I just buy some slotted an drilled rotors. Well I'm going to installed them in morning, but Here my question: Does it matter which way slotted line go? I mean clockwise or counter clock wise?

 

<- "/"
arrow is the direction of rotation

 

When i installe my rotora slotted, I contacted Rotora. They say, it doesn't matter which way you put.

if you put <- "\" (arrow direction of rotation), the way they recommend, you get the maximum breaking potential, but it will wear out ur pads faster. If you look at the pictures on their site, they have them this way

if you put <- "/" (arrow direction of rotation), you will still get better stoping power, but not as much as <-"\", but less pad wear.

 

Agreed. Contacted Rotora with the same issue when I noticed all other brands of slotted rotors that I'd seen had the slots pointing backwards "/" while Rotora's instructions recommended forwards "\"

 

ther eisnt a wrong or a right way. both ways have exceptional braking, just one way will wear the pad faster than the other due to the more aggressive cutting/degassing action

 

^ agreed

 

When i complete stop i hear grind noise comming from my rear driver side wheel.
This happen only when i complete stop if i slow stop an don't feel a thing. All the other 3 wheel make no noise sound work perfect. Also i pump my brake before started little hard but ok. What causing this grinding noise?

 

You have to seat the brake pads. Search. There are some instructions that fsttyms1 left on an old thread. I sure on that...

 

 

If the inner vanes on the rotors go straight out, and are NOT directional, then it does NOT matter which way they go on. The rotors wont overheat either way

The whole idea about mounting rotors with directional vanes properly is for air flow/cooling purposes. Since these rotor vanes are non directional and go straight out, it doesnt matter which way you mount them as airflow will be the same.

In this case, with non directional rotors, mounting them so that the slots fall forward toward the front of the car is beneficial for better scrubbing of your brake pads. On my car I have the rotors mounted the other way. I wouldnt chanhe yours though unless you noticed any wobble from uneven brake pad distribution.

Here a link from Baer Brakes themselves.

http://www.baer.com/support/TechTips.aspx?TechTipID=2