forum.audiv8.com Foren English Audi V8 Forum Brake power adjuster

Heya. I'm going to have to replace all my rear brakelines, and the brake power adjuster wich gives more power to rear brakes when theres heavy load on the rear is pretty much broken. My question is simple:

If i just put a normal "T" connector there instead of a new adjuster, will there be too much rear bias on the brakes when car is unloaded? How much does this thing actually affect the rear brake power? Will it make the rear snap out when its slippery or something?

Thanks!

A brake force regulator actually has nothing to do with how much goods you are carrying in your trunk.
It is used to balance a brake force between front and rear axle. For example, when you are braking hard, a rear axle became very unloaded so there is an excessive brake force, wchich is delivered, where it needed moost - on the front.

Anyway this regulator is dropped by the factory from the later Audi with same brake system so it seems that there will be no negative consequences throwing out this thing, also some of the V8 owners noticed better braking, after doing this kind a procedure.

But is et legal. Not in Denmark.
It vil not pass mot.

Hi,

In Antwort auf:

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A brake force regulator actually has nothing to do with how much goods you are carrying in your trunk.
It is used to balance a brake force between front and rear axle. For example, when you are braking hard, a rear axle became very unloaded so there is an excessive brake force, wchich is delivered, where it needed moost - on the front.

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Sorry, but I don´t think so. The pressure at the front brake does not depend on any activity of the rear braking force regulator.

The brake force regulator is in fact responsible for levelling the pressure at the rear callipers, depending on the load of the car - not only in the trunk, but in the passenger cabin.

I guess it might be not be really advantageously to disengage or remove this regulator in any way. The rear brake might be working excessively when the car is less loaded. In this case, the rear break might lock-up the wheels earlier, only guarded by an even earlier interfering ABS.

If you have got some trouble with your brake force regulator: Renew it.

My suggestions was the same at first.....
But have analyzed some SSP manuals about this regulator and a brake pressure valve on the rear axle between right and left wheels, it\s a quite smart sytem, that mechanically ajusts brake bias between front and rear axle, dependig on how hard a brake pedal is pressed at the moment, and between rear right and left wheels during cornering.
Got stucked this thing at the top position one one of our cars, front brake pads wear was increased and brakes were often overheated, while rear brake discs was rusted, the brake testing machine was shoving enormously high front braking and no brakes at the rear, fixed this regulator and everything became just fine.

Hi George,

I know, that there are two brake regulators at the rear axle:
1st the braking force regulator (engaged by a lever and a spring in dependency on the load of the car)
2nd the braking force limiter (engaged by centrifugal force during faster cornering, to prevent locking of the inner curve wheel)

But I´m sorry, cause I can´t see the coherence of your front brake overheating and the braking force regulator. Rusty brake disks on the rear axle might seriously be caused by a braking force regulator malfunction. If the brake pressure is too low, the braking action is even too low. In extreme, the braking action is near zero.

But I see no coherence between the front and the rear brake, when the braking force regulator is defective, because the regulator controls only the pressure at the rear brakes.
Front break overheating is very often the result of tilted caliper pistons or damaged, respectively dirty / clogged master cylinder. In the last case, is it possible, that you have rinsed the dirt while bleeding the system after renewing the regulator?