Valver bias valve

[Dean]

iv lowerd the back of my clio quite a bit about 80mm

and havent adjusted the rear brake bias valve, but havent been driving it, il be starting to dirve it soon, and want to ajust it properly, i know where abouts it is, but dont know what i need to do etc

can any one help?

 

[cliosportcraig]

Its probably better to have someone proffesional look at it !

 

[Tom_16v]

You should have looked at it before you lowered it.

& I dont theres enough adjustment in it with a -80mm drop.

Best to let someone who knows their stuff look at it.

 

[DeanRSi]

yeah, with an 80mm drop i dont think its long enough to be adjusted. what you should do is check the postion of it before you lower it so that after you lower it you can see where you have to put it back to. i think you can put in a longer bolt and adjust it like that, im sure someones done that before

 

[Dean]

hehe, well i used weights guide, after all the steps it then tells you to look at the valve

i know i wont be able to adjust it enough to solve that sort of drop but iv got 310mm brembo 4pots up front, so i was hoping that will bring the balance back a little?



if any 1 has used a longer bolt, or has any pics to what they have done can u show me please!

cheers D

 

[BenR]

Renault use a pressure gauge on the rear calipers to check, but all you need to do is make sure the fronts lock before the rear, unless you like it the other way around.

Get under your car and check it isnt seized first, you should be able to move the paddle by hand through its 1" or so travel. Get in the car and do a brake test and see which wheel lock up first. If its the rear, undo the 2 bolts on teh thread which lock against each other and wind them out till the spring tension is relieved and work from their on either increasing or reducing the biast to the rear. Tighten to increase rear bias, loosen to reduce.

Its not hard, just set aside an hr or 2 to get it spot on.

 

[JAY172]

to correctly adjust them you fit a brake fluid pressure gauge to one of the front calipers and one to a rear caliper.you apply pressure to the brake pedal until the front gauge shows a pressure as stated in the workshop manual.the manual will then give you a pressure that the rear gauge should show.adjust the valve rod until the rear gauge shows the correct pressure.if you can get hold of some pressure gauges i can post you the pressures from a manual.

 

[BenR]

who has time to do that with a full tank of fuel and driver weight lol.

I increased the rear preassure on mine as it works better on track.....can get tricky on the rd int eh wet though....go slow haha.

 

[JAY172]

it doesnt take long. the gauges just fit in the bleed nipple holes.the only trouble is that you cant jack up the car when adjusting because you would alter the gauge readings.you would need to do it over a pit or on a flat bed ramp.

 

[weight]

i used trial and error on mine

as ben said take it out in the wet and do some emergency stops and make sure the fronts are locking before the rears.

now take it easy, because with mine the rear was locking first and that is damn right dangerous when braking hard into a corner! trust me on this lol.

 

[BenR]

not many people have access to the gauges though.

 

[Dean]

i lowerd the rear of my saxo 100mm

i found out how dangerouse it was when i spun it over a junction at about 80mph lol

got out ok just f**ked the zorsts and sideskirts mad!

i only dabed the brakes 2!

il do what ben says, i dont have acess to the pressure gauges, and the car is so low i cant get under it or anywhere near it! without jacking it up!

cheers for the help, if i was to leave it, and the fronts where locking first would i get better braking when its not wet?

 

[BenR]

youll get safer braking........if you lock it youll go in a striaght line.

I set mine up to work with load transfer on corner entry so that you can control the tail with trailing brakes.