Good idea! Thanks.

Andy

 

Ken, Ken, Ken, Ken, Ken (pretend I wrote this out on a board somewhere 500 times! ;-)

Thanks for the additional information. I'm wondering what other 'brake fluid' warning indicators/conditions the Porsche can 'flag' to us. If the fluid 'boils', what will the car say to us ? If the fluid is 'low', it seems a bunch of us have gotten THAT message.

When I ran the track, it was at Max. When I ran through the hills, I had just bled out the stock fluid and put in Motul RBF 600 (not quite as high a temp as your Brembo fluid, but pretty good in my book 593 dry, 420 wet) and filled it half-way between min and max (and had the warning come up at least 2+ times). I have since filled it back to max.

Interesting theory/speculation about the level being a factor of where the float might be binding. Both the float being the culprit and the level seem to be plausible ideas to me.

With your set-up, I don't see you boiling your fluid anytime soon! ;-) That's just MASSIVE!!!!

I have always felt my stock 996TT brake set-up "felt" weaker than my brake set-up on my last fun-car, but haven't had time to go take the G-tech to go take "real" measurements to compare the two.

I was hoping the brakes might be sufficient for the track and focus on working the suspension instead. I have a couple of back-to-back track days coming up and want to see if the stock set-up will ever show me fade of any sort. The next step before I get tempted to break down and upgrade, would be to change out the stock pads and possibly get stainless steel brakelines (but I'm not feeling 'mushy' feel in the brakes, I just feel it doesn't engage 'quickly' enough, my foot has to 'travel' more than I think it should, and the braking seems to be linear to pedal travel at best).

Thanks,

 

That's so bizarre. What happens if you stuff a little thick rubber balloon/ball in there, or may be fins?

 

Interesting idea. but would that effect be any diffferent than further filling the fluid level above 'max' ? If we had an unmounted (userd or new) unit, we could fill it with water or anything and see how far you would have to fill it before short of being upside down, the sensor would never sense 'lack of fluid'.

So far, it sounds like :

1) Float stick
2) ECU programming error
3) <something else?>

seem to be the list of possible causes.

 

figured i'd revive this seeing as how no one really has a "fix" for this...even 12 years later.

it happened to me yesterday, so i was thankful to see all these "screw it, full throttle - it doesn't matter" replies. however, i'd like to NOT have to clear it or see it in the middle of a session.

any thoughts?

 

It used to happen to me all the time at the track. There is a very simple fit for this. It normally happens when the fluid level is a little too high. Just take a syringe and remove a some fluid making sure that the level is below the max line on the reservoir when hot. Once I did this I never had it happen again. I know, it's a little counterintuitive but it works.

 

+1 guys. I had this happen at Motorsport Ranch. Blue fluid with 997 GT3 6 pistons up front. I'm assuming that there is some volume expansion with the heat generated in the system that's just enough to raise the overall fluid level. I removed about a capfull and no more issues!

 

Correct. Once the fluid heats up from track use, the corresponding level rises in the reservoir. Once it gets above the full mark, the warning light comes on. The key is to start with fluid level about 1/4" below the full mark when cold.

 

I've been following this as it happens to me at the track, no real change in the pedal but disturbing to see any brake warning at speed. So last night I pulled some out must have pulled to much because when I drove the car to run a errand got the low brake fluid warning followed by pms failure light. I'll bring it back to that 1/4" below full mark.

 

nice - don't have another track day for a while, but i'm certainly TOPPED off; i'll take some out and hope for the best.

thanks!