Brake Bias
Turbo Mini Forums

I was going to continue this in the wanted section, but though it warrented a new thread.

How have people piped up their brake bias valves?

We have the non servo duel system master cylinder. Obviously one of the outputs goes to the front and one to the back via the limiter valve thing. I have 3 questions.

1. Does the master cylinder have 2 bore sizes inside it?
2. Is it realy as simple as removing the limiter valve plumbing one output to the front and one to the rear, then add a bias valve in the rear line?
3. How have people done this? Using a duel or single circuit master cylinder?

Cheers

Ben

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

1) Not sure never dismantled one.

2) Yes. This is how I did it on my old Clubman Estate. Think of the early single line cars, this is how they do the rear brakes as well.

3) I did it with a split front/rear master cylinder.

1. Some are, not all. I think the only type you can get now, is the twin bore ones. It's easily to see on the outside of the casting if they are single or twin bore.

2. The one you want to buy is rubbish. Get a simple inline one and fit to the back circuit. On my car, the front circuit runs directly to the fron wheels. and the other directly to the rear subframe. No silly big heavy shitt reducer on the bulkhead.
This: http://www.demon-tweeks.co.uk/products/Pro...RT&pcode=RIX837

3. Dual

Well that has made my mind up, seems a much better way than that thing on the bulkhead, it may save weight too. It will take a bit of tuning I guess, but we can manage that.

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

so you use them instead of the bias?

its one inlet and two outlet (one direct to the front and one direct to the rear)????

if so im up for one.

I've done what vegard said, but got mine from rally design for cheaper than that

Team Racing

The master cylinder is a later type twin bore one (with the yellow tag).

Are both bores the same? so it dosen't matter which one goes to which end. I couldn't work it out from the haynes manual.

Wil

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

The ones with the most pressure goes to the front. Forcexarea isn't it? :)

I have used the exact valve shown the the demon tweeks link posted by Vegard above. Does a cracking job.

You may be suprised at how much difference it makes once you get the rear brakes actually doing something to earn their keep.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

Excellent, and with the £20 you have saved over the standard cast iron hunk of junk you can buy us all a pint.........

LOL

Edited by Vegard on 8th Feb, 2006.

Wil, here is a photo of mine

The inlet is on the bottom, outlet on the top, but it can be used upside down.

Team Racing

I don't think I can mount mine there, I'm sure the Blue Book says it can't be adjustable when driving. I'll check though, that might just be anti-roll bars.

Master cylinder - top to rear, bottom to front , cheers Vegard

wil

Edited by wil_h on 8th Feb, 2006.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

Mine:





I've mounted mine on the rear subframe. Out of sight, but quite easily to adjust. I'm not allowed to reach it from the seat either. Another possibility is to mount it on the bulk head.

So, top to front, botton to rear?

Now I am confused

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

Wil, can you check in the blue book for me please? would like to know if mine is ok or not

Team Racing

top, with the smallest area to front, when you have a small area you make more pressure. so lower to rear, and top to front

Look on ebay for those valves. I got a wilwood one new from the states really cheap. Postage is peanuts. Mines the infinity adjustable type, basically the same as jims but a newer model. Was about £35.

One of these looks good to me. I love the guys respons to is it a wilwood unit.....

http://cgi.ebay.co.uk/BRAKE-BIAS-PROPORTIO...1QQcmdZViewItem

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

Yep looks good to me, good price too.

I got a twin master,The rear pipe is split into 2 then go's into a twin cylinder adjuster valve of a mk5 escort van(found on the rear axle) then to the brakes left and right. so I have adjustable side to side too

Metro turbo weekend driver,Mini turbo in the making again!

Why would you want them adjustable side to side??

for quick turn arounds?

why dont you use an old style master cylinder (bean can) and then just run a t piece?

Like this?? :)
I just love sharing photos don't I ?