vroooom ptssssh

Any difference in size?

Think mine needs a rear cylinder as pedle isnt firm and sinks to the floor with car off or running.

got braded lines all round aswell, how much would braded lines be from the master cylinder-calipers/cylinders be?

Also, if I was to get rid of the rear load sensor valve, what woul di replace with apart from a bias valve, im sure the twins got inline valves or something?

Plan on upgrading to braded lines from Mk5 RS2000/130ps master cylinder, cossie discs and S2 calipers

JesseT

The size of the rear cylinders varied from year to year. I'd just go with the largest ones as the bias is usually far too much to the front. Of course I have no idea what brakes you have....

vroooom ptssssh

Ive got standard S1 brake setup

What model/year did the largest cylinders come from? and these are the ones to get? drums the same size too?

Im assuming it's the cylinders or one that's gone too, car doesnt move much so i'd guess on it being them!

shane

To answer ur first post i think the s2's rear discs were larger!

addiction

s2's didnt have rear disk's and s2's used the same drums as an escort van which are much bigger than s1/mk3 drums and the rear wheel cylinders were bigger too. if the wheel cylinder's have gone you will find brake fluid leaking into the drums and even dripping onto the floor.

vroooom ptssssh

Yea will need to check for brake fluid, cant work out why else apart from a leak the pedal would just go to the floor. . hmm

so to upgrade the rear brakes you need the backplates/shoes etc basically all the parts to go with it, or is it jus a case of swapping the drums?

rst_cabby

XR3I & RS TURBO have different size rear drums - xr are 8" & turbo are 9" on series 2 - so i would imagine the series 1 rear drums are 8" - you would need rear back plates, new shoes,new cylinders & new fitting kit - can get real cheap at a motor factors like partco......

Hope this helps........

JesseT

19.05mm diameter is the one one want unless you want to use 20.xx or 22.22 cylinders from other Fords.
The 19.05mm was used in pretty much all 1.6 Escorts 80-90.

vroooom ptssssh

cheers lads good help

Andy_R

iTrader: (3)

Dave a Brake Proportioning valve(click) can be used if you plan on replacing the rear load sensor valve.

vroomtshh

And for the braided hose and fittings you're looking around Ł130

vroooom ptssssh

Andy_R, cheers andy will have a red on that! Im sure the twins when restoring their underside placed a valve either side at the rear from ford, will need to ask!

vroomtshh, dingy that then, can get copper ones for free cheers for the info tho

shane

I actualy meant to write drums!

PeterD

Dave im pretty sure mk3 turbo brakes are the same spec as the xr3i of the year, why not buy i fooked rs2k and swap the lot over?

vroooom ptssssh

Lucid, Thats just too much work

S2 brakes with cossie discs will be cheep and cheerfull and easier to get hold of i'd assume


Might be able to gt sierra xr4x4 stuff, dunno if it'll be any use but. . .we'll see

JesseT

S1 don't have load sensor valves as the S2 does.

vroooom ptssssh

JesseT, what do they use instead?

does that mean it'd be easier to convert to rear disc set up without the rear locking up problems?

JesseT

Not sure what difference it does in practice though. Perhaps not that much really. S1 as XR3i has restricting valves for the rear brakes in the engine bay, but they operate based on decceleration. The more a car decellerates, the more the pressure is restricted.

S2 has restricting valves bolted next to the rear suspension arms and these restrict the pressure when the arms are moving down . This of course happens when the rear end lifts up under braking and gets light.

So they more or less do the same thing, but are based in a completely different principle.

SafeChav

Jesse, the restrictors in the engine bay are fixed rate, its the valves on the later cars which restrict on deceleration.

Davvy, look on your passenger side inner wing and you will see 2 small cannisters, those are your fixed rate rear brake compensators, series 1's dont have load apportioning valves

vroooom ptssssh

Nice, Ive noticed them on S1's aswell and never even thought, I just assumed it ould have the load sensor ones at the back too

So what would be the plan if i wanted rear disc conversion, just out of interest, would i get different valves or are these ones fine on their own?

SafeChav

Never will you find a car with both unless someone has been silly enough to do a bit of DIY wrong.

If your doing the disc conversion just smash it on, they're all the same.

HOWEVER, as most find you will probably experience aswell, putting discs on the back makes the pedal very poor, being as you have a 22mm master cylinder.

There are a couple of people ive spoken to who claim to run a 22mm item and have a good pedal and i have no reason not to believe them, but the majority of people have the same problem as me and i currently have a 23mm.......so just don't overlook this

vroooom ptssssh

Im gonna be fitting the rs2000/130ps xr master cylinder, bigger than the s2, cant mind what mm it is tho, prob wont fit discs n calipers as its pretty pointless imo!

S2 calipers
cossie 2wd discs
spacer brackets
S2 rear set up
rs2K master cylinder
got braded lines already
hopefully get new plastic bush things for the brake pedal bar thing that goes along the bulkhead aswell as their penny's

is it worth getting a new servo?

SafeChav

What MS do the 130ps have then?

Any pictures? Would be handy as im on the look aswell

vroooom ptssssh

Nah no pics, will find out the size in a bit!

SafeChav

Sound, see if u can get a picture too!! Would be very useful, may even be able to help track you down one

vroooom ptssssh

Im waiting on a guy giving me a price for one, but if your price is better

also asked him for a pic, see what he comes up with!

DazC

iTrader: (1)

I don't need to claim! It's a fact!

JesseT

Sorry, they are not fixed rate. Ever wondered why they are mounted at an inclined position? It's because the operation is based on a ball inside trying to roll up the cylinder when decelleration to reduce pressure. Mounting the valves at a different angle will increase/decrease their effect.

SafeChav

I did say i have no reason not to believe you

JesseT, how does this principal work on later cars then like MK5 escorts, that have a tiny inline compensator screwed directly into the MS, and they are completely horizontal? I see what you are saying though...