jyoteen

You don't need Castrol SRF. But usually Porsche guys will want the "best" so they spring for the liquid gold. I use Motul RBF600 and it works fine. I don't flush it after track event. I probably bleed my brakes about twice a year. It's cheap enough and gets the job done.

The thermal capacity of the brakes is pretty damn good on Porsches, mostly due to cooling and lighter weight, so the fluid doesn't really boil like it did on my Audi.

Don't laugh, but Ford Heavy Duty brake fluid is also really, really good, but about the same price as the Motul stuff.

mooty

i use motul 600rbf. i bleed every 500 track miles. never had any prob. never soft pedals. i frequently do 60 min non-stop sessions at DE's.

FixedWing

... with the possible exception of the PCCB brakes where most of the heat seems to be passing through the callipers. That was the reason I switched to SRF.

I have the same experience with my Audi S4 (stock brakes). They definately get hot. I am about to switch that to SRF.

Stephen

jyoteen

I tested all the braking systems for the Audi....Stoptech, Brembo, Alcon...

In the end, the Audi just didn't have cool air flowing into the hubs to evacuate the heat from the rotors. The bigger rotors cured some of the problem as it had a larger thermal capacity, but the root of the problem never was cured. It was fine for DE, and the Motul never boiled. A lot of that is also how you use the brakes as you well know.