d.h

Just received my full set of rotors from them yesterday. I was reading the instruction and was little confused by it.

It said to install it so the slot is scooping in the direction of the rotation. I always thought the slotted line is in a slicing motion. Any input as to why? Would it do much harm the other way regardless of the instruction?

(If I didn't express the picture clearly, think of the slotted line from inner to outer edge pointing left)

pierceman

The heat from the rotors will not escape as well if you do it backwards and may cause warping. did you need help telling which way to do it?
MAtt

TryPsi41

Those are really nice rotors! Just checked out their websites. Cheap pricing too !

I wonder how much better they are on the track than stock.

d.h

Looking back at some picture now, I realized the way people installed it is about half/half. I guess I never paid attention to the other half all these time. So do this differ from car to car, or rotor to rotor?

nitewing117

the ones that were installed on my car by the previous owner are in the same direction as the pictures above.

pierceman

I thought you were talking about the air vents on in the center of the rotors. for the slots it does not matter, however, the air vents 100% DO matter.

d.h

I ordered the 1-piece cast iron rotor from Science of Speed, so there are no vent in the middle of the rotor. The instruction still mention to have optimal performance, install it in the scooping down direction. I guess I can install it anyway I want if the it doesn't make much difference. That's what my true question is.

Danks2k

From pictures I have seen it should not matter as long as the vents are not direction in the rotor. I have seen them go both directions. I have ATE rotors and their design has them going in both directions on the same rotor so should matter.