Originally Posted by slam1918 (Post 2791603)

Funny Z1 tech told me on the phone cooling vanes in between the rotor surfaces go toward the front to scoop air and assist in cooling but I will triple check with them. Maybe if Z1 is peeking in on this site they can chime in. The pic is front & rear but thanks for pointing that out. I'll confirm today.

Originally Posted by Sh0velMan (Post 2791719)

A key point that may be being missed in those articles vs this discussion: It's internal vane orientation that matters, not the slots on the outside. So you gotta be sure the internal vanes are pointed the right direction.

Originally Posted by Sh0velMan (Post 2791719)

A key point that may be being missed in those articles vs this discussion: It's internal vane orientation that matters, not the slots on the outside. So you gotta be sure the internal vanes are pointed the right direction.

Originally Posted by FPenvy (Post 2791715)

i mean i could always just go look at my stock rotors and tell you which way they go lol

Originally Posted by edconline (Post 2791926)

Those articles were reference internal vane orientation... The forum link was to the racing brake forum where they said exactly that, the slot on the outside doesn't matter but ALL CURVED INTERNAL VANES must run with the vane angled towards the rear for proper operation. I have a feeling they know a thing or two about brakes.
Right now his rotors are opposite to that. It just makes good sense when you think about it too, sucks air from the center of the rotor, through the hot rotor and out the edge away from it. If it 'was sucking air in' as apparently the Z1 tech suggested, it comes across the hot rotor to the inside and goes... Where?

Edit:
From the first link I posted:
"Rotors with curved vanes, however, are directional and must be positioned properly to achieve full heat dissipation. With curved vanes, the rotor must be mounted with the vanes angled rearward, which results in a centrifugal pumping action. This causes hot air to be pumped from the center area outward. "

From the second link:
"Rotors with straight or pillar vanes are non directional. Direction of cross drilled or slotted rotors can be installed on either side as long as the front and rear match.

A curved vane rotor is directional and must be installed as left and right. The vanes sweep backward from the inside running back toward the rear of the car."

Third link:
"Some higher performance cars come with "directional rotors", which have curved or tilted internal cooling vanes. These curved vanes pump more air through the rotors, resulting in improved cooling efficiency. Thus, there is a left and a right rotor. When the directional rotors are properly installed, these internal vanes should lean toward the back of the car - as shown in the diagram on the lower left."

Waiting for Z1 to chime in and explain why their curved vane rotors are apparently supposed to spin opposite to every other curved vane rotor on the market.

http://www.the370z.com/members/edcon...rientation.jpg



That probably wouldn't help as IIRC the stock rotors are straight vane design.

Originally Posted by Sh0velMan (Post 2791972)

Yes, I'm glad that you agree with me.

Originally Posted by edconline (Post 2791974)

LOL. I just re-read your post and was like :werd: The 'May be being missed' was too much for me when I read it this morning, just came off an all night shift at the base and clearly wasn't reading right lol. All I thought was, dammit how are people not getting this yet lol. :tiphat:

Originally Posted by DarkJak (Post 2789159)

Is the parking brake still working well with these?

Regardless, I'll eventually buy them this year to match the fronts.

Originally Posted by PharmDZ (Post 2791310)

Dumb question... Correct me if I'm wrong but the rears are gonna sell for $650?? Aren't they smaller than the fronts? Dunno why they'd be more expensive.

Originally Posted by Dustin@Z1 (Post 2792003)

The rears are going to be slightly more expensive than the Rear's due to the additional cost in the aluminum hat. The hat is machined from a massive chunk of billet aluminum, that is expensive from a material standpoint. The iron section are also not a standard dimension, this also significantly increased the manufacturing cost having to have the irons custom made.

Just to confirm. These will be listed for $728 regular price. But we will list these on special for an initial offering at $648 plus shipping. Again, to also confirm, this is for the PAIR of rear rotors. We have a limited number of sets available at this time.

Originally Posted by edconline (Post 2792058)

Amazing price Dustin :tup:
But even more importantly, which way do they spin?! :stirthepot:

Originally Posted by Dustin@Z1 (Post 2792089)

The internal vane direction dictates the direction of rotation...which is what I think someone mentioned previously.

If you plan on installing brake ducts that are mounted close to the hub, you want the vanes to slant towards the rear of the car. Inside (hub edge) leading. This will allow the vane to "scoop" the air and spin it out through the middle of the disc. \\\\

If you do not plan on installing any brake ducting, then it really does not matter. However, a 19" or larger wheel will have additional clearance between the wheel's barrel and the rotor itself. These will allow air to be scooped and pulled into cool the hub/wheel bearing....in theory. ////

The vanes are designed to scoop air and force it through the rotor. The rotor will perform this action, regardless of which direction you choose. However, if you do install brake ducts in conjunction with the rotors and install the rotors in the wrong orientation, the ducting will be work to its full potential.

I hope I have answered your question.