20 replies to this topic

[markrally]

Hi, im building a z-cars mini and i already have a servo and master cylinder from my donor car (97 cooper MPI) it it worth using it or swop for a master cylinder se-up only, Front brakes are vented KAD 4-pots, on metro discs, rear is sierra disc set-up.

What are the advantage's/disadvantages problems etc

Regards Mark :wales:

[Sprocket]

Deffo servo

Unless you got realy big thighs

or you use smaller piston master cylinder.

All depends on how you want the pedal to feel as without you will have to provide the force that you narmaly use and then also that what the servo provided

[Puddings]

KAD do a brake bias front to rear could be worth a look a bout half way down

[Sprocket]

KAD do a brake bias front to rear could be worth a look a bout half way down

Tis the way to go, you can then select the master cylinders to give you the right pedal feel you're after :cheese:

[Guess-Works.com]

Forget it... also to run the servo you need a source of vacuum, which has been relocated to the rear of the car.... hmmmm more piping..

Personally I'm not a fan of servo brakes on a mini, and for a car a light as a zcars all it's going to do is loose the feel of the cars handling.

[Wil_h]

I agree with guess work.

A servo dosen't improve the braking, omly reduces the effort on the pedal.

[The Matt]

But with it being a car that originally had a servo, how much effort will it be to remove it? Different brake pipe routing etc??

Also, think of the weight reduction by not having a servo!

There are plenty of fast motors out there that don't have a servo for the brakes, I reckon a mini stops fine without a servo (unless you find pressing the pedal really hard).

My mates Lotus Elise doesn't have a servo and that stops just fine! :wink:

[markrally]

KAD do a brake bias front to rear could be worth a look a bout half way down

I like the idea of the bias padal box as i had one on my escort mk2 and it gave no trouble at all. But i think it is a bit of overkill as my mini will be used on the road mainly so i dont have a clue what it cost but i would estimate £150 upwards plus the cylinders at £25 each. I think i may just fit a new mini master cylinder but will i still need the valve assembly that is bolted to the bulkhead and can i use the one i already have or is it for the servo assembly only? That's one for guessworks????????

Cheers Mark :wales:

ps does anyone know how much the KAD padal box is? and will it fit my servo type pedal assembly?

[Jammy]

If your talking about the brake pressure valve then they aren't dependant on servos.

[markrally]

Ive just had a look on minispares and a tandem master cylinder is over £100 new so the kad pedalbox may be on the cards yet????????
Any idea on price Jammy?

[Jammy]

For a pressure valve... about £80 I believe.

[markrally]

For a pressure valve... about £80 I believe.

No, i already got one of them along with the servo unit from my 97 cooper.
I meant the Kad pedal box, simple plumbing, no valves etc.

Mark :wales:

[Jammy]

Ah rite, erm, I'll have a look to see whether I got a pricelist with my catalogue...

[Jammy]

OK, adjustable bias pedal box - £160.38. They do master cylinders for the pedal box - £98.70. And a cable adjuster kit for the box - £33.31. All prices including VAT.

[markrally]

Do you know anyone with one? It doesnt look a lot too it really? If i had the measurements it would be simple to fabricate it really, well working in an aircraft factory does help!!!!!

Mark :wales:
Ps thanks for the price list

do the miglia or mini se7en boys run them???