Cross Drilled, Slotted, Both...

[Bald0]

what are the advantages or disadvantages or cross drille brakes and slotted brakes?
and what are the advantages or disadvantages of having both?

[Verrückt]

Originally Posted by Bald0

what are the advantages or disadvantages or cross drille brakes and slotted brakes?
and what are the advantages or disadvantages of having both?

Cross drilling is for bling, weight, and pad bite. It really doesn't add much to performance or heat dissipation...and they all WILL crack at the holes eventually.

For serious track use, skip on the cross drilled.

Slotted is the best all around. The slotting assists in keeping the pads clean.

If you just want the brakes for bling, get the drilled and slotted at the same time.

If you will actually be hard on the brakes, avoid cross drilled rotors.

[paradox]

wow i never new that to cross drilled didn't have much effect thanx for the advice i will try and get slotted. does anyone know if the rotors on a wrx/str are slotted or what?
Jake

i wanted to take the entire rear spindal out of the wrx b/c my current car had drums and i wanted to replace thoes with discs and switching the rear spindals (i think) is the best way to do that.

[stew]

depends on the discs and how the holes are made. if they are cast like that, they will last longer. its the holes are drilled after the disc has been cast, then stress cracks will appear.
although stress cracks can appear on discs with the holes cast(porsche)

[Verrückt]

Cast Movit rotors...

[nismoron]

The resaon for drilled or slotted rotors is for cooling and to release heated gases trapped between the pad and rotor. As these gases (small amounts of air and chemicals in the pads) get hotter and expand. They can lift the pad off of the rotor by minute amounts. The holes and slots give tha gases a place to escape.

Oh and the drilled/cast holes DO crack, in almost every case!

[Verrückt]

Originally Posted by nismoron

The resaon for drilled or slotted rotors is for cooling and to release heated gases trapped between the pad and rotor. As these gases (small amounts of air and chemicals in the pads) get hotter and expand. They can lift the pad off of the rotor by minute amounts. The holes and slots give tha gases a place to escape.

Oh and the drilled/cast holes DO crack, in almost every case!

Gassing used to be a problem with pads years ago, but it isn't an issue anymore.

If F1 cars don't need it...neither do you.

[nismoron]

Originally Posted by Verrückt

Gassing used to be a problem with pads years ago, but it isn't an issue anymore.

If F1 cars don't need it...neither do you.

Gassing is still a problem on street driven cars, especially with cheap parts store pads. Formula 1 cars use carbon pads and rotors that dont have inherent gassing problems.

To surmise... Drilled rotors are poiintless and slotted rotors allow gasses and brake dust to exit the pad surface under braking. They are functional, but only marginally so on a street car. Mostly, both are for looks.

[Verrückt]

Originally Posted by nismoron

Gassing is still a problem on street driven cars, especially with cheap parts store pads. Formula 1 cars use carbon pads and rotors that dont have inherent gassing problems.

To surmise... Drilled rotors are poiintless and slotted rotors allow gasses and brake dust to exit the pad surface under braking. They are functional, but only marginally so on a street car. Mostly, both are for looks.

I agree with that.

[Sick srt-4]

Originally Posted by Verrückt

Gassing used to be a problem with pads years ago, but it isn't an issue anymore.

If F1 cars don't need it...neither do you.

Do you NOT notice the grooved rotors ? And also the rotor color? It's all special compounds, also they are usually TOSSED after every race.


You want good stopping power. Either get HAWK or Performance Friction pads, and SLOTTED rotors.

MOST pads now are "Slotted" to help rid dust and gassing.

[robz95xj]

Originally Posted by Verrückt

Gassing used to be a problem with pads years ago, but it isn't an issue anymore.

If F1 cars don't need it...neither do you.

Thats gorgeous lookin header.

[thedguy]

I'm going to repeat what everyone else said. Slotting is the most you need. Every article I've read on brakes says drilled are utterly pointless these days (and have been for decades). Some will even say slotted aren't needed, but are good if your car see's decent track use as the slots will help keep the pads from glazing.

[Verrückt]

Originally Posted by Sick srt-4

Do you NOT notice the grooved rotors ? And also the rotor color? It's all special compounds, also they are usually TOSSED after every race.


You want good stopping power. Either get HAWK or Performance Friction pads, and SLOTTED rotors.

MOST pads now are "Slotted" to help rid dust and gassing.

They aren't grooved. Carbon fiber is naturally rough. This helps with pad bite.

They also aren't tossed after every race. They aren't "special" compound either. The rotor ring and the pads are carbon.

[Verrückt]

Good link for info.

Another

[CRISTIAN]

I have a question related to brake pads: can you change them safely with your bare hands without wearing any kind of mask?

the reason i ask is because someone told me brake pads have asbestos in them or something and the brake dust is very dangerous stuff.