Diagonal Braking Systems

[lexsmaz]

I have never fittted one & dont really see the need for one but as The Real Roadrunner said i would fit it to the rears as well, you need to stop brake pressure going to the rears when you have your foot on the brake & your doing your exciting burnouts ... also if your locker sits above the master cylinder you probably have air trapped in the line ...

[Pure_In_Sanity]

Daniel, Maybe you had a little air in the system previously, which was just limiting fluid pressure to the rear?
With the hilux diff / brakes in the rear, & standard brakes on the front; I'd imagine there'd be a little more bias to the rear.

A possibility?

Cheers
Phil

[stradlater]

Phil,

You are correct mate, there was bias to the rear even before i put the line locker in.

However, the air in the lines thing was quashed some time ago when I took it to ABS and they bled the whole thing and went on a mission to try and figure out why it was wrong.

So basically their answer was the put an adjustable brake bias valve on the rears so that they could lower the amount of bias to the rear and force it forward.

All that's done is made the pedal SUPPPERRRRRR Fucking hard. Hence why I dont' think it's really the solution to the problem.

I need to have access to someone who has the ability to bend brake lines and then I can re-do part of the system. That way I might actually get something to work.

[madmont]

Range Rovers had 2 brake lines to each front caliper and one to each rear caliper so if you lost one circuit you still had both front wheels braking and one rear still working.

[twentyEight]

OK, you had too much bias at the rear before you put the Line Locker in...

How much more did you get at the rear when you put it in? (Rough percentage)

[Pure_In_Sanity]

Well thats interesting, I added a bias valve to my rears when i upgraded to MA70 disks, and have a super fucking hard pedal too. I just put it down to the MA70 master cylinder i fitted at the same time.
Maybe its something caused by the valve.

Meh, matches the hard clutch pedal for now.

[stradlater]

That is interesting. A wilwood one?

I've just put an ma70 master cylinder in mine too... Will be interesting to see how it goes.

[brett_celicacoupe]

so does it actually hold pressure like it should? they should only hold pressure one way.

i fitted a B&M one to the soarer in the rear line, to keep pressure out of the rear line.

[stradlater]

so the way you fitted on the soarer, is it fitted in reverse?

As in, the out goes to the front of the line and the in goes to the back?

Mine still holds the pressure fine, I just hit the brakes, press the button and bang the gas.. Works wonders.

[brett_celicacoupe]

yeh well the B&M locker is mainly designed to lock pressure in for the drags etc. i wanted it so i can isolate the rear circuit and do a skid to impress the ladies.


basically i just connected in reverse to what they said. all their diagrams seem to be suited to holding pressure in

i can check it out on mine and make sure your is opposite, take a pic of yours if you want

[stradlater]

I've done the checks on mine. Mine's the right way in, cos it works.

I just always figured that you'd have to have the thing in reverse to get the 'lock off' effect rather than the 'lock on'.

Still thinking about changing it, but I dunno..

[Pure_In_Sanity]

Yes, identical to a wilwood one.

[clubagreenie]

Range Rovers had 2 brake lines to each front caliper and one to each rear caliper so if you lost one circuit you still had both front wheels braking and one rear still working.

Indeed. The master cylinder sat on a slight upward angle (to the front). The resovoir had 3 chambers, rear (at the rear), front was common but had a divider so that fluid lost in one would keep some in the other. Unless of course you're me and jam a tree in a wheel and take out both lines necessetating driving home from the backwaters of Lithgow (across the mountains) on just rear brakes.

Later non ABS range rover models kept two circuits as did discoveries with abs, while discoveries without abs had one circuit.

The rangie master cylinder is a fairly compact (for it's design) unit and cheap (for a rover part).

It has always confused me though why some systems run the rear line down the passenger side of the vehicle, crossing the engine bay with line, often the proportioning valve over there as well, down the back and them back to the middle.

[stradlater]

Would that be because they were originally 'other hand drive' cars and everything was on the other side?

[twentyEight]

I think the bias difference is just because of the size difference of the rear drums...

I couldn't see the Line Locker having too much of an effect the bias... (Providing it's fuctioning correctly...)