Slotted Rotors

Donovan · Post by **Donovan** » Thu Jul 19, 2012 9:00 am

Quick question to see if anyone knows the answer, but with slotted rotors does it matter which part of the slot hits the pad first, being either the top leading edge on the outside of the rotor, or the bottom edge closed to the hub.

Normally it is dependant on the vent vanes, but the rotors I have vent from the centre out no matter which way they rotate, but someone has mentioned to me that I should still have the outer edge of the slot hit the pad first.

punkoutnz · Post by **punkoutnz** » Thu Jul 19, 2012 11:31 am

I've seen them set up both ways, I don't think it matters much at all.

Keith Jones · Post by **Keith Jones** » Thu Jul 19, 2012 12:43 pm

When I got my Big Brake set from Goodwin Racing it said that they should be set up with the outside edge of the slot reaching the pad first. Never tried it out the other way though to see if it makes any difference.

SLYDIT · Post by **SLYDIT** » Thu Jul 19, 2012 7:32 pm

interesting.... i would have thought the inner should touch first, that way it "scrapes" out wards the same as the centrafugal force

Donovan · Post by **Donovan** » Fri Jul 20, 2012 8:16 am

Oh well, can't seem to find anything that says there is any advantage either way, so couldn't be fagged changing the rotors around, they are left the way they are, bottom hub edge hitting the pad first.

Born_disturbed · Post by **Born_disturbed** » Fri Jul 20, 2012 9:57 am

SLYDIT wrote:interesting.... i would have thought the inner should touch first, that way it "scrapes" out wards the same as the centrafugal force

This is what i also always thought

Zadkiel · Post by **Zadkiel** » Fri Jul 20, 2012 5:05 pm

Yeah agree with the pushing gases outward way

WideOpenThrottle · Post by **WideOpenThrottle** » Sat Jul 21, 2012 9:40 am

Have a read

http://www.zeckhausen.com/how_to_proper ... rotors.htm

Donovan · Post by **Donovan** » Sun Jul 22, 2012 8:29 pm

WideOpenThrottle wrote:Have a read
http://www.zeckhausen.com/how_to_proper ... rotors.htm

Yeah, had read that before, my rotors are running a Kangaroo Paw system so they don't have vanes leaning in any direction and will vent inside out no matter which way the rotor spins.

By the looks of it, there doesn't seem to be any great advantage either way, as long as the cooling is right.

coxie · Post by **coxie** » Mon Sep 10, 2012 1:34 pm

probably bit late now but 4 future reference I purchased Big Brake kit from goodwin Racing was lucky enuf to have directional arrows embossed on each disc the OUTSIDE edge of the slots hit the calipers first bummer really as look far better wen inside edge hit 1st Gud Rotoring Coxie

Donovan · Post by **Donovan** » Mon Sep 10, 2012 3:03 pm

Was that the kangaroo paw DBA rotors or another set?

coxie · Post by **coxie** » Mon Sep 10, 2012 4:11 pm

Donovan wrote:Was that the kangaroo paw DBA rotors or another set?

No they Aren't DBA's they R the set U can see Im selling on MX5Forum as they wudn't fit inside my Enkei's

Donovan · Post by **Donovan** » Mon Sep 10, 2012 4:19 pm

Ahh, they are different from mine (your one's are crossed drilled as well?), as yours are directional vanes for cooling so have to rotate a certain way for them to suck the air thru, the DBA Kangaroo Pawed ones can go either way as far as the venting goes (or that's what they say). That's why your were embossed with the rotation direction on them.

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