Are My Rotors Facing Wrong?

[racerxmd]

Did a search and found rotors with slots facing front and aft. So which way should the slots on rotors face once installed? For example: Driver's Side = slot rotating to the Right or Left?

[ddawson]

Slot's don't matter. Wilwood goes forward and backwards, Powerslot goes forward.
ATE uses a star pattern.

If the veins inside are directional you want to pull heat away. If they are straight it doesn't matter.

[racerxmd]

So which pic is correct for the slotted rotors?

[JACook]

It's kinda a religious issue, some like it one way, some like it the other. To me, since slots
are supposed to give dust and outgassing a place to go, it makes more sense to have the
slots sweep toward the outside of the rotor, rather than toward the inside.

But I have no hard data to back that up, so it's just opinion. I prefer to run plain rotors...

[19COBRA93]

This may help:

http://www.zeckhausen.com/how_to_pro...all_rotors.htm

It doesn't reference non-vented rotors though. But that last pic looks backwards if you ask me.

[82GT_t-top]

The Tories may be marked for the correct side they are supposed to go on but some people get left and right mixed up when it comes to replacement parts. Not to soy.d mean but I had an older gentleman arguing with me about the left and right issue, so I asked him where his left front turn signal was and he pointed to the driver front of the car. So I then asked him how that was the right side of the car. Anyway the rotors should be marked with an L or R, or with directional arrows.

[wraithracing]

The front looks correct to me. The rear rotor appears backwards to me. I can't guarantee it's correct, but it appears the part number on the rotor has a L at the end. If the other side has an R at the end, then you know for sure they are on backwards.

Good Luck!

Trey

[racerxmd]

This is how I have mine on:

[racerxmd]

Looks like I might need to swap them so the rotors slots are rotating towards the rear. Is that correct?

[JACook]

Presuming those last two photos are the driver side of the car, I would have those rotors
on the passenger side.

[ford427r]

The pics you have, the first pic is correct the second one is wrong. Swap the rears.

[racerxmd]

Thanks, So first pic in post # 3 is correct? I will be swapping them tomorrow for sure. Hope you can understand why I placed them the way I did.

[85GT-79FJ40]

If it's a vented rotor the actual cooling vanes between the friction surfaces might be directional. If they aren't directional the machined slots can go either way but it's more traditional for the pattern to sweep outwards. I've heard some claims that if you go the other way you get more "bite" from the pads. Interestingly enough I recently noticed some late model BMW's with stock slotted and drilled rotors use the same part number for left and right rotors. So one side would be sweeping inward and the other outward. I haven't had a chance to look closely at a 1M coupe since I noticed that in the BMW parts program but it seems that's how it would be. And that's a car which is basically set up for track use out of the box.

[racerxmd]

O.K. I removed my front wheels Again to check for any markings of arrows or left/right on the rotors. What I found was that my Aerospace Heavy Duty Front Brakes that are Vented/Drilled/Slotted had small arrows showing the correct rotation on the outer surface area of the rotors. I had second guessed my first install which turned out to be correct. The rotors show a rotation arrow pointing towards the front of car. Which makes since, because you want the heat to be Pulled Away from calipers instead of Pulling Towards the Calipers. Thought this might be helpful to someone. Sometimes you over look the small things. Be Safe!