Hi All

Just after a recomendation on what sort of brake master cylinder is best. I have 8.4 single pot disks on the front drums on rear. Are they all pretty equal or are there some I should avoid.

Cheers Phill

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KillaWatt Converions


"E"Mini, 144volt, 600 amp, 86kw from the get go

they're all about the same

I guess a recommendation is don't get a tandem one...

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Why not Simon - I am hooking up my disc brakes to the tandem system for the drum set-up on the S - is there something I dont know about?? Is this a problem using the tandem system on the disc brakes?

It is a genuine question - I dont want to be fiddling with a clevis pin again!!!!

Hooroo

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Rob Forsyth
Miniot!!

I ran Cooper S Disks on my 78 with a tandem cylinder without any worries at all. Of course you have to run without a booster, or maybe with 2 but I loved my Disks un-boosted, nice feel and worked a treat.

We're about to do the same to our 76 as well.

Dicko

nah, I don't think there's anything wrong with them, just if you don't have one already, don't get one cos (more complicated than a normal one etc. etc.)

I've got one to put on my conversion, the engineer said I had to have tandem...

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did I tell you that I won a trophy?

Would the weight of the car have any impact on the brake type used?
Eg, on a stock 850, drums and no booster are fine because the car is so light,
but on a later car with 8.4s, big wheels and generally more weight everywhere,
would an un-boosted non tandem setup work well?
It's something for my project car I've never decided.

Can't you just run the booster on the front circuit? Or better yet, get a dual circuit VH44J booster, that you can run on both front and rear circuits.

Booster works fine on the front circuit only.
When the chips are down, under hard braking the rears do SFA anyway.

<edit> typo

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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.

aside from locking up when they've got too much pressure

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did I tell you that I won a trophy?

That's the original Cooper S/Innocenti B39/Clubman GT setup!
(With remote servo)

I use GMC227 tandem master (M10/M12 connections), Cooper S 7.5" disk brake, 1275GT servo (front circuit) and 17.5mm brake cylinders (1275GT size) at the rear.

Important is to run smaler brake cylindes at the rear to prevent over-breaking at the rear which can be quite dangerous!
And of course you need front/rear split circuits...

Cheers,
Jan

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No speakers, no bodykits, no six-inch spacers, no spak filler, no bullshit

I'm not sure about later post 71 english models, but all cooper S Mk1, Mk2 were all single line. The booster took a feed direct from the master cylinder and pumped it back in at the t-piece next to the engine steady.

The only dual circuit cars we got down this neck of the woods was in the very late Clubmans.

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.