Z1 2-Piece Rear Rotors????

FPenvy · 04-23-2014, 08:40 AM

Quote:

Originally Posted by slam1918

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.

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

Sh0velMan · 04-23-2014, 08:41 AM

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.

LostSol · 04-23-2014, 08:42 AM

Quote:

Originally Posted by Sh0velMan

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.

Hotrodz · 04-23-2014, 09:19 AM

Yup, I'm with slam1918...I initially installed mine with outer vanes running the other way as some have suggested and I was told that my rotors were backwards as compared to another Z with Z1 rotors. These were people that are very knowledgeable.....

edconline · 04-23-2014, 09:36 AM

Quote:

Originally Posted by Sh0velMan

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.

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.

Quote:

Originally Posted by FPenvy

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

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

Sh0velMan · 04-23-2014, 10:34 AM

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

Quote:

Originally Posted by edconline

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.

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

edconline · 04-23-2014, 10:38 AM

Quote:

Originally Posted by Sh0velMan

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

LOL. I just re-read your post and was like

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.

Sh0velMan · 04-23-2014, 10:42 AM

Quote:

Originally Posted by edconline

LOL. I just re-read your post and was like

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.

Dustin@Z1 · 04-23-2014, 11:04 AM

Quote:

Originally Posted by DarkJak

Is the parking brake still working well with these?

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

DarkJak,
Yes the Parking Brake is retained and fully functional with our 2-piece Rear Brake Rotors. We designed the internal parking brake drum to work with all OEM Parking Brakes without modification. We DO NOT recommend parking brake drifts or using the parking brake after doing a track session due to the aluminum hat. This is consistent with any of rear brake rotor on the market either Steel or Aluminum.

Dustin@Z1 · 04-23-2014, 11:09 AM

Quote:

Originally Posted by PharmDZ

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.

The rears are going to be slightly more expensive than the front rotors 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 is 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.

edconline · 04-23-2014, 11:41 AM

Quote:

Originally Posted by Dustin@Z1

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.

Amazing price Dustin

But even more importantly, which way do they spin?!

Shadezz · 04-23-2014, 11:51 AM

At least a full package deal please front & rears? Thanks!

Dustin@Z1 · 04-23-2014, 12:00 PM

Quote:

Originally Posted by edconline

Amazing price Dustin

But even more importantly, which way do they spin?!

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.

edconline · 04-23-2014, 12:07 PM

Quote:

Originally Posted by Dustin@Z1

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.

Yes. I have never seen this suggested before, I think that would be an interesting test with some equipment to measure temps in both orientations. I will probably stick with the industry convention on orientation regardless of ducting or not. Thanks for the reply.

Hotrodz · 04-23-2014, 12:23 PM

I'm wearing my brakes out changing my rotors and re-bedding them lol. I think I will leave them the way they are just to be different.

Sent from my SPH-L710 using Tapatalk

04-23-2014, 08:41 AM	#62 (permalink)
Sh0velMan A True Z Fanatic Join Date: Jan 2012 Location: Dallas/Ft.Worth Posts: 3,349 Drives: Noisily. Rep Power: 20	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. DEpointfive0, slam1918 and Hotrodz like this. __________________ Buy My Car! \| Build Thread

04-23-2014, 09:19 AM	#64 (permalink)
Hotrodz A True Z Fanatic Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684385	Yup, I'm with slam1918...I initially installed mine with outer vanes running the other way as some have suggested and I was told that my rotors were backwards as compared to another Z with Z1 rotors. These were people that are very knowledgeable..... __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

04-23-2014, 11:51 AM	#72 (permalink)
Shadezz Track Member Join Date: May 2012 Location: Colorado Age: 43 Posts: 896 Drives: 2012 Nissan 370Z Rep Power: 14	At least a full package deal please front & rears? Thanks! __________________ 2012 370Z BLACK EDITION/ FLT BLK Rays / 5% 3M Tint / DW's / Z1 SS & 2 Piece Rotors Nismo S-Tune OEM / Beluga CBE & Y-PIPE / DDX370 / GTR Start .4 Fluid / NST Blue Kit

04-23-2014, 12:23 PM	#75 (permalink)
Hotrodz A True Z Fanatic Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684385	I'm wearing my brakes out changing my rotors and re-bedding them lol. I think I will leave them the way they are just to be different. Sent from my SPH-L710 using Tapatalk __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

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