New PCCB and Track days – Facts Feedback Thread
11-23-2016, 11:54 PM
#466
Three Wheelin'
Originally Posted by IPSA
After a lot of time, research and "conversations" with techs, PCNA, " brake guys" etc my sense is the pads are the problem. The pads seem to become hard and or glazed after a few good track days. They also show signs of degradation on front axle. They become very noisy and sound abrasive which I am sure is causing premature rotor wear. I wish I knew of CJ's PCCB break in procedure for PCCB's before my last pad change. Not willing to roll the dice on 30 k.
Girodiscs from Clark solved the problem.
Cheers
Girodiscs from Clark solved the problem.
Cheers
11-24-2016, 12:54 AM
#467
Rennlist Member
11-01-2017, 01:15 AM
#468
Three Wheelin'
Resurrecting this thread with a cross post from the GT4 forum...
Took my car in for the 2 year intermediate service and while in there asked them to do a wear read on my rotors. Readings below (FYI each rotor has 3 measurement points)
Rotor---Max---Current---Min---%Worn
LF-------49-----48.0------36----7.7
LF-------50-----48.9------37----8.5
LF-------62-----61.1------46----5.6
RF-------64-----63.1------47----5.3
RF-------60-----59.2------44----5.0
RF-------63-----61.4------46----9.4
LR-------55-----47.7------42----56.2
LR-------56-----49.0------43----53.8
LR-------53-----45.4------41----63.3
RR-------57-----49.4------43----54.3
RR-------54-----46.7------41----56.2
RR-------58-----50.6------44----52.9
The car has 13k miles, 3k of those on the 4L, and 6-8 track days running original stock pads, SRF fluid, and traction control on. Front readings are awesome (avg 7% worn), rear readings are... terrible (avg 56% worn!!!). Measurements were taken with rotors on the car and calipers in place.
Could this be the result of PTV going hog wild on my rear rotors? Maybe a worn diff? I've felt PTV kick in a few times on the track and in the twisties on tight turns where the car seems to suddenly pull into the apex harder after I've already finished turning in... or maybe that's just my imagination....
Has anyone else done a carbon reading on their PCCB rotors yet? Anyone ever get PCCBs replaced under warranty for premature wear?
Took my car in for the 2 year intermediate service and while in there asked them to do a wear read on my rotors. Readings below (FYI each rotor has 3 measurement points)
Rotor---Max---Current---Min---%Worn
LF-------49-----48.0------36----7.7
LF-------50-----48.9------37----8.5
LF-------62-----61.1------46----5.6
RF-------64-----63.1------47----5.3
RF-------60-----59.2------44----5.0
RF-------63-----61.4------46----9.4
LR-------55-----47.7------42----56.2
LR-------56-----49.0------43----53.8
LR-------53-----45.4------41----63.3
RR-------57-----49.4------43----54.3
RR-------54-----46.7------41----56.2
RR-------58-----50.6------44----52.9
The car has 13k miles, 3k of those on the 4L, and 6-8 track days running original stock pads, SRF fluid, and traction control on. Front readings are awesome (avg 7% worn), rear readings are... terrible (avg 56% worn!!!). Measurements were taken with rotors on the car and calipers in place.
Could this be the result of PTV going hog wild on my rear rotors? Maybe a worn diff? I've felt PTV kick in a few times on the track and in the twisties on tight turns where the car seems to suddenly pull into the apex harder after I've already finished turning in... or maybe that's just my imagination....
Has anyone else done a carbon reading on their PCCB rotors yet? Anyone ever get PCCBs replaced under warranty for premature wear?
11-01-2017, 01:22 AM
#469
RL Community Team
Rennlist Member
Rennlist Member
Resurrecting this thread with a cross post from the GT4 forum...
Took my car in for the 2 year intermediate service and while in there asked them to do a wear read on my rotors. Readings below (FYI each rotor has 3 measurement points)
Rotor---Max---Current---Min---%Worn
LF-------49-----48.0------36----7.7
LF-------50-----48.9------37----8.5
LF-------62-----61.1------46----5.6
RF-------64-----63.1------47----5.3
RF-------60-----59.2------44----5.0
RF-------63-----61.4------46----9.4
LR-------55-----47.7------42----56.2
LR-------56-----49.0------43----53.8
LR-------53-----45.4------41----63.3
RR-------57-----49.4------43----54.3
RR-------54-----46.7------41----56.2
RR-------58-----50.6------44----52.9
The car has 13k miles, 3k of those on the 4L, and 6-8 track days running original stock pads, SRF fluid, and traction control on. Front readings are awesome (avg 7% worn), rear readings are... terrible (avg 56% worn!!!). Measurements were taken with rotors on the car and calipers in place.
