Rotor Help. which way do they go?

[tamdo714]

i recently go cross/drilled rotors and they came in a box and they wrote if it went on the front passenger, front driver etc. but my dad through away my boxes. so i need help. i looked at some pictures and i've seen the rotor go both ways. which why do they go? and does it matter? thanks

this is an example of the Front passenger. so which one?

A. B.

and which ever it is, does the rear go the same way? thanks!

[RatedR]

If you look at the fins from the side of the rotor, they should be digging into the center of the rotors. That's presuming that the fins are directional, meaning they are slanted and you cant see down into the center. I believe most of the rotors offered for the S chassis are straight, they're not directional, shouldn't matter if you want to flip them.

[S14-KOUKI-MONSTER]

The top pic is the passenger side.The bottom pic is the driver's side.

[S14-KOUKI-MONSTER]

Oops................front & rear are the same.

[Defiant]

Yeh, which way. If there are curved internal fins, they should always sweep outward, so that the natural flow will be to scoop air out from the hub, aided by centrifugal force. If the internal vanes are straight, the direction won't matter to them. The idea is that you're trying to pull cooling air out through the rotor and a spinning disc will try to sling the air out by itself. Trying to "scoop it in" will be fighting that natural flow.As for slots, grooves or drill patterns, go with what the manufacturer says. I'd always thought that you'd still want to have centrifugal force helping the slots to sweep out gasses, water and debris, but Brembo says to have theirs sweep "in". Beats me. But I'm not above suspecting the engineers designing and building things just might know more about their products and their use than I do.

[adrianfromthecastle]

it doesnt matter which direction the slots go.

[tamdo714]

haha thanks guys!

[S14-KOUKI-MONSTER]

I can't even count how many brake jobs I've done using slotted, or drilled rotors including my own car. On every set I've done, the companies recommend the way I mentioned above. If you won't take my word for it call the company that made them.

[94_240sx]

Okay, I've looking at cars in the magazine and web sites and this is what I found. A is driver's side and B is passenger side. Some people say that it doesn't matter, but that's the pattern I've found. Concept cars, show cars and racing cars.. They have rotors that way. Interesting...

This picture is from SPL website and it's a shot from driver's side. Hope this helps...