997 pccb fail on rs
Discussion
Cavanagh said:
What are the options on cars with pccb as my pal has had his fail on his 997 and he needs a new set of disks because porsche are going down the wear and tear route
do alcons fit straight onto the car with no need for new calipers
Personally I would try another dealer - ie the ones who appreciate what the car is designed for, it has been remarked elsewhere re pccb issues on a rs - and that dealer acknowledged mechanical failure. do alcons fit straight onto the car with no need for new calipers
What was the nature of the failure?
I would avoid at all costs non standard brakes on a car which is otherwise within warranty.........again I think you just have a bad dealer
Geneve said:
I've not heard anything adverse regarding the latest generation (3) PCCBs on the new GT3.
It would still be possible to damage them, but in normal (road and track) use, several sets of pads should wear out before the discs.
I recall someone mentioned the bell bolts loosening and tearing a drive shaft gaiter - the dealer acknowledged mechanical failure and I THINK replaced both front disks - as they should......It would still be possible to damage them, but in normal (road and track) use, several sets of pads should wear out before the discs.
Cavanagh said:
What are the options on cars with pccb as my pal has had his fail on his 997 and he needs a new set of disks because porsche are going down the wear and tear route
do alcons fit straight onto the car with no need for new calipers
997 GT3 RS front PCCBs are 380mm diameter. I stand to be corrected but the Alcons are a 362mm disc. The steel factory option is a 350mm disc, I'm unsure as to whether the caliper is the same item (but different colour) spaced out to allow fitment onto the larger PCCB disc, or whether a different caliper is used altogether for the smaller steel discs.do alcons fit straight onto the car with no need for new calipers
Dr S said:
This means to stay clear of PCCB's even today?
No this means you are jumping to conclusions because the information provided in the first instance is extremely vague and gives no explanation of why the failiure occured. Driving the car into a bridge parapet at 100mph could cause the brakes to fall apart!
SidewaysSid said:
Dr S said:
This means to stay clear of PCCB's even today?
No this means you are jumping to conclusions because the information provided in the first instance is extremely vague and gives no explanation of why the failiure occured. Driving the car into a bridge parapet at 100mph could cause the brakes to fall apart!
advanced wear (i.e large dark areas where the outer surface had delaminated), I'd say they can still suffer the same fate as earlier generations of disc if subjected to prolonged track use.
Having seen two 997's at the 'ring a week or so ago (997 S & 997TT) with PCCB's that were suffering from
advanced wear (i.e large dark areas where the outer surface had delaminated), I'd say they can still suffer the same fate as earlier generations of disc if subjected to prolonged track use.
OR
alternatively don't let Mr. No-mechanical-sympathy-whatsoever drive your car. I could rise to the challenge and destroy any part of a car given time and an open cheque book.
I have only knackered one set of brake discs in all the years I have done track days. The car was a 964, year 1998, I didn't know about cooling down laps, came into the pit lane, stopped, kept my foot on the brake pedal and hey-presto warped discs. Ingnorance may be bliss but it's also damned expensive.
SidewaysSid said:
Having seen two 997's at the 'ring a week or so ago (997 S & 997TT) with PCCB's that were suffering from
advanced wear (i.e large dark areas where the outer surface had delaminated), I'd say they can still suffer the same fate as earlier generations of disc if subjected to prolonged track use.
OR
alternatively don't let Mr. No-mechanical-sympathy-whatsoever drive your car. I could rise to the challenge and destroy any part of a car given time and an open cheque book.
I have only knackered one set of brake discs in all the years I have done track days. The car was a 964, year 1998, I didn't know about cooling down laps, came into the pit lane, stopped, kept my foot on the brake pedal and hey-presto warped discs. Ingnorance may be bliss but it's also damned expensive.
So other than with a 964 you've never replaced a set of discs on any car you've done track days with. They've lasted the duration of time you've owned the car and have never worn out?advanced wear (i.e large dark areas where the outer surface had delaminated), I'd say they can still suffer the same fate as earlier generations of disc if subjected to prolonged track use.
OR
alternatively don't let Mr. No-mechanical-sympathy-whatsoever drive your car. I could rise to the challenge and destroy any part of a car given time and an open cheque book.
