DATA: Actual PCCB wear data shared…90% tracked GT3 991.2
11-17-2022, 06:27 PM
#31
By my estimation for the discount prices you can find for replacement PCCB rotors cost wise the PCCB's can nearly match the cost of cast-iron because you can get multiple pad-swaps for one set of rotors. If you can get 5 or more sets of brake pads per-set of PCCB's rotors the total cost vs. steels is not all that terrible and you get to use PCCB rotors which have excellent thermal characteristics and less brake dust.
Great post and thanks for sharing the data.. What is the per rotor price of the PCCB rotor and the Steel rotor that you are basing this off of?
11-17-2022, 06:39 PM
#32
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Seems I read here or somewhere on RL of a study conducted measuring density on and off the car which demonstrated the impact of the reading.
Can't remember if the bias was for higher or lower wear calculation. Anyone know for sure what the impact is?
I paid my dealer to perform the test. I was not there, so I can only conclude that they did not skimp and removed the rotor.
Here are my stock numbers averages (fairly consistent from factory):
LF 15
RF 15.7
LR 13.7
RR 13.3
Can't remember if the bias was for higher or lower wear calculation. Anyone know for sure what the impact is?
I paid my dealer to perform the test. I was not there, so I can only conclude that they did not skimp and removed the rotor.
Here are my stock numbers averages (fairly consistent from factory):
LF 15
RF 15.7
LR 13.7
RR 13.3
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mipcar (11-17-2022)
11-17-2022, 06:39 PM
#33
Thanks for the data and the excellent write-up. Totally agree changing pads before full wear is key. The pads act as heat sink, the thicker the pads the more heat it'll take up and dissipate. The PCCB rotors wear exponentially faster as temps rise. Changing at 40% will definitely reduce rotor wear.
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11-17-2022, 10:01 PM
#34
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Seems I read here or somewhere on RL of a study conducted measuring density on and off the car which demonstrated the impact of the reading.
Can't remember if the bias was for higher or lower wear calculation. Anyone know for sure what the impact is?
I paid my dealer to perform the test. I was not there, so I can only conclude that they did not skimp and removed the rotor.
Here are my stock numbers averages (fairly consistent from factory):
LF 15
RF 15.7
LR 13.7
RR 13.3
Can't remember if the bias was for higher or lower wear calculation. Anyone know for sure what the impact is?
I paid my dealer to perform the test. I was not there, so I can only conclude that they did not skimp and removed the rotor.
Here are my stock numbers averages (fairly consistent from factory):
LF 15
RF 15.7
LR 13.7
RR 13.3
On car measurement tends to read higher wear because of the metal on the inboard side of the rotor.
Take off the car and do not measure on metal surface.
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Andi (11-18-2022)
11-24-2022, 05:48 PM
#35
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11-24-2022, 08:24 PM
#36
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Last edited by johnsopa; 11-24-2022 at 08:25 PM.
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11-24-2022, 08:31 PM
#37
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daveo4porsche (11-24-2022)
11-25-2022, 08:37 PM
#39
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Thread Starter
the CarboTech tool is about $6k - I have a source for them in the bay area…
11-26-2022, 09:10 AM
#40
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I track with PCCBs, don’t feel the need to switch to steels based on what I’ve found based on the readings.
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11-26-2022, 07:40 PM
#41
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11-26-2022, 08:04 PM
#42
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Based on the data provided here, I have at least 1 year worth before PCCB rotor wear at the track becomes a concern. I ordered Girodisc rotors and pads and plan to install them for next year's season. That should leave a good years worth of track use on my used PCCB rotors. Should sound good for if and when I resell my car.
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daveo4porsche (04-06-2023)
02-22-2023, 10:12 AM
#43
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04-06-2023, 11:25 AM
#44
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Fantastic feedback and data Dave.
I too came to the conclusion that it made sense to keep using CCBs on my Street Cars with occasional track use. My conclusion was based on the data when I raced CCBs in a Ferrari Challenge for 3 seasons. On average I could do 3-4 race weekends that included 2 x 45mins sprint races plus 4 x 30mins sessions (on those I did no more than 7-10mins / 3-4 laps all-out at a time. With that info and understanding that heat is the main culprit of wear I came to thee conclusion that most likely I would never wear the Street cars CCBs in the 3-4 years of average ownership
With more than 1 car + racing on race cars, I rarely do more than 5-7 track days, and in the street cars being SO HEAVY, the weakest link for la-time is the tires so I rarely do more than 2-3 hard laps at a time before having to do a cool down lap for the tires to regain grip or come into the pits and check my lap data. Only on a heavy (and almost 200mph fast!) Ferrari FF at Daytona I felt that the rotors were being put to their max on just 1-2 laps.
Love the consistent , no fade under any circumstances feel of CCB brakes on Trackable streetcars. Very disappointed that the factory option on non RS cars is not available due to supply as the ordering price on the option is relatively" cheap. But I do agree with you that Porsche has to be making 60%+ margin on the replacements
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I too came to the conclusion that it made sense to keep using CCBs on my Street Cars with occasional track use. My conclusion was based on the data when I raced CCBs in a Ferrari Challenge for 3 seasons. On average I could do 3-4 race weekends that included 2 x 45mins sprint races plus 4 x 30mins sessions (on those I did no more than 7-10mins / 3-4 laps all-out at a time. With that info and understanding that heat is the main culprit of wear I came to thee conclusion that most likely I would never wear the Street cars CCBs in the 3-4 years of average ownership
With more than 1 car + racing on race cars, I rarely do more than 5-7 track days, and in the street cars being SO HEAVY, the weakest link for la-time is the tires so I rarely do more than 2-3 hard laps at a time before having to do a cool down lap for the tires to regain grip or come into the pits and check my lap data. Only on a heavy (and almost 200mph fast!) Ferrari FF at Daytona I felt that the rotors were being put to their max on just 1-2 laps.
Love the consistent , no fade under any circumstances feel of CCB brakes on Trackable streetcars. Very disappointed that the factory option on non RS cars is not available due to supply as the ordering price on the option is relatively" cheap. But I do agree with you that Porsche has to be making 60%+ margin on the replacements
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