Cortina Booster / master swap

[MarkZE]

I am after some ideas on which booster and or master cylinder to use in place of the original TE cortina unit.

I have gone to flacon four wheel disk brakes with four spot RX7 calipers up front. A willwood brake proportion valve stops the rear brakes locking.

The pedal is quite long and squishy so I want to go to a bigger bore master. Something like a 25mm boore would be good as cortin is only 7/8"

Does anyone know a cylinder that will bolt onto the cortina booster or alternatively a booster and master cylinder combination that can be adapted to the Cortina firewall?

[dattoman1000]

P6258a Falcon master cylinder. Adjust the front booster pushrod. File one the mount holes to suit the slightly wider spaced master.
Instant 1" conversion

Leave the money on the fridge on your way out.

[MarkZE]

Dattoman,

Sounds like you have got a handy catelogue!

Now if I go to the wreckers and ask for one of those, what model falcon might it be hiding in?

Is there anything bigger than 1" in that book of yours?

[dattoman1000]

Sad to say but I don't use a catalogue. Its all in me head :/
I do this from home in my spare time

XW-XB falcon. XY-XW has switch pointing down. XA-XB has switch on side near 2 outlets

Each master has 3 outlets. Your possibly only going to use 2. So just screw a 3/8unf (P4433) bleeder into the one underneath.

Nothing bigger straight out of the box thats easy to adapt I'm afraid. But in reality you shouldn't need anything bigger.

[MarkZE]

Thanks Dattoman,

I think I have seen the type you speak of.

Is that the cast aluminium type which have the reservoir etc all cast in one with a pressed steel lid and a wire clip holding it on?

I considered that type as they were one of the few masters around with the two bolts horizontal rather than angled slighty.

I do have three lines so that will work out okay.

You say the fittings are 3/8"?

Is there something that is metric? Cortinas have M10x1 flare nuts.

I want to avoid having to flare the lines as they are a major pain in the ass to get out of the car. I also want to be able to swap back to the standard one quickly if I don't like the new one?

Would there be any advantage in trying to go to one of these Quick fill type ones that people keep mentioning on here? Sounds like a good idea.

If those master cylinders are what is responsible for the brakes being so good on EA falcons then I want one.

[dattoman1000]

Yes the cylinder is the alloy one with the pressed steel lid

Fittings are 3/8 unf You'd need to run adaptors if you want to retain your orig nuts and be able to swap back when you need to. Only thing is I can't think of an adaptor off the top of my head. I will check at work tomorrow.

Forget fast fill masters. Nothing avail unless your going to change to a diagonal mount. This will mean modding a booster and master combo. This will make it harder to switch back when you need to also. All fast fills run metric threads.

Oh yeah...........EA brakes are crap

[MarkZE]

Where would I get these Adapters? Does any old brake place stock them?

In defense of my comment about EA falcon brakes. There is nothing special about them, sliding calipers moderate sized brakes etc and I wouldn't want to be cutting too many laps around willowbank raceway in a stock falcon.

In my opinion EA falcon and for that matter any falcon after that had brakes that feel nice and are easy to use in day to day driving.

Compared to the brakes on a VN commodore they ar pretty good.

My cortina brakes feel like a VN commodore.

They are not inspiring in a street legal car which does 200km/hr by the end of the 1/4 mile

Do any Japanese cars use the fast fill type master cylinders. I have seen a lot of them have the horizontal bolt pattern on the booster?

[dattoman1000]

Any old brake place should have them

Fast fill type masters are usually either Australian or American. Very few jap cars use the system

I'll try to remember to have a look tomorrow and see if anything fits. And I'll try to remember the adaptor #

[dattoman1000]

Well I looked and nothing in the fast fill range fits the Corty booster

The adaptor fittings I was talking about are M120-6
However the female thread is 10x1 to suit inverted flare as opposed to your original ball type flare. So unless your willing to drill out the brass inversion to suit the ball type flare then I'm not sure what you'd use. I can't recall ever seeing the corretc fitting your after

The fittings should cost you about $5 each.

[MarkZE]

Dattoman,

I got a brainwave on the weekend.

I looked at the booster ans realised it was a servicable one. It has a big clamp around it holding the front and rear halves together.

I reckon I can loosen the clamp and I may be able to spin the front cover relative to the rear cover so I have the diagonal bolt pattern?

The only thing I can think of that might stuff that idea is the possibility that there will be some locating detents that lock the two halves in the right place before the clamp goes on. I'm sure I could modify those a bit with a grinder or something.

If I was to arrange the diagonal pattern is there a fast fill master cylinder that has the right or close to the right bolt spacing to fit?

I had a spare booster for ages and threw it out a little while ago figuring it had been sitting around for so long it would be stuffed! Spewing.

[dattoman1000]

I doubt it but I'll check it out.
Theres nothing to stop you rotating the can to any angle