Whot Ho
I have bought a Mk1 Fiesta brake master cylinder to install on my MK.
Having removed the dust caps for the first time I find that it has three
Normal size (M10x 1mm) ports and one slightly larger port.
Does any one know how this cylinder was mounted on the Fiesta .
Which ports went to the front brakes and which to the back.
Also what went in the lager port? (Brake Light Switch?)
Ta
whoops
My master Cylinder appears to have gained a Lager Port!
Shame its only a Larger Port.
Oh well.
Pretty sure the larger port will be M12, uncle Henry seemed to have a habit of mixing port sizes on the m/c's. You'll have no trouble
finding M12 unions to fit these.
There seems to be no hard and fast rule as to which pair of brakes go to which ports, I did a fair bit of research on this and found examples of both
arrangements - I tried mine both ways, the brake bias seemed the same either way. I believe some m/c's are stepped bore though (i.e. different
bore between primary and secondary) obviously this would affect the bias.
Incidently I've now changed from a 22mm Sierra cylinder to a 17.5mm Fiesta jobbie and now have a much improved brake pedal, softer and a lot more
'feel' to it.
Geoff.
When you say both ways, you mean front ports to back brakes or front ports to rear brakes work equally well,meaning a 50/50 split?
I only have three pipes one to the back two to the fronts and was a little concerned that if it was a "X" split life would get interesting
the first time I jumped on the brakes!
Yup, one axle to front ports, the other axle to rear ports, 50/50 not diagonal. Same as you I had three pipes and four ports, I blanked the spare port
with a 12mm bleed nipple.
I'm still not really sure what the Primary and Secondary notation actually means - if you look at the design of the cylinder, it doesn't
favour either circuit, failure of either will still leave the other circuit working, albeit with a longer pedal travel. Maybe somebody will
enlighten........
Thats fantastic, just what I was looking for.
Back to the Garage!
Ta