parkin92

Was wondering if anyone has tried it. Iv got this (see link) from fast ford website, but it's focus rears to mk4 fiesta

http://www.fastfordmag.co.uk/resourc...AF244.tool.pdf

Just to clarify, I'm wanting to take brakes from 2.0l/st170 focus and put them on my 1.8 focus, NOT A FIESTA!!!

m4tt274

iTrader: (2)

it effects the brake balance and ul find the back end locking up under hard braking.

Chopshop85

iTrader: (4)

Most of the time you have to bias down the rear brakes so they are no more effective as the drums otherwise, as said above, they will lock up under heavy breaking. Purely a cosmetic thing in most cases.

.Ross.

iTrader: (2)

Pretty good guide ... I done it to a MK6 Escort with ABS ..

No Brake problems ... Even with the ABS fuse pulled. Also the Hubs can be had for £20 at a scrappy ..

They forget to tell about the Tit on the pads ... Make sure it locates into the Cut-Outs on the piston. OR .. The pad will wear one side and scream like fook.

m4tt274

iTrader: (2)

the discs wont fade as badly as the drums but iirc the rear drums on a fiesta only do 10% or something like that so u wont notice, it is just cosmetic.

.Ross.

iTrader: (2)

Yeah well on a MK6 Escort it pushes the wheels out buy 25mm, Focus RS push the wheels out 33mm .. Maybe the same on the Fiesta?

matt17187

i've actually done this conversion myself about 7 years ago on my 1.8 focus, was surprised the difference it did actaully make, mainly just a firmer feel when braking, but have never manged to get the back end to lock up.
any yeah they look a little nicer than drums too

parkin92

I got a 2002 1.8 focus too, and thats what I'm looking to do the conversion on. where did u source parts/which donor car/how much £££?

parkin92

Will st170 rear setup fit or not?

focusv8

Yes, and it's better if you get the full disc handbrake cable as well.

parkin92

Just I'v got this focus 1.8/2.0l mod guide from http://www.fastfordmag.co.uk/resourc...244.modify.pdf

Not too sure what it's saying, coz in one bit it says that the st170 setup will "bolt straight on" and then it says that the standard 1.8/2.0l callipers are attatched to the hub so "bigger discs are not possible"

Could someone clear this up please?

matt1.8z

tht on about the fronts cant av bigger discs with sandard calipers and hud so need st170 hubs to let to fit bigger disc's

for fittin disc on the back to replace drums use this guide http://www.focusowners.com/forum/viewtopic.php?t=25538

matt

.Ross.

iTrader: (2)

Focus 2.0 16v and ST170 share the same Hub, Spindal and caliper. Only difference is the caliper carrier for the bigger disc.

Also the ST150 set up is the same as the Focus 2.0 16v Zetec. (255mm Disc)

The Focus RS shares the same caliper/carrier but the Spindal pushes the Hub out a further 8mm.

pdfbt40

It was a Ford authorised upgrade in Scandinavia (255mm). There's a full TSB on the TIS.

Minor point .Ross, the stone guard is different on the ST170 as well.

I've not noticed anyone mentioning the multiplicity of hoses and pipe arrangements. As Fords TSB, I've found the best is the after 2002 2.0l hose (long). Its even cheaper from Ford than a factors.

Martin

parkin92

So has anyone done the conversion and reconnected the ABS? As long as I can find donor parts from either 2.0l or st170 at a decent price and will be able to connect the ABS after the conversion I think I'll be doing it

Another thing, apparently if the car had ABS as standard, it must have it when it's MOT time too.

pdfbt40

Yes on all vehicles that had it already.

Often the sockets (filthy) for sensors are present even if ABS isn't fitted, but retrofittment of ABS is a job I don't know anyone attempting.

Yes, ABS light on is a MOT failure...simple cure though.

Martin

parkin92

ok so just to be clear on parts hear...
With st170 brake conversion (done to a 1.8 focus, rear drums),
REAR: Calipers, discs, hub, new/decent 2nd hand hoses.
FRONT: Calipers, discs, ST170 hub.

this setup will deffo fit all 17" alloys yes? just bought some new dezent motions (pics to follow when the council stop gritting the fooking roads) n would be devastated to find they don't fit.

pdfbt40

Rear: Callipers, ST170 calliper brackets, pads, ST170 discs, stub axles & hubs, ST170 stone guards, ABS sensors, hoses, hose brackets (or s/s cable ties), rear section handbrake cables, bolts.

Front: ST170 knuckle & hubs, ST170 discs, ST170 or Mondeo Mk3 callipers & calliper brackets, pads, bolts.

Any decent 17" alloys with a sensible offset will fit over. Spare has to be 16" minimum.

