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DIY Classic Mini Brake Articles

BRAKES - Fitting discs and required ancillaries  (Calver's Corner)
What you actually need for the disc/drum conversion is pretty straightforward. Disconnect the steering arms, top and bottom swivel-pins, CV joint, and flexible brake pipes at the subframe - that’s it. There are, however, a number of ancillaries to consider. Basics Fitting discs designed for the Mini is easy enough. Just make sure you use CV gaiters for the disc-brake set-up - these have a different bellows shape to stop the gaiter rubbing the inside of the hub. The drum type will rub, then split, shedding grease all over the place. Moly grease is mighty mucky stuff to deal with and doesn't assist braking at all! A tip for racers - to stop the gaiters over-expanding when getting very hot and imitating the aforementioned, put either a decent sized split pin or (my favorite) a piece o...
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BRAKES - Fundamental considerations (Calver's Corner)
When looking to increase their cars performance, most folks immediately turn to considering higher engine power outputs. Because of this pre-occupation brakes tend to slide down the improvements priority list. However, they are far more important - being able to accelerate at warp speed to hyper-space in the twinkling of an eye is all very well, but disastrous if you can’t stop. You will mak...
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BRAKES - How they work (Calver's Corner)
New Page 1 This time we’re going to look at just how brakes do what they do, and ways to improve them.   Without a doubt the most important point to get sorted at the outset is just what makes brakes do their thing - FRICTION. The sole purpose of the brake set-up on any vehicle is to convert kinetic energy into thermal energy. In English that’s motion into heat - friction. The...
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BRAKES - Pad types & choices for the MINI Cooper & S (Calver's Corner)
I know I keep dragging this one out for an airing but it’s continually ignored by far too many folk - the only way to get the best from what you have is to betotally honest with yourself about your Mini’s main usage. Delusions ofgrandeur cause severe disappointment, and tears before bedtime. Fitting a set ofpads to your road Mini because you think you drive like Michael Schumacher, and...
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BRAKES - Pads, function and parameters (Calver's Corner)
The past few years have witnessed a great deal of activity in the brake-swapping department by Mini enthusiasts world wide. The reasons are quite diverse, ranging from fashion to necessity. Some fit vented Metro 4 pot brakes because it’s the ‘in’ thing to do, giving max pose value. Some believe it’s a performance improvement, usually misguided by a misinformed vendor hell b...
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BRAKES - Pipe end flares (Calver's Corner)
  One day I'm going to have to try and assess just how it is that every now and again I get a 'run' on folks asking me about a specific problem. These problems exist all year round, year in, year out. And said problems crop up throughout the year. But - every now and then there's a blood-rush on a certain issue. Just recently that issue has been brake pipe ends. The bit that seals the pipe...
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BRAKES - Rear brake bias adjustment (Calver's Corner)
Brakes - Rear brake bias adjustment When altering the front brake set-up away from the standard installation, it invariably alters the amount of rear brake bias needed to re-balance the cars brake balance.  The problems start occurring when folk graft alternative brake set-ups onto the front of their Minis. Be this 7.5" discs onto a previously drum-braked model, or going from current standa...
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BRAKES - Silicone brake fluid, to use or not to use - that is the ques (Calver's Corner)
Over more recent years I've had affair number of discussions on the use of silicone brake fluid as opposed to the more common type. I have to say some folk are vehemence in their belief that this stuff is 'the answer' to all kinds of brake maladies. Some time ago I contacted the two major brake specialists in this country (UK) to see what they had to say. Their reactions was as vehemence as those ...
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BRAKES - Split brake systems and adjustable bias valves (Calver's Corner)
You can only use the MS72 adjustable brake regulator/bias valve with a front/rear split system. Definitely NOT the diagonal split type (for identification see 'Brakes - Rear brake bias adjustment'). These should have been 'X-ed' at birth. Makes the car handle very interestingly when the system only operates the diagonally opposed brakes. Scary stuff. Almost as much fun as when the rears only ...
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Competiton brake pads (Technical Information)
BEDDING-IN CARBON METALLIC PADS Carbon metallic pads will fade at high temperature if not fully bedded. Only fully bedded pads will provide fade-free high performance. For maximum efficiency, new discs are recommended. AP recommends that the pad be bedded with the actual disc on which it is to be used. A pad can be heat conditioned on any disc, but it must be run with a coated disc to perfor...
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Hawk Brake Material Description (Technical Information)
Hawk Brake Pads The Leading Edge InMotor Sports Braking Material Description Hawk Brake has utilized world class technology to develop and manufacture superior disc brake and clutch materials for the Automotive/Racing industry. Hawk products include Ferro-CarbonTM, CarboticTM, Carbon-Carbon and full metallic disc brakes and clutches. Hawk Brake's persistent development of racing friction will...
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Metro 4-pot conversion (Technical Information)
Modified Mini Car Club S.A INC The big Metro 4-pot conversion By Gemma Kernich.   From my time on the Internet it became apparent that in England there is an easy and inexpensive option to upgrade Mini brakes, thanks to their favourite donor car, the Rover Mini Metro. (If you want to know what a Metro looks like, watch The Bill on the ABC - the small patrol cars they drive are Metros) &n...
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Mini Brake Data (Technical Information)
mini brake data When working on your brakes, ensure that the brake pads, shoes and hydraulic cylinders used match the specifications given below. Over the years, many changes were made to Mini brake configurations. The manufacturers tinkered with the master cylinders and rear brake balance valve, and rear shoes and cylinders on many occassions, and did not necessarily write these ch...
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Mini Front Wheel Bearing Seal (Technical Information)
Question:"Im replacing my front wheel bearings on my 78 leyland. (drum brakes) I fitted the new bearings and seals and went to fit in the drive flange and i noticed the seal is too big to seal on the flange. Is there a sleeve or spacer that the seal seals on?" Answer:"Yes there is a tapered collar that sits between the flange and the bearing.  You must have set them aside when cleaning thing...
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Upgrading Mini Brakes (Technical Information)
Upgrading Mini Brakes Over 5 million Minis have been made, most of them before 1985 when front disc brakes were standardised. Previously, standard Minis were fitted with drum brakes all round, adequate in light traffic but prone to fall out of adjustment, not very progressive unless recently overhauled, and not up to the quick responses needed to avoid accidents in modern high-density traffic. M...
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Warped Rotors Means Pulsing Brakes (Technical Information)
When you apply the brakes, you feel a pulsation through the brake pedal and even the steering wheel. You wonder how the brakes and steering are interconnected and what is causing the pulsation. How can it be prevented, and how can it be corrected? And most important, is it a safety issue?The cause of pulsation and vibration are warped brake rotors. When brakes are applied, the brake calipers press...
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