Vented discs under 10"

Very nice work. Makes me regret getting the Camira/Commodore conversion.

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Too many cars, and too little time.

The std small type drive flange is sandwiched between the spacer to the rotor and the spacer on the outisde. The 2" long wheel studs are press fitted thru the outer spacer that is 22mm thick. There are 4 X 10mm x1.25 pitch socket head bolts that go thru the outer spacer, drive flange and inner spacer that screw into the disc rotor. Once the whole assembly is bolted up it becomes a solid unit and has spigots machined into them for accurate aglinment. The only part that could break is the spline stripping. If you look at the spline dia and length between the two types and do the shear calcs, the drum hub type is stronger than the cooper s type.
What I do for all the larger wheel convs is fit either 7/16" or 1/2" wheel studs. I have seen too many 3/8" ones break with big wheels. The other flange I use is the ones off a morris 1100 which is 4 1/2" PCD as the range of rims to suit is better tham 4" pcd

The break line inlet is std mini thread [3/8" unf] and the same with the bleed screws. The std hose just screws into caliper.

Tombo; there is a lot of machining done on a milling machine as well. If you need to use one, there is one living in my shed.

The pistons are made from 1 1/2" centerless ground stainless stock bar. They are machined to length and have a counter bore in one end. Exactly the same design as mini and most disc brake pistons. The seals are std PBR item Part No MP0554

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Research is the difference between speculation and investment. Anyone who copys some one else will always be second
www.minisprintgt.com

David, if I put your beauties on the front the following set on the rears, would I need to anything to brake bias?

http://www.jcwhitney.com/Simulators/GP_ ... viewflag=1

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One should never skimp on the zip ties.

David,,, as always,,, you do toooo good a job for tooo little money

well done son



I might even talk with you soon for a set for my alloy V8 speedway mini,,, cheaper & better than "S" discs & i`d had to smash a set of "S" discs into the concreat wall

Not suggestinhg that i`d actually intentionall hit the concreat wall with your brakes fitted ,,, of course i`d make every concerted effort to retard forward motion before such impact takes place,,, but there`s always a chance that someone may push me into the wall, effectively rooting said disc brake assys, along with the wheel/tyre assy , sterring rack tir rod end, subframe, control arms etc etc etc

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

Fair enough with the shear calcs on the spline for the flange and the moutning arrangement.

Have you done any heat calculations? i think this is where the greatest benefit will be for racing applications. No more boiling brake fluid to ruin th day

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the world is a book, and those who do not travel read only a page
66 Mini Minor sponsored by http://www.lifeonthehedge.com.au/ The Dog Harness Specialists
It was a pleasure ausmini. I'll miss all you misfits and reprobates

Well done David, have you fitted these to a car yet

how would you describe the retardation (given the pads used) Savage? progressive? Awe-inspiring?

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"Show me the Mini!"

The 6062 T6 alloy has a faily low expansion rate and is used in brake applications on aircraft. The inner half of the caliper is in full air flow inside the wheel and the holes in the adapter plate direct air to the inside of the rotor[air scoop to be fitted] I am looking at machining fins in caliper body to also help cooling.
The pads are the same as the suzuki conv but the 4 piston is 3.58sq" per pad and the suzuki caliper[single piston ] is 4.03sq". I have found that the suzuki conv with a 5/8" m/c stop better than S brakes due to the bigger pads. The 4 piston caliper would be more progressive due to the design and would require less effort on the pedal.[force= pressureX area]
This set-up is for drum hubs but one to fit cooper s hubs would be cheaper[no adapter plate and less machining] I am also looking at a fixed caliper with a floating type piston[same as Formula 1] with this set-up there is cooling around the piston body. The caliper body has no piston wear and the piston assembly can be removed for o/haul. a set with 6 different size pistons is the next idea.
These brakes are to go onto a mini with a set of mira soild rotors with magna[PBR alumin calipers] on the back with dual M/Cyl and independant system.

PS if you want to buy alumin then go to SURMAN METALS they have a bigger range of alloys [including stainless steel and other metals] and are half the price of capril. They also sell alumin round bar upto 500mm in diameter. HMMMMMM!!! alumin flywheels
The price I have quoted is for a complete set-up to bolt on, but the cost is reduced considerably if you want to fit to cooper s hubs and have other parts that can be used.ie studs,wheel brgs etc

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Research is the difference between speculation and investment. Anyone who copys some one else will always be second
www.minisprintgt.com

Every time a set of 4 pot calipers come into a conversation, someone asks if they will fit under a standard Cooper S wheel...and the answer is always no.
I'm gonna be that guy and stick my neck out....

Will they fit?

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SooperDooperMiniCooperExpertEngineering

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

They will NOT fit into a std mini rim. I have not got and do not know the measurements of a cooper s rim compared to a std rim.
The std rim is app 2 1/2" from the back of the center to the top edge of the smaller section [app 8" diam] [looking from the inside of the rim] The 5 1/2" contessa mags that I have are 1 1/8" for the same measurement.
Both rims are the same inside diam for the smallest section app 8"
If some one can supply me with the measurements or even a rim to try we might solve the problem.

edit I just measured from the rim face to the caliper side and this is 30mm. The shape of the edge of the caliper fits into the curve of the mag to the larger dia. The overall diameter of the brake[center to caliper outside is 235mm]

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Research is the difference between speculation and investment. Anyone who copys some one else will always be second
www.minisprintgt.com