I have only knackered one set of brake discs in all the years I have done track days. The car was a 964, year 1998, I didn't know about cooling down laps, came into the pit lane, stopped, kept my foot on the brake pedal and hey-presto warped discs. Ingnorance may be bliss but it's also damned expensive.
Edited by 993rsr on Thursday 12th July 16:08
993rsr said:
SidewaysSid said:
Having seen two 997's at the 'ring a week or so ago (997 S & 997TT) with PCCB's that were suffering from
advanced wear (i.e large dark areas where the outer surface had delaminated), I'd say they can still suffer the same fate as earlier generations of disc if subjected to prolonged track use.
OR
alternatively don't let Mr. No-mechanical-sympathy-whatsoever drive your car. I could rise to the challenge and destroy any part of a car given time and an open cheque book.
I have only knackered one set of brake discs in all the years I have done track days. The car was a 964, year 1998, I didn't know about cooling down laps, came into the pit lane, stopped, kept my foot on the brake pedal and hey-presto warped discs. Ingnorance may be bliss but it's also damned expensive.
So other than with a 964 you've never replaced a set of discs on any car you've done track days with. They've lasted the duration of time you've owned the car and have never worn out?advanced wear (i.e large dark areas where the outer surface had delaminated), I'd say they can still suffer the same fate as earlier generations of disc if subjected to prolonged track use.
OR
alternatively don't let Mr. No-mechanical-sympathy-whatsoever drive your car. I could rise to the challenge and destroy any part of a car given time and an open cheque book.
I have only knackered one set of brake discs in all the years I have done track days. The car was a 964, year 1998, I didn't know about cooling down laps, came into the pit lane, stopped, kept my foot on the brake pedal and hey-presto warped discs. Ingnorance may be bliss but it's also damned expensive.
Edited by 993rsr on Thursday 12th July 16:08
From some research on the ceramics so far,it seems like all the ceramics are suspect for track use and fine for every day road use.But if you dont mind replacing them every year or so,then i guess thats ok.
The main problem for track use is heat,and the fact the ceramics with there microns thick
ceramic coating does not stand up well to the heat,and does not disapate the heat well.
They do produce a lot of dust with the soft pad,when used hard on track, the harder pad knackers the ceramic coating.
One reason they work loose,is not that they were not tightened up correctly,but the fact that the discs shrink with more heat,so check your discs!!
I measured the thickness of all 4 discs on the gt and every one was a differant size,and strange that the rears had shrunk by nearly 1mm.
One of the main differances on the first to last generation has been the production process time has been halfed,but no reduction in cost to the consumer.
I have just converted my cgt discs from ceramic to steel,simply because i intend to use it fairly heavily,and can not justify the crazy price of 3400+vat each for the 380mm,which could well be every year,as to £300 per disc,which is bad enough.
The unsprung weight has not made any real differance that matters,accept possibly for the better on the steering,as it has given a bit more feel.The dampers are thumping a little louder on the cats eyes etc.And its now nice to feels some modulation in the brake pedal,and lost the wooden feeling of the ceramics.
Why do the cup cars still not come with ceramics,although the supercups have,and of course run a huge budget,and can afford to replace the discs often.
The main problem for track use is heat,and the fact the ceramics with there microns thick
ceramic coating does not stand up well to the heat,and does not disapate the heat well.
They do produce a lot of dust with the soft pad,when used hard on track, the harder pad knackers the ceramic coating.
One reason they work loose,is not that they were not tightened up correctly,but the fact that the discs shrink with more heat,so check your discs!!
I measured the thickness of all 4 discs on the gt and every one was a differant size,and strange that the rears had shrunk by nearly 1mm.
One of the main differances on the first to last generation has been the production process time has been halfed,but no reduction in cost to the consumer.
I have just converted my cgt discs from ceramic to steel,simply because i intend to use it fairly heavily,and can not justify the crazy price of 3400+vat each for the 380mm,which could well be every year,as to £300 per disc,which is bad enough.
The unsprung weight has not made any real differance that matters,accept possibly for the better on the steering,as it has given a bit more feel.The dampers are thumping a little louder on the cats eyes etc.And its now nice to feels some modulation in the brake pedal,and lost the wooden feeling of the ceramics.
Why do the cup cars still not come with ceramics,although the supercups have,and of course run a huge budget,and can afford to replace the discs often.
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