53599 replies to this topic

[WillC]

Heya boys i'll add my 2 cents here..

The B4's ABS was the WORST thing ever!! if you were lightly braking, and managed to run over the smallest pebble on the road or even a coke bottle lid, it would set the ABS system off straight away.

I almost rear ended about 40 cars in 2 years cause of the setup.

HAHAHA MAN I thought it was just me... YEP the by brakes are temperamental AS!

[Scuba-Roo]

, I will ask the install bloke about that stuff.

O rly?

[Cam.]

You're busy with the rally jen-wun What days are you free? We will be installing the stuff, I will just ask his opinion. And...fend off any sony amplifiers he attempts to put on my order.

[B4TT]

shit abs system is the answer, all my mates that have owned Rex and Rex sti's have all complained about the same thing, it's another one of those Subaru quirks, like a 2nd that's as strong as a stale bread stick..

Perfect Answer !
I too have heard the same from WRX/WRX STi dudes... they hated it.
The way the ABS kicks in with the B4 is actually very dangerous sometimes as the braking is reduced massively when the ABS kicks in and just doesn't slow up fast enough.
As Brendan said, you don't have to be speeding or hammering the brakes for it to kick in.
It feels like your skating over ice or something when it happens. foot is firmy on the brake but all your getting is a pulsating pedal and fuck all braking force.

[Scuba-Roo]

You're busy with the rally jen-wun

What days are you free?

We will be installing the stuff, I will just ask his opinion. And...fend off any sony amplifiers he attempts to put on my order.

and the geetea wannabe jenwun.

i'll let you know how tomorrow goes cause i got overnight tonight

[Cam.]

and the geetea wannabe jenwun.

i'll let you know how tomorrow goes cause i got overnight tonight

It's cool, Get your car stuff sorted

I went in to JB and the installer said the 6inch splits will fit in the front doors and the tweeter will fit behind the stock grille (he said i can bring them back and exchange them if that wasn't the case)

So all the bits are picked

[Scuba-Roo]

Sweeet, so were doing front and rears and the sub?

[Cam.]

Yep, And the headunit. All the bits are bought, Except for the speaker wire and ground wire for my amp (I think that's all i need) Sony headunit (I said i wouldn't go there....But he did me a good deal) VDO dayton splits - front Sony coaxials - rear And a kicker sub

[skillionaire]

Just have to also add, B4 ABS is terrible. Scary in some instances.

[Scuba-Roo]

Yep, And the headunit.

All the bits are bought, Except for the speaker wire and ground wire for my amp (I think that's all i need)

Sony headunit (I said i wouldn't go there....But he did me a good deal)
VDO dayton splits - front
Sony coaxials - rear
And a kicker sub

lol my DD linears will kill it

sounds alright though

[Delete This Account]

Just have to also add, B4 ABS is terrible. Scary in some instances.

Yes, yes it is!

Definately doesnt take much to set it off!

[Cam.]

lol my DD linears will kill it

sounds alright though

I know they will

But it will do the job

[RX25SE]

This ABS thing seems very odd. I've never heard this about any other car. Going on whats been said, the B4 would pi$$ me off with brakes like that. Has anyone heard of a fix for it?? Usually ABS assists braking, not makes it worse!! Does the B4 have EBD?

[B4TT]

This ABS thing seems very odd. I've never heard this about any other car.
Going on whats been said, the B4 would pi$$ me off with brakes like that.
Has anyone heard of a fix for it??

Usually ABS assists braking, not makes it worse!!
Does the B4 have EBD?

Nah, just a poorly functioning ABS unit, no other fancy controls added to it.
Some auto's may have had VDC I think? but yeah the manuals got nothing.
I would be keen to know if there was a good fix

[RX25SE]

Strange..... Did a bit of digging around in the workshop manual and as far as I can tell the only difference in the braking system between a B4 and a RX is larger dia from discs, all else inc the ABS unit is the same. The B4 only has a 20mm increase in mean disc dia and I can't see this being the cause.......could it?

