fiestaturbo.com

[MOONDUST FRST]

Whats the deal then, basically i got some rs2k items that need fitting as soon as i can but the only thing that is worrying me is the bias thingy
Ive heard that it will need a bias valve fitting to alter the braking proportions then ive also heard that it should be ok without
Also will i need a different master cylinder at all?

Thanks in advance

[xrsi]

i run rear disks without changing the bias valves that a mk3 has on the inner wing! they dont lock up or make the back step out so no need for me to use an extra bias valve!, im not saying every car will be the same tho.. but wouldnt of thought u would!

however you will need to uprate the servo as it is s**t with rear disks on! no feel at all!

get one from an escort and follow the guides that have been posted on how to fit them

[Stoned]

Yep as said follow get the Escort brake cylinder and servo to keep proper pedal feel. Will help your fronts greatly too as well

However after I put rear discs on mine I found the back stepping right out in wet conditions and one time I came out of a corner going backwards!

Worth testing them out in a carpark somewhere and adjusting them.

[Fiestasi-Andy]

I came out of a corner going backwards!

[Ka_Rst]

if you just leave the brake bias valves that are already on the back it will be fine, the brake servo will stop ok but it will feel a bit spongey

[Fiestasi-Andy]

if you just leave the brake bias valves that are already on the back it will be fine, the brake servo will stop ok but it will feel a bit spongey

will braided brakes line not help

[Ka_Rst]

nah ive got braided line on mine and i bled everything right up and the pedal doesnt really start working until you push it down about 2"'s

[MOONDUST FRST]

Why does fiiting rear calipers make the pedal feel spongy i cant see how

[MikeyXR2i]

Here goes, When you fit Bigger calipers on the front, you increase the bore size of the Piston, hence needing more fluid to push the piston out, but the standard master cylinder can cope with this.
But.... when you fit rear calipers, you now have 2 more calipers to fill up with fluid, as when it was standard with wheel cylinders in the drums, they only needed a squirt full to push the cylinders out, but now with the calipers more fluid is needed, and because the master cylinder is not big enough, you lose pedal pressure.

[Stoned]

As mikey says

When I fitted my rear discs I had no brakes at all until I fitted the Escort cylinder. I had to take the car off the road. That was using Mondeo V6 calipers on the front and Granada rear calipers

[Tazzie]

Hmzzzzzzzzzz fitted front and rear disks from RS2K and didn't swap te master cilinder and got good brake balance and feel in the paddle
Did i do something wrong then or got just lucky
I am driving it for about 6 months now and it still feels good even on track as i heat them up big time
The only sponge feeling i got was when they where new and i had to bed them in for the rest they are perfect and i am not ass lifting under heavy braking



greets Tazzie

[fiesta_fras]

interesting
, what master cylinder do u have? was the car orignally a turbo etc?

btw im guessing urs is LHD so has no bar?

[Excursion]

If you've got upgraded front brakes you need rear discs to get the best from the setup.

[Tazzie]

If have i Fiesta XR2I from 90 and the master cilinder is the standard one
I didn't upgraded it as i didn't upgrade the servo
I got 260mm front discs(RS2000) and at the rear i got the RS2000 rear break setup and it works fine
If you wanna find out what the car looks like take a look at the link below

http://www.fiestaturbo.com/phpBB/photog ... ery&u=5498


greets Tazzie

[Stoned]

Yeah I had a RS2k setup before and it was also fine, only a little bit of a squashy brake pedal.

But Mondeo calipers and granada rears are much larger and take a lot more fluid which is why the brakes dont work properly

[fiesta_fras]

could be the fact its LHD has no transfer bar

[Excursion]

Pedal travel is fine with the RS2K setup. The front pistons aren't much larger than standard so providing you've got good condition pads and dsics all round it's not too bad

[fiesta_fras]

what about with cossies fronts?

[Excursion]

what about with cossies fronts?

Bit soft mate, not ideal.

[chumkila]

Might have to changed mine too then. Lets see how it goes firsty hey.

[Excursion]

Might have to changed mine too then. Lets see how it goes firsty hey.

You got cossie fronts going on mate?

[chumkila]

ST170's 300mm. should be on this weekend if not in the coming week.

[Stoned]

The pedal will travel halfway down on those, but you wont need to change the brake cylinder unless you are going to upgrade the rears as well

[fiesta_fras]

are focus rear discs the same kind of piston?

[chumkila]

Not upgrading rears yet so should be all good then.

[MOONDUST FRST]

Hmm best bet will be to fit them then see how it goes from there methinks I got cossie fronts and RS2k rears so.......
If i need to upgrade the servo and cylinder which escort one do i use?

[Stoned]

I used one from a MK5 1.6 Zetec Escort. It has the same brake hose fittings.

[xrsi]

thats what i used mate!

mk6 1.6 one was the best looking one i found! had to change the master cylinder tho, the seals went so brakes jammed on!

stops really well now!

[Stoned]

mk6 1.6 one was the best looking one i found! had to change the master cylinder tho, the seals went so brakes jammed on!

Thats freaky!

Thats exact same thing happend to mine. £55 new from Motorfactors by the way in case anyone wanted to know

[xrsi]

tis well freaky!

prob because the car had sat in a scrap yard for a while and the seals had become solid and perished! and plus the fact they were having to do more work all of a sudden!

but my cylinder was cheaper than urs

[andyhardy]

I have same problem with my Turbo.

Get really spongey feel from pedal despite braided hoses - will be putting uprated master cylinder once funds allow (anybody wanna buy FRST parts off of me? )

Cheers,

Andy