Hydraulic handbrake

[L14MNP]

not for my Nova - but same deal

Right I want to fit one of these to my Nissan, purely for the reason that I have a spare set of alu GTR front 4 pots and was gona run them on the rear with 280+ discs and a brake bias valve, I know I don't 'really' need them but I think it will look cool, and also stop awesome - should lol

I will know more when I drop the rear beam shortly to polybush / powdercoat it

So, obviously you can't connect handbrake cables to a front caliper (Xantia excluded lol) hence the idea for the hyd handbrake, not to mention it would be far superior, but I've been reading up and apparantley it's only legal if you still have the cable backup, which I wasn't going to.

Apparantley it's unsafe, my mates Kangoo is fine :confused: I was just going to replace the OE lever with the hydraulic one/master cylinder and T-piece into the rear brake pipes. It wont even pass the MOT apparantley if it has a seperate hydraulic circuit :(

Anyone know the score on this?

So my new plan is to run 2 calipers on the rear, use the OE solely for the handbrake and adapt the hub to accept a front caliper on the opposite side - or wherever. I was going to do this by making another adapter plate which will space the OE caliper further from the hub thus allowing larger discs, and to run the front caliper on the rear I intended to cut off the mounting points from a scrap primera hub and weld them to the rear hub - my dad is a very good welded, so I should be safe lol - then I should be able to fit the discs under both calipers, maybe 280/300. I think the fronts are 330mm - they are from an r34 gtr and the calipers are r32 gtr.

Reckon this should be OK? Was just going to t-piece the rear hoses for both calipers, unless there's a better thing to do? And as said above, install a bias valve so the rear doesn't try and overtake the front lol

Mostly it is for I'll admit, asthetic reasons, my RL7s swallow even my 4 pots, so imagine how tiny the rear looks!

Any advice greatly received, don't tell me to fcuk off to the primera OC - they are idea theiving w4nkers lol :thumb:

[Bouch]

I think that the parking brake has to be operated mechanically(either cable or rod) so that theres no chance of the car rolling off if theres a fluid leak in the braking system.
The works mk2 escorts use to use two calipers on the rear. One for brakes and one for parking. They were mounted opposite end of the disks, so it is do-able.

[L14MNP]

Thanks Bouch, appreciate it the help!

Just thought - may have owned myself.....

The 4 pots on the front with them being from a skyline, would the surface area of the pistons on them be equal (or near enough), to the piston on the standard calliper - hence using about the same amount of fluid? <- that is probably BS as the caliper itself is obviously larger so would use more fluid :( hmmm

I haven’t looked into this yet... but as I mentioned I was wanting to run 4 pots on the rear solely for foot brake purposes and I assume that the piston in the original rear calliper would be smaller still than that on the original front calliper. Again I haven’t checked yet, but I’m assuming that adding another 4 pot calliper to the system is going to require too much fluid for the original master cylinder? Will I need to upgrade this also to a double etc?

Cheers for reading!

I'm really looking to get this done as soon as possible - so thanks for the advice in advance!

[L14MNP]

Also, would I be able to fill the OE rear caliper with brake fluid and then seal it? After all it is only for holding the car when staionary. This would save me adding yet another set of calipers to the system... I do like to make things hard for myself at times lol

[L14MNP]

More info lol - who knows, maybe someone may wish to do this also :thumb:

http://www.d2racingsport.co.uk/Pages/newsevents.asp

at the bottom of the page, it shows the new d2 6 pot rear that is designed to work in conjunction with the fronts, now you aint gona change your servo / master cylinder for those I wouldn't think? Also, can't see it having any handbrake cable connection?
I emailed the the UK dealer for D2 but they are **** - couldn't even get me the coilovers last year ffs - I may have to wait until they release more info :(

[Bouch]

Personally i wouldn't go for big brakes on the rear. When you brake, all the weight of the car is throw to the front, making the rear very light and having big anchors on the rear would just lock the **** end all the time(which would be frightening to say the least!!). Yes(as you suggested above) you can fit a bias valve. But you'd have it screwed in so far that you may aswell have a smaller set-up. If your only using the car for show purposes i can understand it, but other than that, i wouldn't bother.
As for the master cylinder; you should be ok with the standard one because you'll be braking the rear end at a lower pressure(read below) that the standard set-up and therefore using less fluid.


1 bar of pressure on a piston with a cross sectional area of 1cm would lift one kilo.
0.33bar of pressure on three pistons with cross sectional areas of 1cm would lift one kilo.
3bar of pressure on a piston with a cross sectional area of 0.33cm would lift one kilo.

I hope this make sence.
Bouch

[L14MNP]

Yeah makes Sense mate - nice one

Mostly for show purposes TBH but will see some road action

i'll give it a shot shortly, what's the worst that can happen lol

[bump]

i'll give it a shot shortly, what's the worst that can happen lol

Lose the backend and spin into a tree?