what way do the slots on sloted and cross drilled rotors face
like this /
or like this \ this is on the driver side

 

Google is your friend...

http://www.stoptech.com/tech_info/faqs.shtml#16

 

stop tech says that the internal veins should face towards the back of the car at the top of the rotor. the brembo ones have non directional veins. they all face straight out from the hub.

 

So your question is???????????

 

mine shouldnt matter that the slots face up towards the back of the car at the top of the rotors and not foward like other cars i have seen

 

The grooves are cut to allow brake dust to escape the rotor. As the dust builds up between the pads and rotors, it creates more heat and a higher chance to warp the rotors. By having the slots on the front rotors face the front of the car you are actually forcing the dust into the rotor not away from it. You'll want the slots on the front rotors facing the rear of the car.

 

Wrong.....The slots are there to allow hot gases,not dust to escape though the slots,thus cooling the pad and rotor to allow better braking...Heat is what causes brakes to "fade"....

 

ok but my brakes are on the car correctly. and they work good now i just need to figure out the rear drums or to convert to disc

 

ding ding ding excess dust causes heat? ..........riiiiight

 

I can say neither MyGreenMax94 or myself is correct by ourselves. It is the combination of dust and gases that create the fade and heat. I'm not here for a pissing match, just here to help with I can and gather information myself.

 

very true the gas and the dust that is produced from heavy braking causes less stoppage, so the grooves in the rotor should face back to move the gas away and off of the rotor face so the pad and stay seated on the surface=better braking. the slots also cut the pads to keep a clean surface on the pads

 

I thought they just cleaned the dust off the rotor...

 

lol could be lol

 

my brake always sound noise when driving. How can i fix it? Thanks for replay

 

What kind of brakes? If they're slotted/cross-drilled they will make more noise than the stock disc brakes. It happens on my dad's car and I've been told its not uncommon for upgraded brakes to make more noise in exchange for more stopping power. I don't think there's a way to fix it.

 

My car has the disc brakes. Do you know what's problem with the noise? Thanks!

 

Probably the same as with mine. Some people have told me the problem was with glazed (permanently overheated) pads or a warped rotor rubbing together. Basically, there's no way to know unless you take the car in and get it checked out. Tell them not to work on anything unless they call you first. I wouldn't reccommend going to nissan, though. Charged me an arm and a leg just to tell me they can't find any noise. Give them a couple things to look for at the very least.