Advice on brake discs please

[mcbutler]

Just google the question. There are many race teams, brake specialists etc who give advice on youtube etc.
Generally its slotted only as drilled are purely aesthetic.
Most say that slotted are the only option as drilled give uneven wear, crack etc.
Drilled discs on race cars are not seen.
Don't forget, the more grooves, dimples or holes the more friction surface you lose, six grooves max.

 

[Gaffa22]

Bike discs are often two piece as well which adds to the price astronomically.

Yes indeed and they are "floating discs" which also adds to the cost

So are the drilled carbon and ceramic discs you see on high end sports cars for aesthetics rather than function ?

 

[flybobbie]

I can see how grooves might act to reduce scratching, wear, gases, but what happens when they are full of crud.
Keep in mind racing they probably replace every race.
Would have thought drilled better.
But does drilling effect the cooling of the disc regards flow from the centre to the outside rim?

 

[Gaffa22]

Would have thought drilled better.
But does drilling effect the cooling of the disc regards flow from the centre to the outside rim?

you'd think there must be some additional cooling effect, but its a trade off against loosing surface area