Hi
I asked a question on here about swapping the Sierra brake master cylinder for a Cortina MK3 or Fiesta Mk1 non servo in an attempt to get a nicer brake pedal.
One of the things that came up was that both of these are four ports as opposed to the Seirra which is
A three port.
The question is can you mount a four port master cylinder and block off one port?
Are they connected inside in parallel or diagonally internally?

yes you can block one of the two ports at the front off, doing so will have no effect on the cylinder performance.

front pair of connectors do both front brakes, rear pair do the back.

[Edited on 13/1/09 by Mr Whippy]

Watching with interest! Will change mine if it works.

Just put you brake light switch in the spare hole.

quote:

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Originally posted by coozer
Just put you brake light switch in the spare hole.

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Or fit the proper bung.

I'm working on this too at the moment. I'm going to keep the sierra m/c and mount it in its correct position so that the top of the reservoir is level (it's tilted backwards at a 10-12 degree angle in the sierra). I can then keep the pushrod straight and mount it lower down the pedal. A quick calculation shows that it will increase the pedal ratio by approximately 50%.

I'll be making and mounting the spacer within a few weeks, after the engine is out (I've got some cleaning up to do after 4 years on the road, an engine swap and the Megasquirt install....)

Will let you guys know how I get on.
Cheers,
Sebastiaan