Ceramic vs. Std Brakes. The test...

[reimon]

Interesting results on a spanish mag published some weeks ago.
The test was between a RS4 Avant with ceramic brakes vs. a RS4 Cabrio with standard brakes.
So they did 10 hard brake test from 160 km/ to 0 km/h one after the other. Here you have the results in meters from the first test to the tenth:

RS 4 Avant with ceramics:

1º 100,8 mts
2º 96,4 mts
3º 97,8 mts
4º 95,3 mts
5º 93,4 mts
6º 92,2 mts
7º 92,2 mts
8º 92,2 mts
9º 92,3 mts
10º 91,9 mts



RS4 Cabrio Standard Brakes


1º 95,82 mts
2º 96,4 mts
3º 97,62 mts
4º 94,22 mts
5º 97,06 mts
6º 94,47 mts
7º 102,43 mts
8º 101,71 mts
9º 104,83 mts
10º 107,96 mts

Notice any difference???

Apart from that test here you have the difference measures between them:

- Ceramics: 380 mm front discs, 38mm wide, weight 5,5 kg each disc
- Standard: 365 mm front discs, 34 mm wude, weigth 11kg each

[KK265]

Notice any difference???

Very interesting!!Thank you.Until 6 test standard brakes are better or equal.After this ceramics.....

[Klinn]

I hope that the new RS6 will have ceramics (and v10 biturbo 600hp too :D)

[OzRS4]

I wonder why they used the Avant with Ceramic and Cabrio with Standard brake discs?? Those data isn't quite an apple for an apple comparision, is it???
Nevertheless, one would expect the ceramic discs to perform better as they don't have the heat problem compared to the standard discs...What a big difference at the 10th run!!!!!

[Ruergard]

Nice... at the last run the difference is big, really big! And after one run the ceramics perform as good as the normal ones and then better and better. Ceramics! :thumb:

[gjg]

what is weight difference between Cabrio and Avant? :eye:

[KK265]

what is weight difference between Cabrio and Avant? :eye:

In sport auto magazine, avant weight was 1770 kg and cabrio 1916 kg.Cabrio is 150 kg heavier...

[Fab]

That's the point guys.... we are comparing apples with bananas here not really accurate. Eventhough ceramics are obviously better but this is well known

[John Boggiano]

...but the standard brakes did amazingly well, too.

[ott]

I think it doesn't matter that one car was heavier. Just don't compare absolute numbers, but look at the trend, which shows that ceramics need to be heated to operate efficently, but during heavy usage there is no comparison with metal brakes.

[reimon]

Apart from those numbers, it was incredible to watch the photo after the test with the standard discs completely incandescent, while the ceramics look perfect, just with a little smoke coming out of the pads.

They said it was imposible to measure the temperature of the standard discs and the braking pedal was totally faded looking as if it was the clutch pedal, while the temperature of the ceramics was 490 Cº and still worked even better every time

[Erik]

Did they use the same tires?

[KK265]

Are there any scans?

[reimon]

Did they use the same tires?


Same tires: Michelin Sport Pilot in 19´ wheels

[7:53 RS6]

Same tires: Michelin Sport Pilot in 19´ wheels

But to very diffrent cars accelerating weight under braking.

Anyway i know that what ever stock rotor on my New RS4 it would make me more than happy! Still i would go for ceramics:dig:

[Leadfoot]

One shouldn't look at the differences between the two cars but look at the results from each. The ceramic brake improve with almost everytime it brakes while the standard brake get worst. I know on the road to difference felt would be little and not justify the cost but on a track where the heat will build I do see the advantages.

Only after sorting the brakes, the tyres will be the next thing that will need sorting.

[Fab]

yep ! and then your right leg :D

[Leadfoot]

Fab,

Are you sure you don't mean ability and courage.:D

[Fab]

well this concerns more your "3rd" leg :D

[Leadfoot]

well this concerns more your "3rd" leg :D


Well in that case I'm right up there with Michael Schumacher.:hahahehe:

Though don't ask the wife, she'll say I'm Formula Ford at best.:cry:

[Erik]

The french magasine sport auto in the #520 issue (may 2005) ad tested both the PCCB and regular brakes on the porsche 997 carrera s.
The test were performed on the Mortefontaine's auto facility (France) with speedway and roadtrack.

PCCB front : 350*34 mm, 6 piston calipers, yellow
PCCB rear: 350*28mm , 4 piston calipers, yellow
car's weight 1446kg
tires: michelin pilot sport 235/35 zr19 front & 295/30 zr 19 rear

Regular carrera s brakes front : 330*34 mm, 4 piston calipers , red
Regular carrera s brakes rear : 330*28 mm, 4 piston calipers , red
car's weight 1467kg
tires :michelin pilot sport 235/35 zr19 front & 295/30 zr 19 rear


tests were the following:

20 braking from 200km/h to 0, one lap of the Mortefontaine's oval speedway beetween each braking (3 km)
3 braking from 250km/h to 0, one lap of the Mortefontaine's oval speedway beetween each braking (3 km)
time attack on the Mortefontaine's inner roadtrack (ala Indiannapolis)


First test: 20 braking from 200km/h to 0

Carrera S regular brakes : 200km/h - 0 = 5 sec, 138 meters, 11.1 m/s of deceleration
20th braking : same numbers, efficacity loss : 0%

Carrera S PCCB : 200km/h - 0= 5.sec , 140 meters, 11 m/s of deceleration
20th braking : same numbers, efficacity loss : 0%

Winner : Big reds



Second test: 3 braking from 250km/h to 0

Carrera S regular brakes : 250km/h - 0 = 224 meters, 10.7 m/s of deceleration
3th braking : same numbers , efficacity loss : 0%

Carrera S PCCB : 250km/h - 0= , 226 meters, 10.6 m/s of deceleration
3th braking : same numbers, efficacity loss : 0%

Winner : Big reds

Third test : Time attack on track

Carrera s regular brakes : 1st signs of problem after 5 laps
Carrera S PCCB : no problems after 5 laps

Winner : PCCB

All the tests were performed in the order 1 - 2 - 3, without changing any part of the brakes.

[KK265]

I found another interesting test in this forum:
http://rs246.de/Forum2/viewtopic.php?t=496
Anybody for translation of the test?