fiestaturbo.com

[Jay]

Right,

Fitted my cossie fronts last week and stopping power was awesome..

Fitted my rs2000 rear disc setup today bled the system and now the pedel just goes to the floor.

It operates the brakes.. but not very well.. I know the standard master cylinder isnt supposed to be upto much good with rear discs... but is it REALLLY meant to be this bad?

If it is.. what master cylinder and servo do I need to use?

Cheers, Jay

[ianFRST]

well maybe now you will listen to every1 who said you need to upgrade the servo and mastercylinder

yes is really is that bad, even when changing the front, the larger pistons will need more force to push them, let alone having rear calipers instead of the little cylinders

[Jay]

no1 told me to change the master cylinder...

Do I use an escort one?

[Jay]

what master cylinder and servo do I use then?

Will an escort mk5/6 one fit? or do I need even bigger than that?

Do i need to get one from an escort with rear discs?

[Jay]

UP!!!

[paradox]

ive been reading a lot of simaller posts to this one lately because i will be runing cosworth fronts and focus rears in the near future.

the most i can grasp from it all is that you will need to fit a mk5 escort brake servo and master cylinder.

apperently though they need some adapting to fit into a mk3 fiesta its been mentioned that the holes in the mounting bracket need opening up and the rod on the master cylinder or the brake servo needs shortning by about an inch.

im unsure as to exactly what needs doing and how true the above is but i thought its better than no reply for you.

if you ever do find out exactly what needs doing would you be so kind as to let me know.

[Jay]

Cheers for that mate!

I'll get one frop a scrap yard soon.

Will PM You with What I had to do

[reisskahn]

well i just converted my fronts to the cossy setup and wasn't really happy with the brake pedal feel... so i can imagine it being pretty awful with disc and calipers at the back.

Anyway regarding the mk5 escort master cylinder & servo conversion i never got round to doing it on my own car yet as ive got other problems to sort out with it but heres some good info when i was looking into it. HTH

http://www.fiestaturbo.com/forums/viewtopic.php?t=39839

http://www.fiestaturbo.com/forums/viewt ... ight=pedal

http://www.fiestaturbo.com/forums/viewt ... t=#1253759

[paradox]

well i just converted my fronts to the cossy setup and wasn't really happy with the brake pedal feel... so i can imagine it being pretty awful with disc and calipers at the back.

Anyway regarding the mk5 escort master cylinder & servo conversion i never got round to doing it on my own car yet as ive got other problems to sort out with it but heres some good info when i was looking into it. HTH

http://www.fiestaturbo.com/forums/viewtopic.php?t=39839

http://www.fiestaturbo.com/forums/viewt ... ight=pedal

http://www.fiestaturbo.com/forums/viewt ... t=#1253759

theres some usefull information in those posts thanks for the links

can anyone confirm the exact amount the rod needs shortning is it deffinatly 20 mm ?

[Jay]

Cheers Reiss

Anyone know if the mk6 escort servo is the same as the mk5? or whether the mk6 one will fit?

[heeman10]

No chance you can have decent front brakes and discs on the rear of a Fiesta without the Escort master cylinder, you should know that by now You can expect hardly any braking with the standard master cylinder and a pedal that hits the floor - standard procedure

The Mk5 and Mk6 setups both fit AFAIK. I picked up a brand new Mk5 master cylinder for about £20 on eBay, and will be spraying the servo in the next few days

[Jay]

Sorted... There are loads of mk6 1.6 and 1.8's in my local scrappy so I'll go down and whip one off tomorrow

Cheers Guys!

[Jay]

Went and got this from the scrapyard today! Picked the lowest mileage escort I could find and as 56,000 miles, and overall the one that looked the best looked after I whipped it off and paid just £20

Thing is.... in the guides I've read... I apparently have to shorten the rod between 20-25mm to make the pedal sit at the right height?

How much do I have to shorten it by?

Another thing I'm concerned about is that if I shorten the rod... wont the travel of the master cylinder be affected meaning it wont be working to its full potential?

Cheers

[95 Fiesta SI]

would you need to upgrade the servo if you just had cossie brakes and braided hoses or is it the extra strain from running calipers at the back aswell that it wiould need upgrading. Just asking cause iam hoping to do cossie fronts on mine soon ?

[paradox]

would you need to upgrade the servo if you just had cossie brakes and braided hoses or is it the extra strain from running calipers at the back aswell that it wiould need upgrading. Just asking cause iam hoping to do cossie fronts on mine soon ?

with just cosworth fronts the standard master cylinder should be fine if its in good condition.

you will just have longer brake pedal travel than before

[jayrs]

i dont mean to pi$$ on anyones fire but take it from a guy (me) that has escort cossie disc and calipers on the front and rear disc and claipers on the back and still running the standard FRST servo and master cylinder with NO problems and full braking.

the brakes are better now than stadard, well the rears will never bee as good as drums (as they dont do much) but there spot on and i dont have any trouble.
i dunno why some of you lot are maybe it has something to do with the factory bias valves on the inner wing on the frst that makes it different to all your lots cars? i dunno but i sh it you not, my stadard servo and master cylinder is holding up and doing the job just as well now as it did before

[Jay]

hmmm... I dont have the factory bias valves on the inner wing... I've got the small ones on the master cylinder as fitted to mk3.5 and later.

[ianFRST]

and just to make it a bit more complicated, you need to make custom brake lines from the servo as the threads on rear lines of a fiesta are smaller than the escort

id also advice using a brake bias valve for the rears, so you can adjust the pressure to the back brakes. basically run 1 line from the servo, to the boas valve, then from the bias valve to a brake T piece, then run a line to each caliper from the t piece. this is how to get the best from using rear calipers

[Jay]

and just to make it a bit more complicated, you need to make custom brake lines from the servo as the threads on rear lines of a fiesta are smaller than the escort

Thats the beauty of using a mk6 servo

There the correct ones to use with the standard fiesta pipework

[jayrs]

well i do have a set of the factrory bias valve (non adjustable i belive) sat in the sat doing nothing...

as for the bigger and smaller pipes, its just the fittings, but then again ive seen some fiestas with the bigger fitting also...
best ting todo is get some brake line of any car and bend it to fit from the master cylinder to where ever they connect.

if ya wanted the factory valves i got mate give me a shout

[Jur]

i dont mean to pi$$ on anyones fire but take it from a guy (me) that has escort cossie disc and calipers on the front and rear disc and claipers on the back and still running the standard FRST servo and master cylinder with NO problems and full braking.

the brakes are better now than stadard, well the rears will never bee as good as drums (as they dont do much) but there spot on and i dont have any trouble.
i dunno why some of you lot are maybe it has something to do with the factory bias valves on the inner wing on the frst that makes it different to all your lots cars? i dunno but i sh it you not, my stadard servo and master cylinder is holding up and doing the job just as well now as it did before

Same here,

I have cossie fronts (with spaced mondeo V6 discs)
RS2000 rears
Biasvalves on the inner wing
standard brake servo and master cylinder

yes.. the pedal travel is slightly more (but that's just something to get used to )
yes .. the braking itself is spot on .. it's way more doseable and it's not all or nothing (pretty handy when driving on slippery/wet/icy roads. )

I can get my 4 wheels locked whislt braking without any hassle