master cylinder

[HandyAndy]

I,ll try & dig out the info , will get back to you ,

cheers
andy

[ozzy1]

Brakes International

http://www.brakeparts.co.uk/

[twinturbo]

Originally Posted by rapidtornado

can you remember where you got it from Andy? I need the same set-up as noted above (3 port) and I'm looking at £80+ for an m/c (all round discs) so will be getting that unless you can direct me to the 30 quid supplier

Cheers

All round disks on the sierra uses a 25MM Master Cylinder ( 3 port ) and you will be lucky to get one cheap.

You can probably use the standard disk/drum cylinder ( still 3 port ).

The reason for the bigger master cylinder is to produce more fluid in order to supply the calipers at the rear. Now, people that have upgraded to rear disks on the sierra have reported variably that it makes little difference to the pedal travel, or that there is some increased travel but it still works.

If you think about the above "Pedal travel" that "extra" can be dialled out by moveing the operating rod further from the pivot point ( so increasing travel ) This was not realy an option on the sierra as it would have required some reworking of the pedal assembly , so the cheaper option of a larger cylinder was used.

TT

[John.W]

I have just taken the m/c out of a Mk2 golf, it has four outlet points, 1 for each wheel station.

The 2 rear outlets go to a ballance junction at the back of the car and then split off to the wheels. The 2 front obviously go direct to the front wheel stations.

On the Golf that I race the ballance junction has been disconnected because it was designed for a car with seats and spare tyre and shopping and any other extra weight that you can think of.

I was thinking of using the golf m/c on the roadster but without the ballance jubnction, does anybody know if this will be suitable. I read in the book that the original car has direct brake lines to the wheel stations but only 1 brake line going to the rear and then being split at the rear axle.

I will be using discs on the front and drums on the back.

[twinturbo]

You could try 1 rear line and blank off the other, that's what the MK1 boys do when fitting MK2 16V Master Cylinders to their golfs.

TT

[John.W]

that might work but will it be acceptable for the man at SVA. Will it make a difference to the brake fluid pressure? I suppose if there is no ballance valve in the system the pressure should be eqaul anyway.

[flyerncle]

I think you will find a cylinder with four pipe outlet is for a split diagonal system,two circuits one from oposite corners ie n/s/r and o/s/f and n/s/f and o/s/r.

[John.W]

I have collected my donor now so I wil probably use the donor m/c but thanks for the help and info

[wylliezx9r]

I've got one going spare if u want it, it's a 3 port I've gone down the route of twin brake cylinders. 20 quid posted if you fancy it.