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brake lines
https://www.ausmini.com/forums/viewtopic.php?f=2&t=51942		 Page 1 of 2
Author:  Bfeboi [ Tue Apr 07, 2009 9:04 pm ]
Post subject:  brake lines
Quick question to all you mini geniuses out there.

can you fit a dual brake line system to a single system car? including swapping the master cylinders? or do i have to have a engineer cert for that?
Author:  simon k [ Tue Apr 07, 2009 9:14 pm ]
Post subject: 
can be fitted, no engineer cert needed as it was a production thing

I'd ask "why?" - it's common for the dual setup to be removed and replaced with a single
Author:  Bfeboi [ Tue Apr 07, 2009 10:11 pm ]
Post subject: 
in my mind it would be safer to have a dual system in case there is a break in a line somewhere i would still have the other half to save me

or is there something wrong with my way of thinking?
Author:  david rosenthal [ Tue Apr 07, 2009 10:20 pm ]
Post subject: 
nothing wrong with your thinking just the system you want to use. A half baked idea braking system .
If it was off a good designed car then no problems, plenty of problems with the clubby dual system.
The other alternative is to use a system like the system on race cars ,two m/cyl and completely seperate front/rear brakes
Author:  Bfeboi [ Tue Apr 07, 2009 10:38 pm ]
Post subject: 
did the late minis come with a dual system? My mini is a 64 (if that helps)
i was thinking of running a dual system nsf-osr osf-nsr type while also using an adjustable brake bias valve.

has anyone done this?

Also are the dual master cyl straight bolt on job?
Author:  Jonsey [ Tue Apr 07, 2009 10:39 pm ]
Post subject:  dual brake lines
Lol, and then if your front brakes fail you still have no chance of stopping! :lol:

Nah actually that split front rear option sounds like a good idea.

I was thinking about how you would do this as well.
Problem with dual brake lines going to each wheel is where the 2 lines join. If line 1 fails, what stops all the fluid in line 2 leaking out. I presume the dual line clubby hubs have a specific design to prevent this? If so you would need to replace your standard single line hubs with clubby dual line hubs.
Your standard single line hubs just wouldn't work (please correct me if I am wrong).
Don't know how this works with disc brakes either, did any clubbies have dual circuit disc brakes? I think the disc brakes on mine are from an LS and they are standard...

Jonesy
Author:  simon k [ Tue Apr 07, 2009 10:42 pm ]
Post subject:  Re: dual brake lines
Jonsey wrote:
Lol, and then if your front brakes fail you still have no chance of stopping! :lol:

Nah actually that split front rear option sounds like a good idea.

I was thinking about how you would do this as well.
Problem with dual brake lines going to each wheel is where the 2 lines join. If line 1 fails, what stops all the fluid in line 2 leaking out. I presume the dual line clubby hubs have a specific design to prevent this? If so you would need to replace your standard single line hubs with clubby dual line hubs.
Your standard single line hubs just wouldn't work (please correct me if I am wrong).
Don't know how this works with disc brakes either, did any clubbies have dual circuit disc brakes? I think the disc brakes on mine are from an LS and they are standard...

Jonesy


nope - single master cylinder, single set of pipes, just a little biasing thingy on the firewall - nothing flash
Author:  Bfeboi [ Tue Apr 07, 2009 11:08 pm ]
Post subject: 
has anyone on here thought of or have fitted a dual system? whether they were disc or drums on front?
Author:  sports850 [ Wed Apr 08, 2009 7:16 am ]
Post subject: 
From memory Metro discs are originally intended for a proper dual system (need a pipe or hose to bridge the two sets of pistons) so they would be usable if you had an appropriate master cylinder/cylinders . Not sure about plumming it all in though .
Author:  drmini in aust [ Wed Apr 08, 2009 8:16 am ]
Post subject:  Re: dual brake lines
simon k wrote:
Jonsey wrote:
Lol, and then if your front brakes fail you still have no chance of stopping! :lol:

Nah actually that split front rear option sounds like a good idea.

I was thinking about how you would do this as well.
Problem with dual brake lines going to each wheel is where the 2 lines join. If line 1 fails, what stops all the fluid in line 2 leaking out. I presume the dual line clubby hubs have a specific design to prevent this? If so you would need to replace your standard single line hubs with clubby dual line hubs.
Your standard single line hubs just wouldn't work (please correct me if I am wrong).
Don't know how this works with disc brakes either, did any clubbies have dual circuit disc brakes? I think the disc brakes on mine are from an LS and they are standard...

Jonesy


nope - single master cylinder, single set of pipes, just a little biasing thingy on the firewall - nothing flash

Late Clubbies did have a tandem master cylinder and the system was split front/rear.
BUT...
It didn't really work. If you went and undid a rear bleed nipple, the pedal went to the floor. :evil:
It was fitted to comply with the ADR rules at the time.
IMO it was no safer than the previous single line system, just more bloody complex.
Author:  david rosenthal [ Wed Apr 08, 2009 10:09 am ]
Post subject: 
There are pedal boxes with two brake m/cyl and a balance bar for braking effiency front /rear. If you look at ASP clubman Racing website they have some pics of them. These are quite legal for street cars as they are made by Rory Thompson who is a ADR design engineer in SA
Author:  peterw [ Wed Apr 08, 2009 1:36 pm ]
Post subject: 
Minis have a great handbrake when it is adjusted properly. It will certainly slow you down in an emergency, probably just as well as half a dual circuit system. That's what I would use as my fail safe.

Most modern cars have 4 wheel discs and ordinary handbrakes. They really need dual circuits.

Pete
Author:  blue_deluxe [ Wed Apr 08, 2009 2:42 pm ]
Post subject: 
Quote:
There are pedal boxes with two brake m/cyl and a balance bar for braking effiency front /rear. If you look at ASP clubman Racing website they have some pics of them. These are quite legal for street cars as they are made by Rory Thompson who is a ADR design engineer in SA

The main problem with the dual cylinder pedal boxes is the adjustment of the balance bar. The motorsport team im in run one and had massive troubles bleeding brakes and adjusting the balance bar. Where one circuit was dry and the bar just bent in single shear. Was very bad, lucky it wasnt on track.
But if you can sort out these problems its a very good system. Certainly looks the business.
Author:  Bfeboi [ Wed Jun 03, 2009 2:47 pm ]
Post subject: 
Can i bolt this dual MC [http://www.minisport.com.au/prod604.htm] directly to my early model mini (64)? Or is there more too it. Piping is not that much of a problem at this moment in time.
Author:  NG [ Wed Jun 03, 2009 6:24 pm ]
Post subject: 
i think this is kinda what im trying to do?

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