What's the pro's and con's of drilled vs. slotted rotors. Id get drilled/slotted but they're a bit much.

Also how are the stock civic si 00' brakes? If they're already one of the two I might not upgrade

 

It used to be that drilled rotors were the only thing available and are highly regarded for their racing look. As you can imagine, drilling a lot of holes in a rotor creates a lot of stress ridges. While I have no experience with them on Hondas, Porsche racers have been known to have drilled rotors crack from fatigue. The holes are also supposed to make the rotor lighter and cool better. I have heard no evidence supporting this.

The groved rotors have the benefit of giving gases an escape route without significantly affecting the structural integrity of the rotor. In theory, they also give the pad and edge which to bite when the brakes are applied. Everyone that I know who races Porsches uses the slotted rotors. I have the drilled rotors because they match the period look of my street car. In other words, do you want to look cool, or reliably stop fast?

Rich

 

rowsc is right, it was initially done to let the gases escape from between the pad and the rotor. Modern brake pads don't create much gas, and thus it is not necessary. Porsche and Ferrari put them on their car simply for looks at this point although it's not necessary, it sells, and so they use it. As far as cooling, while increasing the surface area of the metal to cool it is useful, you lose heat capacity by drilling out the rotor and thus losing a decent amount of material. Yes they are lighter, but you do run the risk of cracking them, and if left unchecked, outright failure. Not worth the money, just go with standard rotors.

If you're roadracing and having trouble with brake fade, it's time for some bigger brakes. Plenty of options if you're driving a civic. :hi5: