Wear on ceramic discs after 12k miles

[1hardwork]

Hi,

I'm just about to purchase a Portofino with around 12k miles on. I noticed on the 190 check trhat the ceramic discs have a wear of 18.6 on the front and 11.6 on the rear. Does this sound normal? I'm sure the ceramics on my 911 turbo were no way near those figures with 30k on.

[R8Reece]

I thought you could only measure ceramic disc wear by weighing them?

[1hardwork]

I’ll check with the dealer tomorrow and find out what those figures represent🤷🏼‍♂️

[ANOpax]

R8Reece said:

I thought you could only measure ceramic disc wear by weighing them?

You’re correct that the only true way to know the wear is to weigh them. However, to save that hassle, the car’s computer keeps a log of brake usage and creates an estimated wear figure.

[ANOpax]

1hardwork said:

Hi,

I'm just about to purchase a Portofino with around 12k miles on. I noticed on the 190 check trhat the ceramic discs have a wear of 18.6 on the front and 11.6 on the rear. Does this sound normal? I'm sure the ceramics on my 911 turbo were no way near those figures with 30k on.

Ferrari CCB’s are only expected to last about 125k km. That’s c.77k miles. If the car has done 12k miles then that’s 16% of the expected disc life. The computer estimate of disc wear seems about right.

[Mogul]

What’s the reasoning behind weighing the discs to determine the wear?

Curious to know how they can lose mass without a proportionate reduction in thickness...

[F355GTS]

I expect the numbers quoted are percentage wear. They do see ma little high for the miles, I suspect the car may have done a trackday

[Caddyshack]

Mogul said:

What’s the reasoning behind weighing the discs to determine the wear?

Curious to know how they can lose mass without a proportionate reduction in thickness...

I am guessing that maybe they get heavier and not thinner by taking on pad material?

[ANOpax]

Caddyshack said:

I am guessing that maybe they get heavier and not thinner by taking on pad material?

No. They get lighter.

A brand new disc has a smooth and uniform surface - almost mirror like. Within that surface, you can see the carbon matrix and ceramic wear material. As the disc wears, the wear component (ceramic I believe) is worn out from between the carbon matrix. You can see the effect in the photo of my car’s disc below. They’ve done approx 20k miles.

[Mogul]

Just found this...

https://www.google.co.uk/amp/s/aldousvoice.com/201...

Seems like they lose weight as bits flake off but the overall thickness may not decrease (max permîtes is a barely measurable 0.5mm in any case).

[Order66]

When I bought my 458 at 9k miles the Ferrari Dealer doing the PPI said the discs were 1 to 2% worn. How they got that figure I have no idea, but in any case I took it as a sign not to worry.

[R8Reece]

ANOpax said:

R8Reece said:

I thought you could only measure ceramic disc wear by weighing them?

You’re correct that the only true way to know the wear is to weigh them. However, to save that hassle, the car’s computer keeps a log of brake usage and creates an estimated wear figure.

Ah thanks. Every day is a school day.

[Heart and Soul]

Would a couple of track days significantly increase wear on ceramic discs?

[ANOpax]

Heart and Soul said:

Would a couple of track days significantly increase wear on ceramic discs?

Not just discs but pads as well.
That’s why track day warriors switch to steel rotors and pads.

[F355GTS]

Heart and Soul said:

Would a couple of track days significantly increase wear on ceramic discs?

A hard Goodwood day in my 599 saw 12% wear

[NSC79]

In addition to the brakes, has anyone got a list of what the 190 point check includes?

Cheers

[Caddyshack]

ANOpax said:

Caddyshack said:

I am guessing that maybe they get heavier and not thinner by taking on pad material?

No. They get lighter.

A brand new disc has a smooth and uniform surface - almost mirror like. Within that surface, you can see the carbon matrix and ceramic wear material. As the disc wears, the wear component (ceramic I believe) is worn out from between the carbon matrix. You can see the effect in the photo of my car’s disc below. They’ve done approx 20k miles.

Thanks, that makes perfect sense.

[TP321]

F355GTS said:

A hard Goodwood day in my 599 saw 12% wear

Bloody hell ...that’s ridiculous

[Oitbc]

NSC79 said:

In addition to the brakes, has anyone got a list of what the 190 point check includes?

Cheers

Yes - send me a PM and I will send to you