gt3 brake failure

[band1200]

I've got a year 2000 Gt3 that had a complete brake failure on track recently. The pedal was nice and solid but nothing was happening at the wheels. Its got larger rotors on it with extra cooling and it wasnt brake fade or not enough heat in them. They were fine at the same point on the previous lap. I've had the abs system checked using the Porsche computer and the memory doesnt show any faults and there is nothing trapped down near the pedal box. Its back on the road now and the brakes seem yo be working ok but i dont want to use it properly until i know what went wrong. Any ideas?

[Carrera74]

I've got a year 2000 Gt3 that had a complete brake failure on track recently. The pedal was nice and solid but nothing was happening at the wheels. Its got larger rotors on it with extra cooling and it wasnt brake fade or not enough heat in them. They were fine at the same point on the previous lap. I've had the abs system checked using the Porsche computer and the memory doesnt show any faults and there is nothing trapped down near the pedal box. Its back on the road now and the brakes seem yo be working ok but i dont want to use it properly until i know what went wrong. Any ideas?

Those are very typical symptoms for either:

1) Boiled (old) brake fluid

2) Brake pad "green fade" from not being properly bedded before use

[PAULSPEED]

Hi,

Sounds like not using racing brake fluid. I was recommened to use

the blue race fluid.

Paul

[Carrera74]

Hi,

Sounds like not using racing brake fluid. I was recommened to use

the blue race fluid.

Paul

One can use ATE Type 200 or Super Blue; the only difference is the color, Motul 600, or for "problem children", Castrol SRF.

The most important thing is to flush & bleed the system a few times a year for those who do track events. :)

[KevinC]

If the pedal was firm while the incident was occurring, it does not sound like a problem with the brake fluid. Boiled fluid would have given you a very soft pedal. It could be pad fade, as C74 suggested. Green fade would be recognizable by a strong brake smell. Which pads were you using? Maybe you exceeded the temperature range for the pads and they lost a lot of friction.

[band1200]

If the pedal was firm while the incident was occurring, it does not sound like a problem with the brake fluid. Boiled fluid would have given you a very soft pedal. It could be pad fade, as C74 suggested. Green fade would be recognizable by a strong brake smell. Which pads were you using? Maybe you exceeded the temperature range for the pads and they lost a lot of friction.

I know it wasnt a brake fade problem or boiling, as you say with a firm pedal that wouldnt be the case, i am running the Performance Friction pads for street/track use and have got them in another gt3 without any hitches, it looks like i will have to replace the abs pump and servo but its not conclusive that that was the fault.