford part number and approximate cost or could I go to a breakers? I assume there is only one rear disc, is it 278mm or something?
Appreciate any guidance here................
FRONTS: I already have the Scorpio cosworth front calipers with carriers so they should go on with the spacer Marty V8 spoke of provided I get the 2wd Cossie brake 283mm discs. Not sure where the carriers need releiving but that should be obvious when you mate them up.
REARS: Any idea where to get these carriers from? Does anyone have the ford part number and approximate cost or could I go to a breakers? I assume there is only one rear disc, is it 278mm or something?
Appreciate any guidance here................
SILICONE KID said:
I have the cossie set up but why are my front discs 278mm not 283mm.Purchased rear hubs from breakers 40 quid..I have 888 and 887 callipers purchased as a kit from Hansal..
The only thing I can think of is that you have 283mm discs with the correct offset but that have been turned down on a lathe to 278mm dia to save dressing back the caliper carriers to take the bigger discs. Original Cossie 4x4 278mm discs wont fit due to the diference in offset. The piccie attached shows the offset you should have. If they were bought as a kit and you have already got them to fit then I guess that you have machined 283 discs.
scotstuscan said:
Thanks Guys for all your advise, bitter experience I suspect.
FRONTS: I already have the Scorpio cosworth front calipers with carriers so they should go on with the spacer Marty V8 spoke of provided I get the 2wd Cossie brake 283mm discs. Not sure where the carriers need releiving but that should be obvious when you mate them up.
REARS: Any idea where to get these carriers from? Does anyone have the ford part number and approximate cost or could I go to a breakers? I assume there is only one rear disc, is it 278mm or something?
Appreciate any guidance here................
If you look at the carrier to the rear in the tray on the attached photo, the bits that need the work are the diagonally sloping parts facing upwards (hope that actually makes sense). The inner face of these 'wedges' needs to be dressed back so that the carrier fits over a 283mm disc rather than the 278mm disc that it was made for. The difference in diameters is 5mm, so you only need to remove 2.5 to 3.0mm thickness from each of these 'wedges' to get the carriers to fit.FRONTS: I already have the Scorpio cosworth front calipers with carriers so they should go on with the spacer Marty V8 spoke of provided I get the 2wd Cossie brake 283mm discs. Not sure where the carriers need releiving but that should be obvious when you mate them up.
REARS: Any idea where to get these carriers from? Does anyone have the ford part number and approximate cost or could I go to a breakers? I assume there is only one rear disc, is it 278mm or something?
Appreciate any guidance here................
Do it in a couple of goes by taking off some metal and then fitting them on the hub to see what clearance you have got.
You can also see the 887 and 888 casting and the carrier casting I.D's
One more question - Can anyone tell me how to change out the bearing housings on the rear to allow me to fit the vented rear disc brake colipers?
I understand I need to change the calipers and pad carriers but also the bearing carrier/housing as the caliper mounting lugs are +/- 10mm longer? IS it a big job?
I understand I need to change the calipers and pad carriers but also the bearing carrier/housing as the caliper mounting lugs are +/- 10mm longer? IS it a big job?
SILICONE KID said:
I have the cossie set up but why are my front discs 278mm not 283mm.Purchased rear hubs from breakers 40 quid..I have 888 and 887 callipers purchased as a kit from Hansal..
278mm discs can be used (with 888/887 calipers) but require an 11mm spacer between caliper carrier and hub. Caliper carrier will be threaded 12mm so hub may have to be drilled out from 10mm and suitable high tensile bolts aquired dbv8 said:
Anyone recommend a supplier of the 283mm discs?
Is there any real benefit in fitting grooved, drilled, dimpled or combination of?
Got mine from hereIs there any real benefit in fitting grooved, drilled, dimpled or combination of?
I have gone for 283mm solid, I wanted grooved but couldn't justify spending the extra over smooth disks, although they do look better IMO.
peaktorque said:
dbv8 said:
Anyone recommend a supplier of the 283mm discs?
Is there any real benefit in fitting grooved, drilled, dimpled or combination of?
Got mine from hereIs there any real benefit in fitting grooved, drilled, dimpled or combination of?
I have gone for 283mm solid, I wanted grooved but couldn't justify spending the extra over smooth disks, although they do look better IMO.
ami right the correct part is number SG2536? Bargain!
|http://thumbsnap.com/PBM2GEXk[/url][url]
|http://thumbsnap.com/sQpMZEWG[/url][url]
|http://thumbsnap.com/VB0fktFS[/url]Marty V8 said:
The only thing I can think of is that you have 283mm discs with the correct offset but that have been turned down on a lathe to 278mm dia to save dressing back the caliper carriers to take the bigger discs. Original Cossie 4x4 278mm discs wont fit due to the diference in offset. The piccie attached shows the offset you should have. If they were bought as a kit and you have already got them to fit then I guess that you have machined 283 discs.
I have the 278 discs with larger spaces ,I`m going for the the 283mm discs..What size washers do I need and where do they fit ?Gassing Station | Chimaera | Top of Page | What's New | My Stuff