Could this be the result of PTV going hog wild on my rear rotors? Maybe a worn diff? I've felt PTV kick in a few times on the track and in the twisties on tight turns where the car seems to suddenly pull into the apex harder after I've already finished turning in... or maybe that's just my imagination....
Has anyone else done a carbon reading on their PCCB rotors yet? Anyone ever get PCCBs replaced under warranty for premature wear?
Took my car in for the 2 year intermediate service and while in there asked them to do a wear read on my rotors. Readings below (FYI each rotor has 3 measurement points)
Rotor---Max---Current---Min---%Worn
LF-------49-----48.0------36----7.7
LF-------50-----48.9------37----8.5
LF-------62-----61.1------46----5.6
RF-------64-----63.1------47----5.3
RF-------60-----59.2------44----5.0
RF-------63-----61.4------46----9.4
LR-------55-----47.7------42----56.2
LR-------56-----49.0------43----53.8
LR-------53-----45.4------41----63.3
RR-------57-----49.4------43----54.3
RR-------54-----46.7------41----56.2
RR-------58-----50.6------44----52.9
The car has 13k miles, 3k of those on the 4L, and 6-8 track days running original stock pads, SRF fluid, and traction control on. Front readings are awesome (avg 7% worn), rear readings are... terrible (avg 56% worn!!!). Measurements were taken with rotors on the car and calipers in place.
Could this be the result of PTV going hog wild on my rear rotors? Maybe a worn diff? I've felt PTV kick in a few times on the track and in the twisties on tight turns where the car seems to suddenly pull into the apex harder after I've already finished turning in... or maybe that's just my imagination....
Has anyone else done a carbon reading on their PCCB rotors yet? Anyone ever get PCCBs replaced under warranty for premature wear?
11-01-2017, 02:20 AM
#470
The difference seems very huge! Maybe we could get some more input from other guys as well if anyone has measured?
The max readings per rotor are same for all current gen PCCB’s or are they car specific? E.g. Would max readings on my car be same os yours or do they vary?
Thanks!
The max readings per rotor are same for all current gen PCCB’s or are they car specific? E.g. Would max readings on my car be same os yours or do they vary?
Thanks!
11-01-2017, 08:48 AM
#471
Rennlist Member
Do you track with any of TC or SC on? SC in particular puts your brakes thru the paces.
That said even with both off you’ll see more wear in the rear than the fronts. It’s just how our cars were designed—smaller rotors in the back get worked harder.
That said even with both off you’ll see more wear in the rear than the fronts. It’s just how our cars were designed—smaller rotors in the back get worked harder.
11-01-2017, 08:59 AM
#472
Drifting
How would one go about obtaining warranty on Rotors?
11-01-2017, 02:28 PM
#473
RL Community Team
Rennlist Member
Rennlist Member
11-01-2017, 09:43 PM
#475
Rennlist Member
Strange you had such wear of your rear rotors. Hard to explain by driving style or whether the nannies are on or off. I had 32 track days on my '14 GT3 (about 3,000 track miles) and my fronts were still about 15-20% and the rears 40% left when I sold the car in June. I track with all the nannies on. The rear pads usually wear slightly faster, getting about 8 track days on the OEM pads.
11-01-2017, 10:46 PM
#476
RL Community Team
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Rennlist Member
11-01-2017, 11:38 PM
#477
Race Car
Join Date: Jan 2013
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Looks like a good idea swapping oem rear pads for softer ones
11-02-2017, 03:19 AM
#479
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Out of about half a dozen of heavily tracked gt3s I know of very closely, none see rears wear more than fronts. Why would they, other than for TC or PTV? With ediff rear brakes do not have that much to do unless the driver is riding TC all the time.
11-02-2017, 08:33 PM
#480
My experience on PCCBs with a 2016 GT3RS with 8,100 total miles and almost 1,000 track miles averages LF - 75%, RF - 81%, LR - 40% and RR - 73%. Switched to OEM cast iron.