[buzzda]

Strange.....
Did a bit of digging around in the workshop manual and as far as I can tell the only difference in the braking system between a B4 and a RX is larger dia from discs, all else inc the ABS unit is the same. The B4 only has a 20mm increase in mean disc dia and I can't see this being the cause.......could it?

SUBARU put them on his RX and reckons they work fine...

does the RX have individually controlled front wheels?

One thing that caught my eye in the tech. desc. was "Braking is designed to be more progressive between th hard feel of the WRX sti and the softer feel of the Lib RX"

[B4TT]

No wonder this guy is always in the media for sex scandals LOL

[RX25SE]

SUBARU put them on his RX and reckons they work fine...

does the RX have individually controlled front wheels?

One thing that caught my eye in the tech. desc. was "Braking is designed to be more progressive between th hard feel of the WRX sti and the softer feel of the Lib RX"

Yeah Chris said they worked really well.

Almost all cars individually control each front wheel. Some have 2 sensors on the rear (one each wheel) but only one brake line to the ABS unit, this is a 3 channel system. Others also have 2 sensors but two lines to the ABS unit, this is a 4 channel system.

As far as feel goes, I wonder what was done to change the feel? The dia of the hydraulic cylinders appears to be all the same.....pad compound???

[RX25SE]

No wonder this guy is always in the media for sex scandals LOL

Hahahahahahaha
Cant see KRudd doing anything like that!

Seriously, poor behaviour from a head of state.

[buzzda]

Maybe the 2-pots? or do the RX have them aswell?

Alot of dribble but you might be able to make something out of it
BRAKES
The braking system features high capacity four wheel discs and
the traditional diagonally linked interior piping system with pressure
control valve for greater braking power, safety and reliability.
The diagonally linked split system means that if one circuit of
the brake hydraulic system should fail then braking is retained
in the remaining circuit on opposite corners of the vehicle. This
results in the vehicle pulling up under control without any violent
lurching to one side, which can occur on vehicles that are split on a
front and rear basis. The interior routing of the brake pipes also
means that there is less likelihood of damage or fracture of a pipe
when driving in rough terrain whilst corrosion of the brake pipes is virtually impossible.
A front and rear pressure control valve is also used to balance the braking force to the weight distribution of the vehicle.
The front brakes have 294mm diameter, ventilated discs with heavy-duty twin piston floating callipers. While on the rear 290mm
ventilated discs with single piston floating callipers are used.
A vacuum suspended tandem booster provides power assistance with an effective diameter that has been increased from 180 + 205mm
to 205 + 230mm for reduced pedal effort but retaining a firm braking feel. Maximum braking force from 100km/hr is 0.99 G with a stopping
distance of 39.4 m. Braking feel is designed to be more progressive, between the hard feel of the WRX STi and the softer feel of the
Liberty RX.
A . B . S .
ABS braking is standard and features the very latest state of the art Bosch 5.3i system made under licence by Nippon ABS.
It is a full four channel three-phase four-sensor system with the front wheels being controlled individually and the rear wheels controlled
jointly through the select low method.
This new system features a much higher level of wheel speed control operating the
three-phase control cycle with an increased clock frequency up from 12 MHz to 18MHz
and a ROM capacity of 32KB up from 12KB. The result is a higher level of stability when
braking on road surfaces of different levels of grip either side of the car. This has resulted
in the level of ‘Yaw moment’ (rotation about the centre) being reduced by approximately
50% under test conditions when one side of the car is on ice and the other on an asphalt
surface. The necessary steering angle correction therefore has also been reduced under
the same conditions by one third.
The select low method uses the rear wheel with the lower coefficient of adhesion to
determine the brake pressure applied to both rear wheels. This select low control, along
with electronic delayed build up of braking force at the front wheel with a high adhesion coefficient and negative steering roll radius,
minimises the tendency for the vehicle to turn about its vertical axis (spin) when braking on uneven road surfaces.
TECHNICAL DESCRIPTION 1 8