17 replies to this topic

[clivemk1mini]

As above I'm building a 1330 blow threw supercharged mini, I will be sticking with 10" wheels and was wondering if my standard 7.5 cooper s setup will be able to cope with the extra stopping power needed or should I change the callipers for 4 pots?

[SamMason]

Personally I'd get the best brakes you can.. Just to be safe..

I honestly don't know the difference between them (a lot of learning left to do here!) but from a safety point of view, get the best that you can..

[racingbob]

obviously the 4 pots be better

however see the car on my picture on the left here

it had cooper s set up 7.5 had 120 bhp at flywheel

[jaydee]

4 pots alloys are lighter, improving front suspension=better handing.
Get the best quality discs and carbon metallic pads, and the standard 7.5" setup will be really good.

[clivemk1mini]

If I can rebuild my callipers and buy good discs and pads and they will be capible of stopping me I don't see the point in spending the extra on 4 pots. But if there not going to be up to the job then I would get 4 pots

[jaydee]

To be honest the biggest improvement the 4 pots will give is in handling terms.
Cooper S calipers will be capable of stopping the car for sure, plenty of historic race and rally cars that use them.

[Ethel]

It's how fast you are going, rather than how much power you have, that matters. Though more power means you can get to a higher speed before you need to brake for the next corner. Two and four pot calipers have very similar total piston areas so develop almost the same pressure. 4 pots get a bit better leverage by being further from the axis

I don't think you'll notice much difference, do what you can to help keep them cool.

[Cooperman]

Brake pads and brake fluid are the critical items. I have rallied many Cooper 'S's with sold 7.5" discs and 2-pot calipers without any fade issues. I now always use carbon-metallic pads and AP600 race brake fluid and the brakes are fine, even on long and twisty tarmac rally special stages when I can get the discs literally glowing red.
Just make sure the discs are top-quality and they and the calipers are in top condition.

[essexdaz]

That is all us mini 7 drivers use, 7.5 s setup. Good fluid and carbon met pads.

[clivemk1mini]

What discs should I get? Also do mini spares sell the carbon metallic pads

[Cooperman]

Yes, I get my Carbon-metallic pads from Mini Spares. Simon@MiniSpares there and on here knows the ones you need.

[clivemk1mini]

What disc should I go for?

[Cooperman]

Mini Spares Part Number:

BRAKE PADS "S" CARBON MET...C-8G8993

[clivemk1mini]

Ouch £75 for pads lol

[bmcecosse]

The 7.5 brakes will be plenty good enough - but I would try rather less expensive pads at first!