Had an idea for a brake upgrade a while back that id not seen on a sierra before, for my 24v saph, so I've been tinkering this week and it seems to be effective and much cheaper (and bigger) than cosworth ones.

Mondeo mk3 callipers with 300mm discs

Before…



After…

 

Been done to death on other motors but I'm pretty sure you are the first to do it on a sierra that's shown it fitted

 

Well I knew they had been fitted to fiestas pumas kas, I actually had them for my old mk2 mondeo, figured it wouldn't take to much to get them on. Havnt tried them out yet as the engine still isn't back in yet. But should be effective on a budget

 

No brackets needed on the front ran
You just need to drill out the lug holes to 12mm from the standard 10mm and fit them on

 

Good Idea.

ST170 discs?
Any spacers needed behind the disc?

 

Bolt them on
Away you go
It's as simple as that

 

You need a spacer between the hub and carrier and some longer high tensile bolts as the standard mondeo ones arnt long enough, the 2 spacers (one for each bolt) need to be 13.4mm thick

 

And the holes in the hub need to be bigger

 

I had a mk3 Mongayo year before last, scrapped it and had the calipers re-conned for about£100, spent another £100 on 300mm discs & pads then decided to shelve it all.

You rebuilt your 24v?

 

you sure? i've done the extact same thing on the fiesta about 3 years ago and they bolted directly onto the hub

and i've got a few spare sierra hubs knocking about and i tested them first to make sure they would fit

and they did

the only difference is that the hole in the hub where the brake caliper bracket bolts go through are 12mm and not 10mm and the heads on the bolts are 15mm and not 17mm

but if you get the calipers from a mondeo you will also want to keep the bolts so no dramas there

 

Yeah the offset of a sierra disc is different to a focus and fiesta and mondeo, ill get the wheel off when I get home and take another pic of the back of the disc

 

the mondeo has a 1.8mm different offset to the fiesta which is why you use the st170 discs

 

on a fiesta outside my house, if i could show you how they were fitted i would and measure all the offsets etc

the spacer on the wheel is because the offsets on the later fords is way way different to the earlier ones

bastard facebook links don't work

 

My pal has them on his mk3 Escort

 

There's an in depth Sierra specific guide to this on the FSOC.

 

I had a set of calipers lying around to fit my sapph, but they didn't fit inside the 15" cossie wheels. So I ended up selling them as I wasn't planning on changing the wheels for those brakes.

Marty fitted them to his 2.3 16v 4x4 1 or 2 years ago I believe. It should be somewhere on the FSOC forum, I remember as I provided him with the info about the spacers he would need between the hubs and the calipers.

 

That's exactly the thread I was thinking of....

Marc and Marty went to great trouble weighing up what spacers you would need depending if you were running 4x4 or rwd Sierra set up.