Martin

danny_248

So, if you get the bits from a car already with abs its a case of connecting this to the new car with abs. i.e. frp or zetec s. . .

and abs will be working. . . only thing that has me concerned about this conversion is my abs not working. . sad, i know, but, it'll only bug me. lol

.Ross.

iTrader: (2)

The ABS will only work if the cars share the same ABS system .. I.E .. Magnetic Collecter or Analog. They aint interchangble.

danny_248

oooohhhhh, ok....

hmmmm, did you get yours working mate?

So if i do the conversion i heard the mk6 escort abs sensor is the same as the pumu/fiesta connection but some machining required.

cheers

.Ross.

iTrader: (2)

On the Guide further down the forum.

Guide

Notice the ABS sensor is Black Plastic. (Pic # 8) Thats the Mag digital sensor, The MK6 escort uses an Analog system, Notched collector ring.

If your Car shares the same system as that Fiesta then its a simple swap. If not then you need to machine the hubs .

danny_248

Fair enough, a case of getting the right type of sensor then and machining if not. . will see how we get on in time. Cheers matey

.Ross.

iTrader: (2)

No bother.

Just have a look at the back of your drums. The Analog Sensor is bigger then the plastic one. Might save pulling it to bits.

danny_248

Indeed, will have a butch on tuesday when i do the 280mm front disk upgrade as am putting braided hoses on. This includes braided for the back (for when i do disc upgrade), so when i do this i will have a look

pdfbt40

AFAIK all Focus, as a completely new model, used current Ford technology.

I don't know of any Focus that used the older 'passive wheel speed sensor' and a toothed wheel (same technology as the crank and cam position sensors).

Obviously this change over is a problem on other longer life/earlier models such as the Mondeo. Different ABS controllers and sensors across the model range, even in the same MY.

[hr]danny_248, ST170 front disks are 300mm not 280mm.

What hoses are you fitting at the back (to drums)? The best scheme for a standard rear disc is a single 440mm hose (post 2002). It will work on a ST170 disc as well, though a bit tight on full travel. There are various hose/pipe/hose setups on earlier rear discs and also on the ST170/RS and having the right brackets and hoses can be great fun.

Martin

danny_248

Perhaps because i did mean 280mm (so they are 280, actually 278, not 300) front disk upgrade, they are from a 2.5 v6 mk2 mondeo. . . and there is also a 300mm option, but for this, to avoid machining the calipers, i am going for 280, (sorry if this seems a bit pushy)

danny_248

280mm not 300 as i am using the standard zetec s rims (you can see in avatar pic) ;0)

danny_248

Cheers, i will defo bear this in mind, thanks for the heads up ;0)

pdfbt40

Sorry, I must have missed the point where we moved from Focus to Fiesta or Escort?

So are those 15" wheels?

Will you need any spacing on the calliper/knuckle. The ST170/Mk3 Mondeo calliper onto a Mondeo Mk2, with ST170 300mm discs, needs (a well recorded) 3mm spacers.

Martin

danny_248

Indeed. A 3mm spacer is needed. Which I have, one step ahead. Lol ;0)

zammofocus

i want to do this to my focus but only got a 1.6 i wont be able to get st170 breaks put on will i

pdfbt40

You can fit the standard diesel/petrol rear discs or ST170 ones straight on your 1.6. The only difference is a few bits for the larger ST170 discs. Will even fit under 15" wheels.

Martin

zammofocus

so what will i need for the standard disks for the back plz and i have 18" wheels on mine

pdfbt40

Here are the components required to convert your rear drums to discs.

If you have ABS, the sensors are identical & can be reused.

1142082 Spindle RH
1138520 Spindle LH
1138512 Hub assy x 2
1069295 Ring - ABS sensing
1060129 Shield LH
1060130 Shield RH
1075553 Caliper assy RH, not including pads
1075554 Caliper assy LH, not including pads
1323621 Rear disc - USE ONLY IN PAIRS
1009262 4 off splash shield rivets @ 9p each (not really needed)
1148270 brake hose 440mm x 2
1107698 brake pads
1253159 handbrake cable

If you use new parts from Ford, that list will come to over £800.

Most people buy second hand from a dismantler and/or use 'pattern' parts from a factors.



You can get a copy of the Ford general instructions on this conversion from here:
TSB 102/2003 - General Instructions for Converting Vehicles with Drum Rear Brakes to Disc Rear Brakes

Couple of points I can remember.

1) You don't really need to rivet the splash shields on. Just convenient instead of holding them as you bolt on the hub.

2) The hose support bracket can be difficult as (especialy on 'older' vehicles) the arm bolts are corroded into the bushes. Cable ties instead? but check every 3 months as they do age and break...

Martin
E&OE