Brake pad fade
 

After a couple good sessions today noticed significant loss of bite when braking after about 10 minutes on track. The first ten minutes plenty of bite and then they went numb. 991 GT3 pads never seemed to suffer to this degree. I also noticed on Suncoasts site they list a new Performance Pad set, are these from Porsche? Has anyone used them yet?

https://www.suncoastparts.com/product/pk992gt3pads.html

I am guessing the pads used during the reviews are different than what comes on the car in the US. Shame on you Porsche!!!!!

Hopefully it's just pad compound.

Was this by any chance on basically new pads? If you haven't driven in anger or bedded the brakes yet, you may have experienced "green fade" or degassing of the pads. When you are bedding brakes, what you just described (along with a stinky smell) are a sign you got them heated up enough to degas. Let them cool by driving a few miles without using brakes, let them cool 24 hours, and they should be good to go. Otherwise, perhaps you boiled your fluid?

As i wrote on another post had same issue, about 10-15 minutes in Pedal started to get long. Lack of replacement options at current moment sadly

I doubt it is the rotors. I’d swap some 991 track pads in there and do a fluid change and call it done for now.

changed fluid yesterday, pads on backorder, but have some old 991.2 Track pads with some life left, will try them out

are the carbon brakes or steel?

Sounds like fluid fade, not pad fade. Get some SRF in there and see how we do.

Some people reported warped (or warped feeling) rotors and loud sounds which implies issue with pads at minimum and maybe rotors too.

i was just commenting on the long pedal.

changed to Motul 660 a few days ago, running Barber next weekend so will let you know. Usually before I track my cars this is first thing I change, but ran out of time! This car out the showroom floor is pretty epic

I had done 4-5 sessions previously over two days before this, albeit at slower speed. Yesterday was my first day pushing hard. I don't think it was fluid as the pedal wasn't mushy, it was hard, just no bite. Degassing is possible. Will be curious to hear what Disden says after next weekend.

I'm still surprised to see the "Porsche Performance Pads" available and only as a set. It does make me think they changed compounds from the 991 pads which were very good.

Interesting that they might have gone with a less aggressive, track ready compound this time around. Seems implied with that sport pad option.

Running fluid + RSL1 + Girodisc and I think the improvement on the stock 991.2 system is barely perceptible over the course of a session.

That would be pad deposits. Sure sign of a less aggressive pad compound.