Tungsten carbide coated brakes

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roon
roon
412
Joined: Sat Dec 17, 2016 6:04 pm

Tungsten carbide coated brakes

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World premiere of the Porsche Surface Coated Brake

In the new Cayenne, Porsche is launching an innovative new braking technology: the Porsche Surface Coated Brake (PSCB). At the core of this new technology are discs with an exceptionally hard tungsten-carbide coating, combined with specially developed brake pads. Compared to conventional grey cast iron brakes, the new system boasts far superior properties - including an up to 30 per cent longer service life. The discs not only wear at a significantly slower rate, but also generate less brake dust accumulation on the rims. The increased friction values of the brakes also ensure improved responsiveness. The PSCB delivers stable braking even under extreme stress. As with the Porsche Ceramic Composite Brake (PCCB), which is still available as an option, the PSCB uses ten-piston callipers at the front and four-piston callipers at the rear.

A side effect of the new technology is the unique appearance of the coated discs. After around 600 kilometres of day-to-day driving, the pads will have polished the surface to a gleaming shine, creating a mirror-like finish. The aesthetic effect is enhanced by the white brake callipers. The PSCB is included as standard on the Porsche Cayenne Turbo, and is available as an option for all other Cayenne models. The PSCB is available in combination with 20 or 21-inch wheels.
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J.A.W.
J.A.W.
109
Joined: Mon Sep 01, 2014 4:10 am
Location: Altair IV.

Re: Tungsten carbide coated brakes

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Kawasaki G.P. bikes of ~45 years ago featured tungsten plasma sprayed Al brake discs..
This development was in response to the early Fe discs being massive enough to impair steering/handing..
"Well, we knocked the bastard off!"

Ed Hilary on being 1st to top Mt Everest,
(& 1st to do a surface traverse across Antarctica,
in good Kiwi style - riding a Massey Ferguson farm
tractor - with a few extemporised mod's to hack the task).

Scootin159
Scootin159
9
Joined: Thu Aug 06, 2009 8:09 pm

Re: Tungsten carbide coated brakes

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So the #1 benefit is that they last 30% longer. If they cost more than 30% more (which I'm sure they do), why not just run grey cast iron discs, and replace them 30% more often?

Just_a_fan
Just_a_fan
561
Joined: Sun Jan 31, 2010 7:37 pm

Re: Tungsten carbide coated brakes

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It's not just wear. Improved friction and bite are big factors in braking.
The discs not only wear at a significantly slower rate, but also generate less brake dust accumulation on the rims. The increased friction values of the brakes also ensure improved responsiveness. The PSCB delivers stable braking even under extreme stress.
Turbo says "Dumpster sounds so much more classy. It's the diamond of the cesspools." oh, and "The Dutch fans are drunk. Maybe"

jz11
jz11
19
Joined: Tue Sep 14, 2010 8:32 pm

Re: Tungsten carbide coated brakes

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When the first thing that promo states is how much less brake dust accumulates on the wheels and also mention how shiny the brake disc surface becomes after some use, I think the rest are just a side effects, since the first 2 reasons to buy these significantly increase the BpB* value of the whole car

* Bling per Buck

roon
roon
412
Joined: Sat Dec 17, 2016 6:04 pm

Re: Tungsten carbide coated brakes

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Perhaps the most important feature is that, due to the perfectly smooth faces of the brake disks, they no longer require any brake lubricant. I'm not an expert on the topic, but I know that choosing the correct viscosity is crucial. Too thin, and the hydrodynamic layer between the brake pad and the disc is lost, resulting in unwanted friction and a rapid increase in heat. Rarely though does a vehicle ever require more than one application. All this guesswork can now be eliminated.