Rear brake bias

[gazpowells]

hi

I would like to run my car without the ABS but have a problem!

have just unplugged the sensors so the ABS will not work, just went out for a drive and there was to much rear brake bias   
couldn't brake hard coz the the rear just kept locking up...

the car is a  mk3 16v which i believe the brake bias is controlled via the ABS system..

so how do i control rear bias,  do i have to fit an inline valve into the rear brake pipes? or is there any other way around the problem?

thanks in advance 

   

[Paul86S2]

Try some better pads in the front and standard ones in the rear.

I run mine without the abs, mintex 1155's on the front and standard on the rear. My car has all the weight taken out of it and its really light on the back and it brakes fine.

Worth a try before you start messing with bias valves etc.

Paul

[Diamond Hell]

If you're going to fit a bias valve you need to appreciate what you're in for: A complete re-wire of the braking system. 

I only fitted mine because I had to re-do the whole back end of the car anyway.

Your car should currently have diagonal-split brakes, for safety. 

If you fit a bias valve then you're wiring the two front brakes into the two front ports of the master cylinder and then both rears on to a single port on the rear.

Totally different.

[gazpowells]

Try some better pads in the front and standard ones in the rear.

I run mine without the abs, mintex 1155's on the front and standard on the rear. My car has all the weight taken out of it and its really light on the back and it brakes fine.

Worth a try before you start messing with bias valves etc.

Paul

have you taken the abs pump out mate or just removed sensors?

[Paul86S2]

I just pulled the fuse.

The abs didn't work before and it comes up with a pump fault on vagcom.

Removing the sensor wires will have the same effect.

Paul

[gazpowells]

thanks  paul

i would like to remove the ABS pump, so i think i will change all the pipes and fit a bias valve

any advice about doing this before i start 

[gazpowells]

If you're going to fit a bias valve you need to appreciate what you're in for: A complete re-wire of the braking system. 

I only fitted mine because I had to re-do the whole back end of the car anyway.

Your car should currently have diagonal-split brakes, for safety. 

If you fit a bias valve then you're wiring the two front brakes into the two front ports of the master cylinder and then both rears on to a single port on the rear.

Totally different.

thanks mate

think i will change all the pipes, should i fit 2 bias valves or just 1 and blank off the 1 rear brake pipe coming out the master cylinder?
im assuming the cylinder has 4 ports 

 

[Diamond Hell]

Blank off the port and fit one, or you'd never balance it out.

[gazpowells]

I had a look at removing the ABS pump last night and the master cylinder only has 2 ports not 4

so do i just use the front port for the front brakes with a t peice in it  and the back port for the rears

or should i change the master cylinder?

thanks guys

[Diamond Hell]

One port for the fronts and one port for the back, with the bias valve reducing the flow to the rears.