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PostPosted: Fri Jan 06, 2006 2:26 pm 
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848cc
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Joined: Tue Jul 06, 2004 9:08 pm
Posts: 211
Location: Melbourne
Is there any disadvantage over having a mini with a Duel circuit master cylinder over the single circuit, cause i have a brand new single circuit cylinder, but the tandem one works fine aswell although its is getting old, i am putting cooper s disc brakes and also wanted to know if the duel circuit cylinder will work ok.

also what is needed to convert from duel to single apart from the master cylinder

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77 Leyland Clubman
1293cc, LCB extractors, pulsar dizzy (recurved), cooper s disc brakes, 40DCOE Weber


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PostPosted: Fri Jan 06, 2006 3:56 pm 
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1275cc
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Joined: Mon Sep 19, 2005 4:57 pm
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Location: Gulgong
Dual circuit were fitted because of ADR design rules and the fact that itstill gave you brakes should a circuitfail. Minis are good at that.

Having said tha, single circuit brakes were around for a long time before the dual circuit and legendary mini heroes like Paddy Hopkirk, Rauno Aalternen and Bob Holden had complete trust in the single circuit brakes.

A down side of the dual circuit is that its fairly difficult to fit a booster on just one circuit and have even hard braking.

Disk brakes use different sized wheel cylinders on the rears and probably have a different pressure limiting valve. Others on here should be able to give you specific change over information for wheel cylinders etc.

I simply bolted a set of 7.5 inch discs on my mini and made no other changes and found the brakes were very good. I do not run a booster but i am not super sprinting or caning the car.


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PostPosted: Fri Jan 06, 2006 6:46 pm 
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Joined: Fri Mar 19, 2004 6:19 pm
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Location: near Baulkham Hills, NSW
We've got 2 Minis with S front discs, one has a Cooper S M/C and the other the late Clubby tandem one.
Brakes work the same on both, but I needed to fit Cooper S rear wheel cylinders (5/8" dia) to both cars, to stop the rears locking during panic braking..

If you must have a servo (booster), just fit it to the front circuit. :wink:

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:


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 Post subject: Dual Circuit Brakes
PostPosted: Sat Jan 07, 2006 9:52 pm 
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848cc
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Joined: Fri Oct 22, 2004 5:31 pm
Posts: 181
Location: Central Tilba NSW
I know the good Dr posted this before :lol:

Where do you get rebuild kits for these?
Are the plastic reservoirs still available?
What does the s/w on the side do, are they still available?

Blue

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 Post subject: Re: Dual Circuit Brakes
PostPosted: Sat Jan 07, 2006 10:02 pm 
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Joined: Fri Mar 19, 2004 6:19 pm
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Location: near Baulkham Hills, NSW
blumin wrote:
I know the good Dr posted this before :lol:

Where do you get rebuild kits for these?
Are the plastic reservoirs still available?
What does the s/w on the side do, are they still available?

Blue

Clubby tandem M/C rebuild kit is `PBR? K7800X, I got from B&R Brakes but any brake shop can get. Made in Oz. Price is around $35.
Unsure about plastic reservoir availability, or the switch.
Switch is for brake fault dash lamp I think... ours is not hooked up (it's in a roundnose).

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:


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 Post subject: Dual Circuit Brakes
PostPosted: Sat Jan 07, 2006 10:18 pm 
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848cc
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Joined: Fri Oct 22, 2004 5:31 pm
Posts: 181
Location: Central Tilba NSW
Thanks Doc

Blue

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