PCCB on new Cayennes

[BMCG]

991fan said:

hondansx said:

Have never understood the fuss with Porsche doing fabulous brakes. The 'big reds' on any Porsche i've driven feel no better than your average car. However, the PCCBs feel instantly better and more confidence inspiring.

On that note, can you get PCCBs on the Macan as i'm thinking of getting a Turbo as my daily?

I agree PCCB's are much better, having tried both. You get much more feel and instant bite IMHO.

Yes available on Macan, 8 week delay for PCCB on the Cayenne Turbo but will be available again.

Thanks

there really should be a sticky on Porsche Coffee and Car Brakes.....

So much of the (perceived) difference in PCCB vs Steel performance is down to the initial bite point....

with the stock ceramics & pads running a rather more aggressive set up in this respect.

you can replicate with steels by switching to a pad with a stronger initial bite....say PFC08s.

also found the ensuing of interest in the PCCB vs Steel debate, herewith courtesy of fioran0 on Pistonheads:

"Heres a graph from an independent brake test done on various cars. Of interest here of course is the 911 with and without PCCB. 350mm PCCB with 6 pots, 330mm Steels with 4 pots IIRC.

Each cycle contains 5 brake stops from 100mph - 0mph with 20 second gaps between the stops.
The first stop in each cycle was done using approx half brake force (0.5G) to measure pedal and the next 4 stops were done with maximum braking force (hence the panic stop label) from 100mph to 0 mph to complete that cycle.
This complete cycle was then repeated until fade presented itself (or i presume boredom kicked in in the case of the Porsches and Corvette).

You will note that the Steel and PCCB cars perform the same and without fade even after almost 50 repeat stops. You can see the BMW progressively loses its brakes from 4th cycle onwards and the Nismo Z hits full fade midway through cycle 3. I believe the Porsches were on Pirelli P Zero, the Vette on Goodyear Eagle."

[Harris_I]

BMCG said:

there really should be a sticky on Porsche Coffee and Car Brakes.....

No point. People just believe what they want to believe. When racers present irrefutable empirical data, some will cover their ears and shout lalala.

[franki68]

Harris_I said:

No point. People just believe what they want to believe. When racers present irrefutable empirical data, some will cover their ears and shout lalala.

quoting a 911 when talking about a cayenne is not irrefutable empirical data .
Here's a quote from car and driver on the cayenne's steel pads on a brake test
'The Cayenne's weight dampens our enthusiasm in other ways. The braking distance from 70 mph, 170 feet, is six feet longer than a BMW X5 4.6is's—this despite the fact the Cayenne has six-piston front calipers and gigantic vented discs. And according to fearless leader Tony Swan, this same sport-ute's brakes got a little squishy during his intrepid One Lap flog-fest (see story on page 142). How very un-Porschelike.'

[Harris_I]

Most journos have worthless opinions on this subject. 90% of them would do well to learn how to brake first.

[hondansx]

I understand a switch of pads will change things; as well as multiple other components. However, what does that do for warranty? What side effects does it produce?

However, i appreciate your point and the test results - but there's no need for people to get themselves in a state where you must be right and you are wrong.

To pick holes, that appears to be a test of a Gen 1 997; technology has moved on since then and - as has been pointed out - this is a thread about the Cayenne, not a 911.

Moreover, the fact that the PCCB discs are larger would mean more clamping force. So as long as there is enough tyre, that would result in a like-for-like braking improvement.

And one small thing - they look cooler, let's face it... (and no brake dust)

[BMCG]

Stateside pad switches had NO impact on warranty...assuming they were road legal pads...that is...

It is rather akin to swapping between tire types/manufacturers (e.g: Michelin Super Sports to Pirelli Zero Corsas)....

You alter the feel/characteristics of the car...to suit you.

Regardless...bigger issue for the Coffee breaks on a Cayenne...is surely around off roading....if you remotely contemplate such...I'd aver.

Fast flying stones and ceramics...is not a great combination.

[catfood12]

So, I bought a new Cayenne Diesel 'S' last year, and after some deliberation, stuck the PCCBs on it. I had a V6 diesel with steels for a weekend before agreeing the spec of my V8. The steel brakes, whilst very good, would fade noticeably on a brisk country hack, i.e. A350 Shaftsbury to Poole, a regular route that can be covered rapidly when leaving the office late as I often do. Fading brakes do not inspire confidence at all. Just as a previous poster said, up and down the Alps are a similar scenario. I think we all know the only off roading these will do is a wheel on the pavement outside Fortnums. No more facetiousness needed here.



The brakes on the Cayenne, like any high CoG vehicle, are more heavily biased heavily to the front, more so than a regular car, so will heat up faster in proportion to say a 991, and more weight to slow down too, so have a harder life than fronts would on say an M3.

I do around 24K miles a year in the Cayenne, just up to 33K now, and will keep it to 150K or so. I'm anticipating the ceramics are a zero cost, or maybe even a saving over this period. I had a set of front pads at 25K, rears are still now at 70%. PCCB discs should last me the 150K (failure, not wear, withstanding). The Internetz posters say front steel discs and pads at every 40K on a Cayenne, at £1100/time, not sure if intermediate pads too. Over 150k miles, I'm quids in.

The additional bonus is there's negligible brake dust. The wheels just need a wash like the rest of the car. No need for wheel cleaner and on your hands & knees !

It was a rationed decision, and a £5.5K option after all.

OP, instead of the turbo, how about a Diesel S with a remap....1000nm etc...