[Mark Hubley]

I am planning to take my 981 on track for the first time at the July 5 Summit Point event. I did all the brake fluid flushing on my previous track cars (996, 924S, 944) and plan to flush the brake fluid myself on the 981 soon.

Is it sufficient for inspection/participation purposes to do the flush that I am able to do with a Motive Power Bleeder? Add brake fluid (I have Ate), hook up the bleeder, pump up some pressure, and go through the calipers. That is what I did with my previous cars, and I never had a problem with brakes.

Or is it necessary to do something with a computer activating the ABS system, or whatever? I don't know much about that, but I have seen things online saying that a proper flush requires something along those lines.

[trytryagain]

I flushed the brakes in my 981 Cayman the way you described for 8 years without any problems. I did use a higher temp brake fluid, which avoided any need to bleed the brakes during the day.

[Dr K]

I agree with Jim. Flush with Motive but use higher-temp fluid (I use SRF).

Peter

[Nerfbar]

Originally Posted by Dr K

I agree with Jim. Flush with Motive but use higher-temp fluid (I use SRF).

Peter

SRF seems to be best at holding its wet boiling point, but its expensive. Best price i've found is on Amazon.

[HoodPin]

FWIW, I've been using the 600 degree brake fluids (Wilwood, Motul, etc.) By bleeding the calipers before each DE weekend, for us the fluid has held up just fine over a DE weekend. Even with our AER car(s), after 8 hours of racing, we bleed the brakes each evening as a precaution, but I don't recall ever having had fluid failure happen. And I figure that after about 5 or 6 caliper bleedings, the entire system is flushed. Remember, the only fluid being stressed by the brakes is what's in the caliper. And AFAIK, the caliper fluid doesn't migrate back up into the brake lines. So once the caliper fluid is evacuated, the fluid coming in should be pretty fresh. In fact, I sometimes lament that the bled fluid I end up dumping (properly) is probably better than what's in 80% of the cars on the street. Also, I wouldn't worry about cycling the ABS system, unless there's an apparent problem with ABS braking.

[Mark Hubley]

I appreciate all the input. Thanks!

I did the flush this morning. Ran nearly two liters of Ate 200 through the system. Probably overkill, but this is the first time I flushed this car, and I had two liters on hand.

Maybe I will try a different brand of fluid in the future, but Ate always seemed to work for me in the past. I liked when you could alternate the blue and the gold.

[BlackTalon]

Originally Posted by Mark Hubley

I liked when you could alternate the blue and the gold.

You still can. It's just that it's not 'street legal', just like aftermarket exhaust systems.

The main issue with it though is the blue stains everything.

[Trak Ratt]

Originally Posted by BlackTalon

You still can. It's just that it's not 'street legal', just like aftermarket exhaust systems.

The main issue with it though is the blue stains everything.

X2