Kad 4/6 pots opinion please.
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HI

Rung kad yesterday wanting some ultimate 6 pots , I explaind that i may be going to 13's but on 10's at mo and would like to upgrade brakes if i do.

Said they do a type A and type B the A goes no bigger than a 8.4 disc but the B goes up to big 10.5 with alloy bell, said the B would fit under the 10" wheel but may have to machine disc down to 7.9 maybe 7.5 due to size of caliper.

The thing that botherd me was that if it went to 7.5 the pad would slightly hang over at both outer edges due to the size ?

He said that what id lost disc size would obviously be made up on surface area with the bigger calliper and pad.

Your thaughts please ?

Should i go big or make do with the smaller caliper that fits under the 10 but un able to go huge at a later date ?

Thanks Rick

Hi,
I'd always go for the biggest brakes possible. For that reason I won't go to 10" wheels.
I would have thought there would be a better selection of race rubber for 13" too?
Cheers,
Gavin :)

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i have four pots have no issues plenty of stopping power

from the look of my type A 6 pots I reckon they would take a larger than 8.4" disc, I'm pretty sure that the outer contour of the pads used would suit a disk of about 9.5"

Save yourself some money and get MiniSpares 4 pots.

Paul

I seriously doubt it!

Just a thought,

but Kad did realise that you have split rims?

with splitties and type A's you should be able to run 8.3-8.4" disc's.

Hi Yes he new i had splits.

Well am hopfully going for quality and quantity ?

So what do you think mini13 should i go with the type A's , just thaught with the b's i could go for the 10.5 with separate bell ?

well.....

My current plan is,

although I curently have 7x13 superlites on the car, (they were cheap)

I aim to try a set of 10's against 13's and see which i like best.....

If i end up with the 13's I will get some blank bells and 10.? discs from rally design as the calipers are radial mount.

I grabbed a couple of pics of the calipers, this is with 8.3" discs, notice in the middle of the pad there is about 2-3mm fo disc poking out.

OK, he's my two penneth worth.

way back in 97 whilst hillclimbing my lightwieght. all up weight with driver 520 kgs

this was my twinnie before thing went really seroius,

i have only ever used the minispares centre cast alloy 4 pots,
down the thompson straight and into to the esses i was shown a photo of my car on its two front wheels, the rears clear of teraferma,

7.5" disks

need i say more,

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

Hi,
Size has a lot to do with it. The same caliper on a larger disc has more leverage against the rotation of the wheel and so excerts more braking force.
More stopping power for nowt :)
Also more disc surface area will dissipate heat faster, as too will larger wheels :)
Cheers,
Gavin :)

VEMs Authorised Installer / Re-seller. K head kits now available!

WB/EGT gauges. Click here for customers write-up

Visit www.doyouneedabrain.co.uk

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Whats the point of six pistons?

Larger pad area?, did we not learn that friction is dimentionless, thus bigger pads do not increase the braking forces. What they do is increase the contact area, so can disipate the heat better and not 'fade' as easy. When has anyone managed to get 8.4" discs to fade?

If the piston area is larger on these six pots, then the braking force will go up. but pedal travel will be more with less effort

Increasing the disc diameter will increase the braking force, for less effort, so with six pots with larger piston area, larger discs with a bigger radius of gyration the braking force goes up and the effort goes down its rather alot if you ask me, brakes are only as efficient as the grip your tyres provide

TBH six pots and large discs is overkill!!

Large discs and four pots is a good option, going smaller on the disc to me is daft as you are reducing the brake efficiency, but, as Carl has said, there is plenty braking in the 7.5"s with four pots.

Six pots are bling unless you consider doing the Le'mans 24hr where wear is a factor and they can become usefull.

Carls car weighs F all and hillcliming will the brakes get a chance to get hot?

The pad area is big on the 6 pots, as you say this will not give more stoping powere as friction is dimensionless, but as you say the larger pad area will dissapate more heat.

The 6 pots (suposedly) distribute the load more evenly over the pad giving a more even heat distribution and therefore less fade.

the 6 pots will not give much more in the way of extra area, this would be pointless anyway, as the maximum pressure is sort of governed by the available stroke of the master cylinder.

Large disc's and 4 pots as you say would be a good option, but I wanted the freedom of wheel choice that a radial mount caliper gives.

Also, I am yet to drive a car and not experience fade.

Edited by Joe C on 18th Oct, 2007.

I have driven hard on the tracks here in Norway for 15-20 minuts in one go, one of them is REALLY hard on brakes. It made my 7.5" discs go blue, but I did not feel the brakes fade at ALL! and I do not use any special brake fluid or anything, normal petrol station dot 5.1

My setup is standard 7.5" s discs, 4 pot minispares calipers (nice parts!) and most important, carbon metalic pads! they make your wheels dirty, but are amazing!

im thinking of going down the same rout as wolfie uses on his mini aloy 4pots and 7.5" disks. i havnt been in a mini which stops that well before in my life and i though mine stoped pritty well (standard 2pots grouved disks and green stuff pads) tbh to a mini 6pots seem a bit much for such a light car

Drives
-Ford S-max Mk2 Ecoboost
-Rover 100 VVC #2 - track project

Searching is all you need on TurboMinis

is there must difference between the 8.4's and 7.9's when you consider the pad placement?

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

Right lads ive orderd them.

Got the 6 pot type A coming and going for a 8.3 disc. Yes i understand that a 7.9 with a 4pot would be adequate but i wanted more, there going to get some stick when on the track.

Thanks everybody for the opinions tho it has helped.

Rick

only just seen this but its everything you need to know has been said.

all i can say is you should be fine with the 10s and 8.3" discs, thats what im doing.

Yes think thats it andy , just upset i got gold and not blue like yours. Shouldnt moan its what they do that matters.

Have you been busy in your new sauna ??

Edited by cossierick on 19th Oct, 2007.

yeah the blue is a bit pretty!

sauna lol!

yes i have been, ive got a lot more of the cage fitted and im just starting to sort seat positions and stuff!