Hey guys - 996tt owner here with upgraded GEN 2 PCCB's that the previous owner installed. I am tracking this car primarily so will most likely stick with steels.
I did do some searching on this and can't seem to get the appropriate answer but if it is out there feel free to point me there.

I wanted to know what is the best way to tell how much "life" is in them.

I have heard options of weighing them but figured I would ask here first.
Thanks

 

If you keep pads over 50% of life you will be fine. I track mine and have no issues. When the pads get low they cant dissipate the heat fast enough. Also make sure the cooling holes are clear and clean. I also have started running the racing pads made specifically for the Pccb rotors. Work great. RS1C

 

Thanks I am leaning this way as well after further reading. Are the RS1C the green pagid's? Do you have a link?
Thanks

 

Pm renn store. He is a vendor I think. He has them and best price. Pads are black. Blue backing I think

 

For PCCB rotors I seem to recall the rotor faces have shallow dimples/depressions in them that when gone is a sign the rotor is in need of replacement.

For track use though I wonder if taking the rotors down all the way is wise?

For the pads, as others have offered, at least on the track they are best replaced when they are about half worn.

 

There is no visual method to identify if PCCBs are worn out, under normal conditions, except through a Porsche dealer. Porsche uses a tool that measures carbon content in the rotors which is the only true method to identify if PCCB rotors are worn out.

There are passive temperature sensors embedded in the PCCB rotor that will indicate if the rotors have been exposed to excessive temperature. These are checked as a visual inspection. I do not have any info on inspection criteria, my dealer has always done the inspection for me.

 

all good info - I will be picking up some proper pads and enjoying them until they are no good.

 

The Pagid RSC1 pads are painted black. The green color specifies a Porsche Motorsport pad.

 

Good thread OP, I will need to pick up some pads soon enough for mine.

 

Weigh them. They have a a weight in grams stamped on the rotor hat.

 

No basis for using weight as a measure of wear. There is specification
for how much weight loss constitutes wearout for PCCB.

The normal wear mechanism in PCCB brakes is loss of carbon in the carbon-ceramic matrix. This occurs very slowly at temperatures experiences on the street which is why Porsche quotes 100k+ miles lifetime for PCCB rotors. The temperatures experienced on track results in accelerated carbon loss. The heat indicators embedded in the rotors are used to identify rotors that have seen excessive heating.

The only method to know definitively what condition your PCCB rotors are in is to have the carbon content measured.

 

Very simple to see if PCCBs are worn. No need to weigh. One indicator is the appearance of the dime sized wear indicator circles. Advanced stages of wear will be evident by the appearance of the rough textured carbon substrate and the shiny surface flaking off. When they're worn, you'll know it. Trust me..

 

Thank you as always.

 

No problem. FYI, most 997TT guys will see accelerated wear on the rear rotors first as the rear brake rotors do not come with ducting (like on the GT3) and run much hotter than the fronts due to elevated temps from PSM interaction. Look at a hard driven track 997TT and note the heavy discoloration on the rear calipers. Hardly any guys put the RS ducting in the rear because frankly they are not aware of the option.

 

Pwdrhound always sharing the wisdom!! More info on the RS ducting option? Where can we get it and is it a DIY type of deal?