Good intel
Thanks for sharing

 

Stay tuned - I have more data from two separate readings at 4,700 and 8,700 miles, just need time to assemble it with enough data on mileage to make sense -- traveling at the moment for work so I can pay for my hobby. I think the results may be better than a straight linear relationship.

I would caution once again that I am not racing the car; I am driving it hard but not like some on this forum are driving their cars. And Lime Rock is not super hard on brakes.

 

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Ok. I misunderstood the chart and thought it was just a thickness measurement. Well then they are really holding up well. Sounds like with the right pads the 3rd generation pccb could be safe on your pocket to track.

 

Do you think it's reasonable to assume a linear rate of wear? Don't you think wear might accelerate as the density decreases?

 

Here is more data -- I have had the PCCB rotors and pads checked twice by the same Porsche dealer but two different service techs. The first came after 5 tracks days (486 miles -- 4 at Sebring a 1 at Lime Rock) and 4,792 total miles. The second came at 6 more track days (705 miles all at Lime Rock) and 8,670 total miles.

I wish I had measured the rotors when the car was new. I suspect that the change between the "new figure" numbers, which are etched onto the rotor hat, and the first readings at 4,792 miles may represent initial break in wear as much as the 486 mile track wear. There is not much apparent wear between the first and second readings when the car spend 705 miles on the track; is it possible that initial wear is higher and once the rotors are "broken in" the wear slows down?




Obviously there is also some variability in the readings because some of the second readings are higher than the first readings +/- 5%??? Only the first reading on the Left Rear is way off?

 

By that it looks like there is no measurable wear in 700 track miles? pretty interesting

 

That's what the data seems to indicate given the variability of the testing equipment itself.

One point to remember, those 700 miles were at Lime Rock which is a short track with seven turns but not heavy braking, if any, on six of them the way I am driving (1:02 to 1:04 sec laps). Only at the end of the "long" Posey straight from 135 MPH to about 65 - 70 MPH at the first apex of Big Bend is the braking hard.

I plan to keep checking brake wear every 800 to 1,000 miles of track use and will report it; I do plan to change pads a 6 mm. Not sure which pad I will use, but for my purposes the stock pads have been performing well. I also recently changed brake fluid using the OEM fluid.

Right now I am impressed with the Gen 3 PCCBs, much better than the Gen 2s I had on a previous car (no data to support that claim).

 

Nice! I'm a rookie, was seeing best lap at 1:06, averaging around 1:08 to 1:10. Best I saw on Posey was 130. I've got a lot to learn, I'm definitely braking too much before turn in, common rookie problem.

Jeff

 

For what it's worth,

I was recently at Barber Motorsport Park for a 918 delivery with my father. The advanced Porsche classes were taking place on track at the same time.

I spoke with a number of the instructors individually about swapping the PCCB rotors on my GT3 to a steel/iron alternative. Each of them came back with the exact same response: no need w/ the new PCCBs.

I completely understand that these guys are paid by Porsche to represent the product and technology in as high a light as possible so their comments should be taken with a grain of salt.

That said... they had a fleet of track dedicated GT3's each equipped with PCCB's. They've had them the entire year and not swapped rotors yet....

That gave me a lot of confidence to stick it out w/ my ceramic rotors....

 

 

That is very encouraging - I was trying to figure out if I could swap the PCCBs on the GT3 with the cast iron setup on a Panamera GTS - cars are the same year. Maybe I should just stop worrying about destroying my PCCBs.

 

Eh if they're student training cars then they're probably pretty easy on the brakes overall.

 

My observations, particularly when & if used in the "Masters" group, would be otherwise. Some folks, regardless (or maybe even because of) their experience, or lack thereof, FWIW & in my opinion only, are just god awfully hard on brakes.

 

I think one thing is for sure and this is based upon limited dada on the latest PCCBs above, the Gen 3 brakes are very significantly better than the Gen 1 and Gen 2 systems. I have had all of them and these are without question the best -- of course they are also significant larger in diameter and I believe that the pads are a different composition as well. More time will tell.