Mad Matt

iTrader: (2)

OK guys I have got APs all around (285mm 4 pots gr.A gravel specs at the rear, and 315mm at the front), gonna keep the std braking assisted system, but still need handbrake

So would it be possible to let the std calipers as "handbrake" and the APs as normal brakes or is there a place to buy separate caliper for handbrake use only ? I remember I saw that from AP somewhere there

Or is it possible to somehow add the hydraulic handbrake somewhere in the rear brakes circuit ? I guess yes only if you go bias pedal box, and as I'm not, I guess its not possible.

CheeRS

brad

If you modify a hydro by fitting some sort of ratchet on it you should be able to plumb it in without a bias box and still be able to pass the mot .

Mad Matt

iTrader: (2)

Well problem is that I live in Switzerland and I cannot fit an hydraulic handbrake. I can't even fit the AP brakes, so when I'll have the MOT passed, I will put the gr.A APs, and hydraulic handbrake, but unsure about the way I should use to connect it as I don't have bias pedal box !

Rs1

iTrader: (1)

iirc Reyland do a kit to run the seperate caliper for hamdbrake use, maybe worth dropping Martin a pm about it.

Mad Matt

iTrader: (2)

But can I blank one of the rear port, then add the handbrake with the limiter on the second rear port, then a T after the handbrake like this :



I don't intend to use ABS.

Twellsie

iTrader: (1)

http://www.rallydesign.co.uk/product...oducts_id=8312

Mad Matt

iTrader: (2)

Sounds good, have you got that system yourself ? How is it mounted, I cannot figure out where it is attached ? :S

Twellsie

iTrader: (1)

i have not got it my self, but i would imagine could be made to fit with a simple bracket, its not under much load so a simple sheeet metal braket would sufice

Mad Matt

iTrader: (2)

Yeah well I will try to sort out something from that, I have to measure the thickness of a rear 285mm AP disc and if it does fit I hope that little mechanical caliper can stop the wheels even at 20-30mph !

nilrem

mate, dont use that if you want a fully functioning hydraulic handbrake as its too small and would just rip straight out with a sheet metal bracket...

just put the hydraulic handbrake in line with the standard brake lines.

just follow the diagram above, or fit a "T-piece" to merge the 2 lines into 1. also run a bias valve in line with it. you dont need to run a pedal box to run an in-line hydraulic brake.

let me know if you have any problems chap! the rally boys over here do it all the time without a pedal box!

Mad Matt

iTrader: (2)

Aaaaah great nilrem, that's what I wanted to know ! Yes I will use a T to merge the 2 rear lines into 1, then the bias valve, then the hydraulic handbrake, and finally a T to split the line to each rear wheel.

Do you know which cylinder size should I use for the hydraulic handbrake ? I have gr.A APs 4 pots 285mm rear brakes, I would say 0.625 but is it right ? Also do I have to get braided hoses, or can I use solid hoses as much as I can ?

nilrem

either braided or soid, it doesn't matter much. most round here are opting for the braided route, but its more expensive and you wouldn't notice the difference on the road to normal solid lines. 0.625 seems to be ok on most cars i have seen. not had experience with those size of rear cylinders though. PM "NUTS Rs" he is a fountain of knowledge mate!

dont know what the laws are over there, but in the uk you need a cable handbrake, so that small brake calliper above is what thats used for.

hope you can get it sorted chap!

Mad Matt

iTrader: (2)

Ok well I will go the 0.625 route I think, and solid lines.

The law here is simple : no modifications allowed until you have the TUV homologation available for it. Converting to hydraulic handbrake is not allowed, as is using group A brakes (try to find a TUV homologation for Switzerland ). I have to pass the MOT test first, then I'll put the rally parts. Yeah Switzerland is not really nice to live for a modified car !

NUTS RuS

iTrader: (35)

0.700 for the rear cylinder. Your discs should be 20.6mm, and you can use solid lines thats fine.

The spot caliper above is a parking brake not a handbrake, and is similar to the ones we do but ours have easier mounting points.

It will NOT stop the car if its moving, even at 20-30mph.

You apply the parking brake only once the vehicle is stopped.

Am i right in thinking your wanting to run the two systems from 1 lever Matt ? Hydraulic and cable ?

Mad Matt

iTrader: (2)

Thank you for the added precisions mate !

No, I will just use hydraulic handbrake, no cable. I will go to MOT with std brakes (in fact, pretty much std car) and I will put my rear early specs group A rear beam with group A brakes and billy coilovers, and at this time I will remove the std handbrake and will fit the hydraulic setup

BriB

NUTS RuS can you post a pic up of your parking brake calipe please.

Brian

NUTS RuS

iTrader: (35)

So if you are changing it all after MOT why do you need a parking brake now ?

The standard Cos 4x4 rear caliper will be ok for you until after the test

NUTS RuS

iTrader: (35)

Its on the website Bri,

http://www.compbrake.co.uk/COMP%20R3...Mechanical.htm

Im on my wrong PC for getting pictures, but if you need them I can get them when I get back

Mad Matt

iTrader: (2)

Ah I think I misunderstood your question mate. Nono I will just run 1 caliper at the back (the group A one) which will be used also as the handbrake caliper, and I won't have any parking brake !

ian sibbert

Matt,

No disrepect pal, but why do you need a hydraulic handbrake? Unless your doing some serious competition and by that I mean a technical rally style circuit/stage when will you ever need a hydraulic handbrake?

In most track day environments the use of a hydraulic handbrake is never apparent, and given the fact that i'd doubt your car has any form of handbrake release doing a handbrake turn without being fully aware of the mechanicals could cause damage thats assuming your still running 4WD.

Make life simple for yourself, put the AP's on the rear and design and fit a mechanincal adaption of the standard cable arrangement. The pads in the AP's can generally be made to accept a cable, through the upper portion of steel backing left above the pad area, suffcient to apply as much pressure as all the spot calipers above (thus satifying your parking brake needs)




and if you still feel the need to have a hydraulic handbrake plumb one in-line.

NUTS RuS

iTrader: (35)

UK SVA test says the caliper must be a seperate caliper Ian and not part of a hydraulic system which is why products like that are around.

UK MOT rules will pass what you (and we do) not sure about in Matt's country though.

Matt is building a GpA rep, so I guess he's thinking if they had it he wants it too ?

Mad Matt

iTrader: (2)

Again, I do not have to care about MOT because the car will be prepared after the MOT test so basically I can do whatever I want, thing is it won't be homologated, but quite a lot of people are doing this in Switzerland, because there is just NOTHING you can legally do on the cars.

Now I see what you mean Ian with the picture. I didn't think it was possible, yes I don't need a hydraulic handbrake, its just I didn't know I could add a mechanical cable like on the picture you posted. I haven't got H/B release of course, will play with the clutch and the lever when I need it to turn !

BriB

Thanks for that

Brian

Puss2

iTrader: (5)

Or these are another option brembo handbrake calipers

BriB

Puss,

Where are they from? I know they are Brembo, but who sells them and how much?

Any more pictures?

Regards

Brian

Puss2

iTrader: (5)

I got mine from e bay think i was lucky to find them.
As far as i know there normally found on the rear of lambos,ferrari ect

As for how much im not 100% but i heard Ł190 each (unles someone else knows different) mentioned although i didnt pay that much

NUTS RuS

iTrader: (35)

I know different Puss, that price is a little out as they are less than that lol

More pics of the others I have BriB






Look like this when fitted



But are much bulkier and heavier than the spot calipers.

Puss2

iTrader: (5)

Tony it was only a guess as when i was searching for them some one quoted that price.
Those ones look smart