I don't think it was attached to a drill.

 

That would sound better then

 

Mine was caked in the holes so bad that I would have gone through a lot of brake cleaner. I took the rotors off the car and scrubbed the pee out of them then cleared all the holes. Looked brand new when I was done.

 

I blow mine out with compressed air every now and then. Works fine.

 

That is what I do as well, just wear a mask when you do it

 

Using a drill bit that is slightly smaller than the holes made the job quick and easy. Once the wheel is off it takes all but 2 minutes to clean the holes out and with a drill bit you can get both sides of the rotor at once.

 

I'm doing this right now and WOW those lil holes were caked in with brake dust. You'll be surprised on how much built up compounded dust comes outs. Looks just like yours caymandiver. Mine have 14k miles and never a track day
I used a 1/8 drill bit. I had to use a bit of umph on some of the front holes. The rear rotors weren't nearly as bad

I actually feel better now, feels like I'm helping my baby breath alil better

 

I use a 5/16" drill bit attached to my drill. It gets the pad material and the rust too. I have to do this after every track weekend.

 

Something to watch out for, thanks for the tip!

 

i believe the very original intention of holes was to reduce rotor weight. I agree it's more of a fashion statement for street cars.

 

I believe the holes were to provide a outlet for pad outgassing during racing applications. They do look better than solid rotors behind open spoked wheels.

 

They would just make them thinner. But they need the mass. Porsche say it's for cooling and better performance in the wet.

The holes have a purpose, and it's always a very hot internet topic, with much bull**** getting thrown around. Drilled discs are on virtually every supercar around, so they couldn't be that bad lol!

I'll stay out of this one I think....

 

Pads don't outgas anymore. They haven't since the 80's.

They crack easily. They don't cool better that anyone has proved to me via thermal paints on the rotors showing reduced operating temperature. The holes fill with brake dust and clog, so claiming better airflow through the ventilation system is also highly suspect.

Drilled discs are on many cars for fashion. Supercars have carbon - carbon brakes, so the hole arguments are meaningless.

 

That's true for today's pads but the statement was about the "very original intention of holes". At one time it was believed that water pooled in the holes which reduced braking effectiveness in the wet.