PSCBs on a Cayenne
Discussion
I’m looking at a 22 plate Cayenne equipped with PSCBs. The description sounds good (greatly reduced brake dust, virtually no fade and longer life than conventional cast iron) but I have not been able to find out just how long they are expected to last save for a Car and Driver article saying 30%. Their replacement cost is quite high according to https://teile.com/en/porsche-parts-shop/model-Caye... That’s quite a price to pay for less brake dust and only a 30% increase to disc life.
Does anyone have any real world experience with PSCBs on a Cayenne? I appreciate they’re heavy cars and brakes and tyres will be consumed at a rate of knots but brakes that dear that don’t last proportionally longer seem a bit pointless. So insights welcome.
Does anyone have any real world experience with PSCBs on a Cayenne? I appreciate they’re heavy cars and brakes and tyres will be consumed at a rate of knots but brakes that dear that don’t last proportionally longer seem a bit pointless. So insights welcome.
Koln-RS said:
I have seen quite a few top spec Cayennes and Coupes with pccbs.
There are a lot of benefits, but I would have thought the important relative unsprung weight saving would be more noticeable on a lighter ‘sports’ car. Still a nice option to have though.
On most road cars, disc life is said to be 100,000 mls plus, but the pads need changing with similar frequency to standard iron brakes.
PSCB are a tungsten carbide coated metal rather than a carbon ceramic rotor (PCCB).There are a lot of benefits, but I would have thought the important relative unsprung weight saving would be more noticeable on a lighter ‘sports’ car. Still a nice option to have though.
On most road cars, disc life is said to be 100,000 mls plus, but the pads need changing with similar frequency to standard iron brakes.
No personal experience but I have often wondered the same.
3-4x the cost of replacing cast iron discs, and a 30% longer life.
Only a 0.1mm thick coating before the discs need to be replaced, I'd worry that they could get chipped or damaged (although I have no evidence to support that).
3-4x the cost of replacing cast iron discs, and a 30% longer life.
Only a 0.1mm thick coating before the discs need to be replaced, I'd worry that they could get chipped or damaged (although I have no evidence to support that).
3xAAA said:
No personal experience but I have often wondered the same.
3-4x the cost of replacing cast iron discs, and a 30% longer life.
Only a 0.1mm thick coating before the discs need to be replaced, I'd worry that they could get chipped or damaged (although I have no evidence to support that).
There are examples of these becoming chipped and then Porsche expect the customer to expensively replace them to maintain the much heralded extended warranty. I think they’re best avoided in favour of standard. I’m not sure what the point of carbon ceramics are on an SUV, but probably a better bet than carbide surface coated. 3-4x the cost of replacing cast iron discs, and a 30% longer life.
Only a 0.1mm thick coating before the discs need to be replaced, I'd worry that they could get chipped or damaged (although I have no evidence to support that).
My 2019 Turbo came with PCCB's.
The car has low miles - only 16k - so I can't really comment on how long they will last, but I can say what they are like to live with...
Overall great - stopping as you expect is excellent for such a heavy car.
No brake dust.
When I have driven a non PCCB Cayenne (when mine has been serviced etc) the difference in braking is really noticeable, in that the cars feel much heavier under braking and not as confidence inspiring compared to the PCCBs.
They don't squeal or make any noise - just stop very well.
Only issue I have with them is when driving in heavy rain on a motorway, that first press of the brake pedal doesn't bite like a steel brake, which can be a bit alarming at first, so I tend to make sure sure that if i do need to brake, a quick dab is applied first, to (almost clear the water or bring to things up to temp) and then braking is normal there after...
Also if you have been to a car wash and they have jet washed the wheels, that first dab of brakes when leaving behaves the same...
Other than that - they are excellent. I hope I never have to replace them mind!
Cheers
Steve
The car has low miles - only 16k - so I can't really comment on how long they will last, but I can say what they are like to live with...
Overall great - stopping as you expect is excellent for such a heavy car.
No brake dust.
When I have driven a non PCCB Cayenne (when mine has been serviced etc) the difference in braking is really noticeable, in that the cars feel much heavier under braking and not as confidence inspiring compared to the PCCBs.
They don't squeal or make any noise - just stop very well.
Only issue I have with them is when driving in heavy rain on a motorway, that first press of the brake pedal doesn't bite like a steel brake, which can be a bit alarming at first, so I tend to make sure sure that if i do need to brake, a quick dab is applied first, to (almost clear the water or bring to things up to temp) and then braking is normal there after...
Also if you have been to a car wash and they have jet washed the wheels, that first dab of brakes when leaving behaves the same...
Other than that - they are excellent. I hope I never have to replace them mind!
Cheers
Steve
I have PSCBs on my Taycan Turbo (standard kit), although I'm not sure that they are directly compatible with a Cayenne due to regen and different method of propulsion (slightly odd brakes in the Taycan compared to all other Porsche's that I've driven, presumably due to regen and then mechanical brakes coming in. All I can add is that I do like the absence of brake dust after 21 k travelled with PSCBs. I haven't noticed any cold/wet weather decrease in braking either - I had PCCBs on the previous 2 Boxster's and although I personally see PSCBs as a positive, it taught me to be wary of cold and/or wet ceramics as they don't seem to have the same initial bite as steels in those circumstances!
Thank you for all the posts so far. I have also seen some posts on Rennlist with some higher mileages Cayennes and people have had no issue with the PSCBs.
I have PCCBs on my Boxster GTS and am very pleased the original owner specced the car that way. As it’s a fair weather summer car I’ve never really used them in anger in the cold and wet. I would chose them on a Cayenne if I could.
I drove the Cayenne with PSCBs yesterday and when cold and wet they did catch me off guard approaching the first roundabout at speed. Not a brown trouser moment but definitely raised eyebrows as more and more pedal effort was required before they began to bite as expected . After that they felt pretty normal.
I have PCCBs on my Boxster GTS and am very pleased the original owner specced the car that way. As it’s a fair weather summer car I’ve never really used them in anger in the cold and wet. I would chose them on a Cayenne if I could.
I drove the Cayenne with PSCBs yesterday and when cold and wet they did catch me off guard approaching the first roundabout at speed. Not a brown trouser moment but definitely raised eyebrows as more and more pedal effort was required before they began to bite as expected . After that they felt pretty normal.
PCCBs on my 2012 Turbo. Despite a certain J Plato being the first owner and it now having 167k miles, the discs still have around 40% of life left. Needed new pads around a year ago and those were expensive - £900 from Design911 but the braking performance is really good for a car of this size.
I’m a bit of a brake w
e but for me, good brakes are are thoroughly worthwhile expense. Really enhances the driving experience of these.
I’m a bit of a brake w
e but for me, good brakes are are thoroughly worthwhile expense. Really enhances the driving experience of these. Gassing Station | Front Engined Porsches | Top of Page | What's New | My Stuff