Abs Working Too Much ? R33 Gts-t

[conan7772]

I've had an, R33 GTR Brembo kit installed onto my Series 1 GTS-t.

Using ELF HTX115 dot 4 fluid and Green Stuff pads, it certainly pulls up better but still you need to put so much pressure on the pedal for a sudden stop.

Rotors are 324 x 32mm and got about 2mm between the calipers and spokes.

I think the ABS is overworking, or set too strong.

The initial clamping is too gradual.

Even if you stamp on the pedal hard as hell, it feels no where near lock up.

How does the module work, and is it adjustable in any way.

How can you test or compare the module or is it just malfunctioning.

Has anyone disabled it or is this not recommended.

Look forward to some comments.

Edited May 5, 2006 by conan7772

[blind_elk]

If the ABS is working properly, when you stomp the brake pedal, you should get a pulsation back through the pedal as the ABS continually slackens off and re-applies the pressure to the fluid.

[joh21m]

isnt the whole purpose of ABS to stop you from locking up???

[dangerous_daveo]

isnt the whole purpose of ABS to stop you from locking up???

Yes, but some systems are too intrusive. They could let you stop faster and still have the ABS enabled, but they dont. Im not sure of the reasons why, someone else might be able to explain that.

[sh@un]

...Even if you stamp on the pedal hard as hell, it feels no where near lock up...

How hard are we talking here?

Take the car some where with no traffic, and smooth, level roads and brake a hard as you can from 70 or 80km/h to zero and get back to us about weather the pedal pulses when abs kicks in. You may just have really good tyres that just keep on gripping (no bad thing).

[Beer Baron]

i have found the 33 GTST system to be quite intrusive and cuts in too early like you describe. i've found my 32 GTR one to be later to cut in, allowing me to snatch a brake every now and then before cutting in. my 32 GTST has no abs and the pedal feel is much firmer and nicer.

i dont think there is much you can do about it. it's the characteristics of early 90s ABS systems with the ecu programmed for street use/safety. the GTR one may be programmed more agressively i'm not sure.

[conan7772]

Definitely too intrusive.

I will shortly perform a brake test and get back with the results.

I wonder if the module can be replaced with an R34 GTR one.

How can it be diagnosed through a computer?

Years ago I had a 1984 model Alfa GTV 2.0.

That thing could outbrake a 911 Carrera at the time.

Awesome.

Wouldn't mind the same feel considering the Brembo upgrade ! :laughing-smiley-014:

Edited May 9, 2006 by conan7772

[Greg]

In my experience, fitting a brake master cylinder brace actually made abs cut in even earlier again

[conan7772]

Test result :

From 80km/h to stop.

Heavy brake.

Car stopped at around 25-30 metres.

Felt a gradual smooth brake for around 2 secs, then pulsed.

The car still felt like it travelled too far.

From 70km/h to stop.

Absolute full stomp.

Car stopped in under 20 metres.

Felt ABS immediately and managed to get a tiny lockup on the fronts.

I'm talking less than 300 mm slide.

Just don't get that pressure against the seat belt like other cars.

The brakes almost feel like they're not power assisted.

On a sudden stop, I have to apply so much pressure on the pedal, I'm afraid it's gonna break or bend.

Normal braking is ok.

Don't have braided lines or a stopper,should have done it on the upgrade

Going to look into changing the ABS module as well.

To be continued...

Edited May 9, 2006 by conan7772

[chrissso]

Hey,

just for some input.

I threw some tyres on my old pulsar that I'd had lying around for a short term fix but because they were different diameters, that is bigger on the front, the front revolved slightly slower than the back. The abs picked this up as the front wheel locking up under breaks. It wouldn't let me brake like before. It was kicking in so early that it was dangerous. I pulled a fuse and turned off the ABS.

Its a really long shot, and probably not your issue, but I'm just trying to help.

Edited May 3, 2006 by chrissso