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Z06/ZR1/ZL1 rear brakes

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Old 12-09-2021 | 10:02 AM
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B4CYA's Avatar
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From: Indiana
Car: 85 Z28/87 IROC-Z/92 B4C
Engine: Twin turbo LS9/SC LS9/L98
Transmission: RPM T56/T56 Magnum/700R4
Axle/Gears: 9"/Dana 44/10 bolt
Z06/ZR1/ZL1 rear brakes

I have searched and cannot find any details on installing larger rear brakes. Every front brake in the world has been adapted. But it seems that PBR rear brakes are the only thing people run. Has anyone successfully installed larger rear brakes? Does anyone make mounting brackets?

Thanks in advance.
Old 12-09-2021 | 12:57 PM
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Re: Z06/ZR1/ZL1 rear brakes

Yes, you can fit a variety of rear brakes but it is spendy and you often loose use of the parking brake. You can view choices at website for www.bigbrakeupgrade.com
Old 12-09-2021 | 12:58 PM
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Re: Z06/ZR1/ZL1 rear brakes

The reason you don't see it often is because you really cannot have a fixed caliper on a floating axle (10 bolt). There are kits and brackets out there but you can suffer from pad knock and horrible breaking. Aesthetics aside, a properly setup 4th gen rear brake system is more than enough.

I believe Flynbye sells a C5/C6 floating rear caliper set under C56CONVPLZO6 . Kore3 also sells brackets for fixed caliper set-ups but most are for non 10 bolt rears (9 inch etc).
Old 12-09-2021 | 02:16 PM
  #4  
B4CYA's Avatar
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From: Indiana
Car: 85 Z28/87 IROC-Z/92 B4C
Engine: Twin turbo LS9/SC LS9/L98
Transmission: RPM T56/T56 Magnum/700R4
Axle/Gears: 9"/Dana 44/10 bolt
Re: Z06/ZR1/ZL1 rear brakes

Originally Posted by QwkTrip
Yes, you can fit a variety of rear brakes but it is spendy and you often loose use of the parking brake. You can view choices at website for www.bigbrakeupgrade.com
Im not too worried about losing the parking brake. I literally have ZR1, C6 Z06, ZL1 and a complete Brembo Gran Turismo brake kit sitting in my garage waiting for me to find a way to adapt them to my Dana 44 rear end.

Originally Posted by ShiftyCapone
The reason you don't see it often is because you really cannot have a fixed caliper on a floating axle (10 bolt). There are kits and brackets out there but you can suffer from pad knock and horrible breaking. Aesthetics aside, a properly setup 4th gen rear brake system is more than enough.

I believe Flynbye sells a C5/C6 floating rear caliper set under C56CONVPLZO6 . Kore3 also sells brackets for fixed caliper set-ups but most are for non 10 bolt rears (9 inch etc).
I have no doubt the stock PBR rears are sufficient. I have some really nice 4 piston rear setups and I would like to have modern matching calipers. They will be going on a Dana 44. So this shouldn't be a problem for me. I will check out Kore3. Thank you!

Last edited by B4CYA; 12-09-2021 at 03:29 PM.
Old 12-09-2021 | 02:57 PM
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Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Re: Z06/ZR1/ZL1 rear brakes

Does anyone offer a Two-Piece Rotor that would help with the Fixed Rear Calipers?
Old 12-09-2021 | 03:28 PM
  #6  
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From: Indiana
Car: 85 Z28/87 IROC-Z/92 B4C
Engine: Twin turbo LS9/SC LS9/L98
Transmission: RPM T56/T56 Magnum/700R4
Axle/Gears: 9"/Dana 44/10 bolt
Re: Z06/ZR1/ZL1 rear brakes

Originally Posted by vorteciroc
Does anyone offer a Two-Piece Rotor that would help with the Fixed Rear Calipers?
Wilwood makes just about any offset rotor hat you could want. Brembo has a pretty good selection as well. I'm not really concerned with the rotors as much as I was looking for an already sorted out caliper bracket. Kore3 sells complete kits which I'm not really looking for. So I will probably just make a caliper bracket that attaches to the stock PBR bracket.

Old 12-09-2021 | 04:36 PM
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Car: 1989-92 FORMULA350 305 92 Hawkclone
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Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Z06/ZR1/ZL1 rear brakes

My Dana 44 rear axles don't float like 10bolt axles do so you should be ok to mount a fixed caliper. Just find or make a bracket.
The following 2 users liked this post by TTOP350:
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Old 12-10-2021 | 12:28 PM
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Car: 1987 Formula (original owner)
Engine: 305 TPI
Transmission: T5
Axle/Gears: 9-bolt/3.45
Re: Z06/ZR1/ZL1 rear brakes

https://bigbrakeupgrade.com/product/...no-park-brake/
https://bigbrakeupgrade.com/product/...ake-provision/
https://bigbrakeupgrade.com/product/...-brake-9-bolt/

The links are for 9-bolt axles, but Scott modifies them to order, so he can probably make them fit any axle.

The backing plates with the parking brakes are actual C5/C6 assemblies.
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