Most liked posts in thread: Backwards Brakes?

Slots dont matter in their direction. Only the vents, if directional, matter in their orientation for proper rotation.

 

Slots usually don't cross the vents, though. Not sure why they looked backwards. Usually they spin air from inside to outside.

 

Yep.......weird that there would be different designs for this. Powerslots are grooved to run inside to out and most others are from outside to in.

 

... and ATE's go both ways.

I don't think it makes any difference... they give loose debris scrubbed off the pads and any outgassing (mostly a thing of the past) somewhere to go.. Seems to me the gasses are going to flow from the middle of the braking surface both inward and outward when the pad is covering the slot... more heat = higher pressure... gas flows toward lower pressure... otherwise, there's not going to be a lot of air "flowing" through those slots one way or another... though, if they are backwards, they will make the car slightly less aerodynamic. :smilewinkgrin:

 

.....creating a dreaded rotationally challenged state....

 

Yeppers. Look at Stop-tech versus EBC rotors. The slotting faces different ways but the vents on the inside of the rotors go the same way.

 

Also the 2011 R56 standard brakes that are cross drilled/slotted.... One rotor, used for both sides, but have straight venting vanes.

This is THE PASSENGER SIDE:




I guess them there BMW/MINI engineers dont care about this supposed "centrifugal force" (aka voodoo magic).

 

I'm looking for a study on the effects of centrifugal force (or centripetal force) on the effectiveness of brake rotor slots, but, alas, I can't find any.

If you have so much debris being scraped off your pads each revolution that one of the "c" forces is a major factor in clearing it out of the slot... then you may have bigger problems...