[stlwagon]

I have to admit I'm not smart on which is better or even if one is better than the other. Please share your experiences.

[travelers]

I have the Powerslot Rotors front and back which are slotted. The slotted ones get rid of the gasses that build up from friction heat. I read somewhere when I was looking for which ones to get that some of the drilled ones tend to crack at the holes. So I just went with the slotted. They work great with the Hawk HPS pads. After hitting the brakes once or twice you really feel a difference. The first two hits just feel like stock.

Its a shame we don't live closer, I would let you try them out.

I'm having to edit out some items in my sig. It seem to be to long.

[mrvandermey]

I have drilled and slotted.....my car stops on a dime with $.09 change....the drilled and slotted alledgedly cool faster, but I have heard the drilled are more brittle (not sure).

GT500 uses slotted only...so maybe that means something.

[06hoss]

I still have stock rotors, but I've heard the same thing Travelers and Mr. V said about drilled...the can crack. I think the slotted and drilled looks cooler, but when I go to big brakes I won't do drilled because I'm concerned about the integrity of the rotors once you drill them. I saw one manufacturer (can't remember the name) that makes slotted and DIMPLED rotors that look like they're drilled after the dust gets in the dimples. I have waited on big brakes until I make up my mind if I'm going to add a blower or not, but if I do, I think I'm just going to get GT500 front rotors (bigger of course) and pads up front and GT500 pads in the rear (different compound and they will fit our calipers). Then when I do need brakes, I can still go to the local Ford dealership for the work if I want.

[tw0scoops123]

Originally Posted by mrvandermey

I have drilled and slotted.....my car stops on a dime with $.09 change....the drilled and slotted alledgedly cool faster, but I have heard the drilled are more brittle (not sure).

GT500 uses slotted only...so maybe that means something.

I've heard the same, that drilled are more brittle because drilling the rotor will descrease the structural integrity of the rotor. It's still better than a standard rotor. But I think slotted are definately better.

PS I have never had any exp with either. Just from what I read about both.

[pcfrisch]

Brembo Frequently Asked Questions

Why use drilled or slotted discs?
Drilling or slotting discs aids the disc in several ways:

• The edges of the slots or holes continuously clean and refresh the pad surface as well as providing increased brake "bite". Additionally, they prevent gasses from collecting between the pad and disc interface.
• The disc is lightened, thereby decreasing its rotational inertia.
• Improved ventilation increases the disc's ability to shed heat, resulting in cooler operating temperatures

BACK TO TOP
What are the advantages of drilled and slotted discs?
The main advantages of drilled and slotted discs are the same: increased brake "bite", and a continuous refreshing of the brake pad surface. Drilled discs have the additional advantage of being lighter and running cooler. However, there are certain pad materials that should not be used with a drilled disc.
BACK TO TOP
Why are there so many holes in a cross-drilled disc?
The number of holes in a cross-drilled disc is part of the engineered system. Brembo has done extensive testing with regards to the number of holes, their size, their location and their chamfering. This attention to detail is what truly sets Brembo apart in the world of braking. The same attention to detail that is delivered to the Ferrari Formula One effort is a component of the high performance program. The number of holes in a disc is in part a function of the size of the disc and the internal venting (if it is a vented disc).
BACK TO TOP
Are discs with cast-in-place holes better than cross-drilled discs?
Brembo has extensively studied and tested cross-drilling versus casting the holes in place and found no significant effect on performance or durability.

[stlwagon]

Originally Posted by pcfrisch

Brembo Frequently Asked Questions

Why use drilled or slotted discs?
Drilling or slotting discs aids the disc in several ways:

• The edges of the slots or holes continuously clean and refresh the pad surface as well as providing increased brake "bite". Additionally, they prevent gasses from collecting between the pad and disc interface.
• The disc is lightened, thereby decreasing its rotational inertia.
• Improved ventilation increases the disc's ability to shed heat, resulting in cooler operating temperatures

BACK TO TOP
What are the advantages of drilled and slotted discs?
The main advantages of drilled and slotted discs are the same: increased brake "bite", and a continuous refreshing of the brake pad surface. Drilled discs have the additional advantage of being lighter and running cooler. However, there are certain pad materials that should not be used with a drilled disc.
BACK TO TOP
Why are there so many holes in a cross-drilled disc?
The number of holes in a cross-drilled disc is part of the engineered system. Brembo has done extensive testing with regards to the number of holes, their size, their location and their chamfering. This attention to detail is what truly sets Brembo apart in the world of braking. The same attention to detail that is delivered to the Ferrari Formula One effort is a component of the high performance program. The number of holes in a disc is in part a function of the size of the disc and the internal venting (if it is a vented disc).
BACK TO TOP
Are discs with cast-in-place holes better than cross-drilled discs?
Brembo has extensively studied and tested cross-drilling versus casting the holes in place and found no significant effect on performance or durability.

Good info Pete!

[RetroGT2006]

Ive heard of just taking the stock rotors and having them slotted.. i heard it helps a littlebit.. is this true, and can you do it? is it even worth the money, or should yah just buy all new brake kit?

[jeostang]

Brake Tech - Brake Rotors and Track Use

Ever wonder why F1, Indy and I think NASCAR do not use them?

[EagleAutosports]

The drilled rotors tend to get stress cracks between the holes when pushed too hard. The slotted in theory is supposed to vent the gases and brake dust to keep the pads from glazing but without the stress cracks. For a street car, either will work fine. I've seen a drilled rotor separate at speed, the drilled holes acted like a perforation seam between your paycheck and the stub.