Hey Ive herd that with cross drilled rotors, ur pads wear faster, and the discs might crack. I wouldnt exactly call myself a heavy braker, I just do normal breaking, and of course the occasional hard hit from well above legal limits as I spot speed traps and what not ahead, but other than that, I really dont have any roads to haul on and I dont do autoX so do I really need to worry about the cross drilled warping or cracking? I really want the look of cross drilled and slotted. I know that slotted is really good as well......but like i said its about the looks. If its not a problem what is a good brand to get other than eradispeed, and if its a bad idea, what is a good company for some slotted rotors? I was looking at powerslots, on sale at lmperformance!

 

just street use you might be ok for a while with the drilled.
you can help them not crack by getting them cryo treated, its kinda expensive, and I cant remember where I saw that.

you will not gain any braking performance from slotted and or drilled. (I know some will dispute this with me, but I just will not accept that less surface area will brake faster)

the extra wear is minamal as well.

I'm not sure on the best place from them either, as I recomend a just a blank rotor and good pads. and then replace the rotors more, cause better pads generally eat the rotor faster.

 

Keith at WS6.com has an interesting page on the Baer cross-drilled rotors, and the extension of rotor life with cryo treating from "300 Below".

http://www.ws6.com/cryo.htm

The interesting thing is, without cryo treating, one rotor cracked in 4,000 miles. The cryo'd rotors only lasted 19,000 miles. Not sure that I would even consider cross-drilling after seeing the pictures. Although I do have the Baer cross-drilled rotors in the back, and they've been there for about 5 years.... but not many miles, since its only a "track" car now. No signs of cracks after pulling the car down from a few 125+MPH passes.

 

thats the site there.


one reason the rears wont crack very easy is the fact that they only do 30% of the stopping.

 

I use Brembo cross drilled and slotted rotors. The purpose of cross drilling has nothing to do with making your car stop faster. Cross drilling's main purpose is to provide additional cooling to prevent brake fade under heavy braking usage.

 

it will be a cold day in hell befor I believe that drilling will cool faster without brake ducts.

modern pads do no need them to "vent gas"

and without brake ducts I think that the drilling would make htem more prone to fade as there is less material to hold the heat.

also there is less friction area for the pad to stop with......

I do not buy into the drilling for anything past looks on a street car.

 

I can understand both sides in this debate. And frankly I'm on the fence on this one. Reason being, I recently installed cross-drilled on my project car. I never heard of the cracking issue until now. I guess I'll have to wait till years end at least, to see which side I believe.

 

for what it's worth Wilwoods website says that driling and slotting doesn't do anything.. they sell and make both and I'd figure they would know..