Z1 2-Piece Rear Rotors????

PharmDZ · 04-22-2014, 09:04 PM

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.

gomer_110 · 04-22-2014, 09:05 PM

Should have my set tomorrow. Can't wait to get them on.

edconline · 04-22-2014, 09:44 PM

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 rear rotors were more expensive when RB debuted them too, I'd imagine they cost more to produce and develop seeing as they have to retain the ebrake.

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slam1918 · 04-22-2014, 09:47 PM

Z1 2 piece rotor set front & rear installed with new pads,SS lines & Moto fluid

There seemed to be some question as to the weight of the rear rotors. My bathroom scale shows a 5 lb reduction from factory to Z1.

Tip on the install. you will probably have to back off the star wheels adjuster on the emergency brake. Check the tension on the brake assembly before re mounting the tires. On the rear I used the old caliper pins as the ones Z1 sent in the kit were too long and looked silly stickin out of the caliper.

She will be getting a wheel alignment tomorrow & then brake break in.

edconline · 04-22-2014, 09:52 PM

Oh boy, please tell me these are available without the cross drilling!

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DEpointfive0 · 04-22-2014, 09:56 PM

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.

Quote:

Originally Posted by edconline

The rear rotors were more expensive when RB debuted them too, I'd imagine they cost more to produce and develop seeing as they have to retain the ebrake.

Sent from my iPhone using Tapatalk

It's R&D costs as well as how much of a BITCH it is to make...

DEpointfive0 · 04-22-2014, 09:58 PM

Quote:

Originally Posted by edconline

Oh boy, please tell me these are available without the cross drilling!

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Yep, slotted FTW. Ordered mine already

6MT-Z34 · 04-22-2014, 10:07 PM

Quote:

Originally Posted by slam1918

Z1 2 piece rotor set front & rear installed with new pads,SS lines & Moto fluid

There seemed to be some question as to the weight of the rear rotors. My bathroom scale shows a 5 lb reduction from factory to Z1.

Tip on the install. you will probably have to back off the star wheels adjuster on the emergency brake. Check the tension on the brake assembly before re mounting the tires. On the rear I used the old caliper pins as the ones Z1 sent in the kit were too long and looked silly stickin out of the caliper.

She will be getting a wheel alignment tomorrow & then brake break in.

Nice! I think the rotors are directional I'm not 100% sure but u might want to check it before doing the alignment and brake in...?

DEpointfive0 · 04-22-2014, 10:10 PM

Quote:

Originally Posted by 6MT-Z34

Nice! I think the rotors are directional I'm not 100% sure but u might want to check it before doing the alignment and brake in...?

They are.

And slam1918 installed them wrong if I'm not mistaken

slam1918 · 04-22-2014, 10:11 PM

what's the beef with X drill??? I have an 04 Joe Gibbs Silverado with 175k miles Magnuson blower & Baer slotted X drilled rotors all around. I drove the crap out of it in the S. Florida heat & not a peep out of em. Changed pads @ 75k & didn't have to resurface the rotors.

Chuck33079 · 04-22-2014, 10:12 PM

They are much more prone to cracking than blank or slotted, especially with track use.

DEpointfive0 · 04-22-2014, 10:15 PM

Quote:

Originally Posted by slam1918

what's the beef with X drill??? I have an 04 Joe Gibbs Silverado with 175k miles Magnuson blower & Baer slotted X drilled rotors all around. I drove the crap out of it in the S. Florida heat & not a peep out of em. Changed pads @ 75k & didn't have to resurface the rotors.

Drilled rotors are infinitely more prone to cracking. You probably won't crack them with any amount of aggressive street driving in any temp, but tracking would probably do it.

I get upset that if stress cracks occur the manufacturer is blamed... Which is BS...

edconline · 04-22-2014, 10:25 PM

Quote:

Originally Posted by DEpointfive0

They are.

And slam1918 installed them wrong if I'm not mistaken

I believe them to be backwards as well. Based on their pictures on the site. The cooling vanes need to be angled towards the rear in order to evacuate heat from the rotor. If they were straight vaned I don't think it would matter which direction the slots ran, but they appear to be curved from the pics.

slam1918 · 04-23-2014, 05:07 AM

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.

edconline · 04-23-2014, 07:36 AM

They may have said that however unless their rotor design defies conventional wisdom/practices re: curved vane rotors, I think it was bad information.

Installation:
MOTOR Magazine Article | MOTOR Information Systems
https://www.drt-sport.com/faq
How to properly install plain, slotted, or drilled brake rotors

Good discussion on it here:
Direction of rotation - RacingBrake Forums

04-22-2014, 09:05 PM	#47 (permalink)
gomer_110 A True Z Fanatic Join Date: Aug 2011 Location: Perrysburg, OH Posts: 17,992 Drives: '11 Nismo #528 GM Rep Power: 36940	Should have my set tomorrow. Can't wait to get them on. __________________ '11 370Z Nismo #528 Fast Intentions \| Stillen \| Motordyne \| Uprev \| CSF \| Zspeed \| Z1 Motorsports \| AST \| Swift \| SPC \| SPL \| Whiteline \| Hotchkis \| Bride \| Schroth \| Robispec \| Cusco \| Nismo \| Volk \| Forgestar \| Hoosier \| RJM '17 Titan Bone Stock

04-22-2014, 09:52 PM	#50 (permalink)
edconline Track Member Join Date: Mar 2010 Location: Edmonton Posts: 855 Drives: 10' MB Z34 6MT T/S/N Rep Power: 22	Oh boy, please tell me these are available without the cross drilling! Sent from my iPhone using Tapatalk __________________ View Journal Audio Build

04-22-2014, 10:12 PM	#56 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29538	They are much more prone to cracking than blank or slotted, especially with track use. edconline likes this. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

04-23-2014, 07:36 AM	#60 (permalink)
edconline Track Member Join Date: Mar 2010 Location: Edmonton Posts: 855 Drives: 10' MB Z34 6MT T/S/N Rep Power: 22	They may have said that however unless their rotor design defies conventional wisdom/practices re: curved vane rotors, I think it was bad information. Installation: MOTOR Magazine Article \| MOTOR Information Systems https://www.drt-sport.com/faq How to properly install plain, slotted, or drilled brake rotors Good discussion on it here: Direction of rotation - RacingBrake Forums __________________ View Journal Audio Build

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04-22-2014, 09:04 PM	#46 (permalink)
PharmDZ Track Member Join Date: Jul 2012 Location: New Jersey Posts: 997 Drives: 11 Nissan 370Z BS M6 Rep Power: 13	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.

04-23-2014, 05:07 AM	#59 (permalink)
slam1918 Base Member Join Date: Feb 2012 Location: Tequesta, Fl Posts: 60 Drives: 10 370Z White A/T Rep Power: 13	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.