DIR Return Create A Forum - Home
---------------------------------------------------------
Old Leafsprung Land Rovers
HTML https://ollr.createaforum.com
---------------------------------------------------------
*****************************************************
DIR Return to: Technical tips & Questions
*****************************************************
#Post#: 89106--------------------------------------------------
Brakes, question for,
DIR By: Roveerman
Date: June 7, 2014, 3:08 am
---------------------------------------------------------
How are we measuring the ultimate performance of our brakes?.
Most of the times I've been to testers they bugger off with the
land rover with a tapley box (think that's what it's called) and
come back and put a tick in the box.
I know that everyone is saying "more power" in terms of servos
and g valves but I do know of at least one motor viehical that
was supplied from the factory with a disc drum set up that did
not have any servo fitted, how did it manage to work? Quiz time
there motto was "safety fast".
Does every brake system have to be twin line? Or can we achieve
a safe system with a single line system?
I know that the twin line system was developed as a safety
measure, if one line sprang a leak the other would still stop
you
Do the master cylinders on twin line system develop different
pressures (at the output ports)?
What is the line pressure developed at the front callipers by a
proper safe system?
Her to learn not argue
#Post#: 89107--------------------------------------------------
Re: Brakes, question for,
DIR By: Roveerman
Date: June 7, 2014, 3:16 am
---------------------------------------------------------
These may seem stupid question but not all of use can just bolt
in whopping great servo towers, I own a series one and the
bonnet line is lower, if anyone has got pics of a s1 with all
this stuff in i would like to see.
#Post#: 89110--------------------------------------------------
Re: Brakes, question for,
DIR By: divie
Date: June 7, 2014, 3:31 am
---------------------------------------------------------
Surely a servo does not improve braking, it just lessens peddle
pressure for a given amount of stopping pressure at the drum. In
my case I have always had good brakes on my Land Rovers and put
this down to correct and careful setting up. It is essential to
use decent linings like Mintex, with so many threads on poor
braking and problems I put it down to many previous owner bodges
and incorrect reassembly. It is peoples inability to get them
right that give poor braking, with 11" drums up front my motor
braked well and always a good peddle. When I am once again
allowed to drive after some health issues I will buy another
series and do not think there will be problems making it stop.
#Post#: 89111--------------------------------------------------
Re: Brakes, question for,
DIR By: Roveerman
Date: June 7, 2014, 3:37 am
---------------------------------------------------------
This is an aside from fuckwits thread and there he is mainly
dealing with disc mods for series landrovers so these are asked
on premise that discs are fitted
#Post#: 89116--------------------------------------------------
Re: Brakes, question for,
DIR By: guest13
Date: June 7, 2014, 4:54 am
---------------------------------------------------------
I use a tapley meter to check my brakes, come MOT time it goes
on the rolling road
I fail to see the need to alter the brakes, standard 10" drums
will brake hard enough that the tyres run out of grip, at that
point it doesn't matter what brakes you have. Exceptions being
doing lots of off roadwork in water, or maybe towing in a
mountainous area, where bigger brakes may help prevent brake
fade - but either could be cured by driving properly, and using
the standard brakes
You don't need twin line, but it gives you some stopping power
if you spring a leak - I wouldn't go fitting it if I didn't
already have it
I think the LR twin line MC will develop the same pressure in
each line, as the pistons are the same size - it should be
possible to generate different pressures by using different
piston sizes, but can't say I've seen it done.
I've no idea what pressure the system is operating at
#Post#: 89119--------------------------------------------------
Re: Brakes, question for,
DIR By: Roveerman
Date: June 7, 2014, 6:03 am
---------------------------------------------------------
With a 200tdi fitted running 3.54 diffs I can break the nation
speed limit and then hauling it back down to a stop in the wet
or full of mud repeatedly WILL challenge drum set ups.
So discs it is.
In the end it comes down to the line pressure in the brake
system and balancing it between front and rear, how you get
there is another thing.
#Post#: 89133--------------------------------------------------
Re: Brakes, question for,
DIR By: guest13
Date: June 7, 2014, 8:18 am
---------------------------------------------------------
No it doesn't, it comes down to grip between the tyres and the
road - when you reach the limit of that, you can have as big
brakes as you want, it will do no more
A standard series can do 70mph, and stop adequately - it's
maximum weight remains the same whatever engine you have, as
does the max speed - thus you have no more energy to dissipate
If you were to do multi 70-0 stops one after another I wouldn't
argue, disks will cope better - but when d you envisage ever
doing that
#Post#: 89134--------------------------------------------------
Re: Brakes, question for,
DIR By: Roveerman
Date: June 7, 2014, 8:38 am
---------------------------------------------------------
Living and playing not far from Cumbria doing multiple stops
down 25% gradients soon test drum setups, ever been down the
struggle? Fun behind a numpty who thinks it clever to try with
a caravan in tow.
#Post#: 89146--------------------------------------------------
Re: Brakes, question for,
DIR By: guest13
Date: June 7, 2014, 12:22 pm
---------------------------------------------------------
Yep (though I had to google the name to find which road it was),
and never ha an issue - but then I haven't driven any of those
roads at speed, surface condition and visibility limit how fast
I would go, to that well bellow anything to challenge the
standard brakes ability
#Post#: 89148--------------------------------------------------
Re: Brakes, question for,
DIR By: Roveerman
Date: June 7, 2014, 12:38 pm
---------------------------------------------------------
Hi 5988, I'm not trying to say all drum setups are bad, I did
ask these questions in fuckwits thread on how to do brakes and
was told not to hijack his tread, I would still like these
answered not just told "nothing wrong with drum brakes" or "this
is the only way to do it".
I'm trying to understand the theory behind all this. The easiest
way to solve all this would be to buy the complete set up from a
disc/drum 90" as landrover will have spent more money than I
could ever earn developing it.
As stated the bonnet line on a series one in lower than later
viehicals so I'm not sure a 90" brake tower will fit.
If it can be shoe horned in I'd like to see the proof.
*****************************************************
Page 1 of 4
DIR Next Page