KAD Brakes

[steve]

Hi,
I am looking at upgrading my brakes on my mini traveller. It currently runs drums brakes and has 10" Cooper wheels (LP918 rims).
I made a template to check the wheel clearance (for 7.9" caalipers), but it it is far too large to fit under the steel wheels I have.
I was wondering if anyone here KAD brakes on their mini? And if so, what wheels do you use?
Thanks for all your help,
Stephen Miller

[Chalkie]

Mini sport do 4 pot 7.5 brakes they are really good

only time id buy KAD brakes if is i was running silly amount of BHP id buy the 6 pots

but the rear disc conversion they do is good but not much of a noticeable increase in braking its just much much lighter than the standard drum set-up to reduce unsprung weight

[999 ORX]

I have kad 6 pots on mine but I'm running some 10inch slit rims so there is ample room. If I were you I'd go for the mini sport 7.5 solid discs and 4 pots, there very nicely made and I'm prity sure they would fit under your rims, especially if you are using knock on wheel weights. Always check clearance if you have stick on weights! As a lot of the old fashioned 10inch alloys will have bad clearance with newer type brake set ups!

Are you going to fit a servo too?

[gr4h4m]

You won't get 7.9 under a steel rim du to the lip on the inside or you would have to run large spacer. Not my idea of fun.

A good numbe of 10" alloys will run under 7.9's .

I run 7.9 fiesta brakes with force racing rims.

[Pete]

Standard S brakes on mine, it'll lock up no problem.

[WNX700H]

Since my line of work is brake system design , I would recommendyou stick with standard S calipers , I had Minisport 4 pots on a car I bought and the stiffness of the aluminium caliper is significantly less than a std cast iron S caliper. Much firmer progressive pedal with the standard caliper.

Main issue with Mini brakes is the fact that the wheel is very small thus limiting the disc diameter and hence energy absortion capabilities. Multi pot calipers are used to increase the effective radius of the caliper ( by moving the diameter drawn through the centre line of the piston outwards from the centre of the hub) . So unless you go to bigger wheels the oprions are limited in terms of improving matters.

In the main the Metro had 4 pots in order to meet half system fail legislation so the two pots of the front L+R are one circuit and the other front pistons are in the same circuit as the rear brakes , this is deemed to be and H I split. This why there are two feed ports on Metro calipers

[Chalkie]

Since my line of work is brake system design , I would recommendyou stick with standard S calipers , I has Minsport 4 pots on a car I bought and the stiffness of the aluminium caliper is significantly less than a std cast iron S caliper. Much firmer progressive pedal with the standard caliper.

Main issue with Mini brakes is the fact that the wheel is very small thus limiting the disc diameter and hence energy absortion capabilities. Multi pot calipers are used to increase the effective radius of the caliper ( by moving the diameter drawn through the centre line of the piston outwards from the centre of the hub) . So unless you go to bigger wheels the oprions are limited in terms of improving matters.

In the main the Metro had 4 pots in order to meet half system fail legislation so the two pots of the front L+R are one circuit and the other front pistons are in the same circuit as the rear brakes , this is deemed to be and H I split. This why there are two feed ports on Metro calipers

Mark one disco's have 2 lines in too

and my mates run minisports 4 pots never have an issue at all if anything feel much better than standard S capilers (running Servo and mini fins & green stuff pads and mintex shoes)

[Pete]

my mates run minisports 4 pots never have an issue at all if anything feel much better than standard S capilers

That's assuming his S calipers were working properly and the discs were in good condition, which may not have been the case. Lots of the historic racers on here are using standard calipers.

[gr4h4m]

From what I have read, IMO the alloy calipers save weight.


If you want bigger brakes, size counts....

[Pete]

From what I have read, IMO the alloy calipers save weight.

Absolutely and when added together with other weight saving on a competition car makes sense but on a road car probably cheaper to go on a diet !

[steve]

Thanks everyone for all the advice!

[quote="WNX700H"]Since my line of work is brake system design , I would recommendyou stick with standard S calipers , I had Minisport 4 pots on a car I bought and the stiffness of the aluminium caliper is significantly less than a std cast iron S caliper. Much firmer progressive pedal with the standard caliper.
I would have thought that a high grade aluminium billet would have equal stifness to a standard cast iron caliper?

999ORX - No I'm not planning on using a booster at this stage

I have emailed MiniSport about their 7.5" 4 Pot Alloy callipers to ask if they have ever fitted them with 10" steel rims. If they don't look like they are going to fit I will prob end up with the standard S callipers, as I like the steel rims too much and Speedwell wheels cost moonbeams.

Cheers again for all the help!

[Chalkie]

my mates run minisports 4 pots never have an issue at all if anything feel much better than standard S capilers

That's assuming his S calipers were working properly and the discs were in good condition, which may not have been the case. Lots of the historic racers on here are using standard calipers.

System was working fine ran Grooved discs and green stuff but just down to messing around on the track use to lose braking a little bit so he went 4 pots and braking distance has shortened a bit too

I'm going to run 4 pots to be fair I like to feel whats going on. drums all round scare me to death.

But all IMO

[Dean]

If you just want disc brakes in steel rims then just go for standard S callipers. They work fine with or with out a servo, the mighty minis use them and they cope

But if you are wanting alloy callipers go for the mini sport or mini spares ones, or KAD ones but there set at a higher price but still a very good calliper

I know rich was saying that the mini spares alloy 4 pot callipers had more room inside a rosepetal rim than standard S callipers

I have found on my S callipers inside my MS rosepetals it hits the weights very slightly so a little filling need doing to the calliper but I would think a steel rim would have more room.

[Sean1380]

My 2 cents worth, brakes on my 1978 (UK Mk3 body) 1100 Delux (now 1380)

I had bought a set of Mini Sport 4 pots of a dude on the Turbo Mini forum, and i must admit, they looked freeking lovely.....

See....





Then i was told that they dont have dust seals, (not sure if its a fact though) and living in Africa, where in Winter it is dry and dusty, i thought it would be better to have a caliper with dust seals, so these were sold on to a dude that used them on his race car. i then bought these Mini Spares calipers, they do have dust seals.






Both sets of brakes were on Cooper S disks, and fitted perfectly under both my Mini Spares 6x10 Minilifes and the 6.5x10 Force Racing wheels.

Using a Dual master, running direct with no bulkhead valve, using smaller 15mm rear slaves, and brakes are awesome with no servo.