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Brake updgrade options


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12 replies to this topic

#1 Draconis

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Posted 09 July 2010 - 06:54 AM

Brake Upgrade Options
- Used with permission by Henry Nguyen and Hung Pham


Brake upgrade for 5-lug with STOCK S12 suspension
- S12 MK2 SE V6 struts/springs

- Z31 87-89 turbo front hubs(for slip on rotors) and wheel bearing
- Z31 87-89 turbo front rotors
- Z31 87-89 turbo front calipers
- Z31/S12/S13 lines, SS or rubber

Alternative brakes for the SE V6 WITH Z31 hubs for slip on rotors
- S13/s14/q45/j30/z32 front Calipers
- matching rotors
- Z31/S13/stock brake lines /// -S13-Z32 front conversion lines for Z32 calipers
- washer to space calipers out .170" to center the caliper to rotors


Brake info for S13/s14 front conversion(this applies AFTER you have converted)

If you use the Z32 4pots, you will need a Z32 master cylinder -and- Z32 front brake conversion lines for an S13. The z32 piston diameter is 1" or 1 1/16". If the stock S12 master cylinder size says 15/16" on it(most are), then the Q45/J30 brakes will work fine. As for brake lines, stock S13 lines will bolt up to q45/j30 calipers. You can get Z31 SS lines (ebay ones don't hold up too well) and they will bolt right up to the front and rears(make sure it is 6 pieces, 2 front 4 rears).

For the stock SE V6ers, they can run Z31 SS lines all around.

Brake option #1:
Z32 Front brakes
- Z32 Master cylinder 1" or 1 1/16"(15/16" is fine but will give a slightly mushier pedal feel)
- S13 Z32 front brake conversion line
- Z32 rotors(matching calipers)
- IF 4-LUG! --- Redrill rotors

Brake option #2:
S13/S14 calipers
- S13 master cylinder 15/16"(if stock is 15/16" not required)
- S12/S13/S14/Z31 front lines(stock rubber or SS)
- S13 rotors for 4lug /// -S14 SE rotors for 5 lug

Brake option #3:
Q45(90-96)/J30(93-97?, recheck before ordering) front calipers
- S13 master cylinder 15/16"(if stock is 15/16" not required)
- S12/S13/S14/Z31 front lines(stock or SS)
- Q45(90-96) /// J30(93-97) front Calipers
- Q45/j30 rotors
- IF 4-LUG! --- Redrill rotors

** Z31 Rear ** Conversion

+++Z31 vented REAR brake swap
- Z31 87-89(na/t) rear control arms
- Z31 87-89 axles(my stock 6-bolt s12[r180] axles bolt up to Z31 arms, R200 axles should too.)
- Z31 87-89 calipers/rotors
- Z31 SS/stock lines(2 front, 4 rear)
+++Try to get this as a set, it'll make your life EASIER!

Ok Some background info. Before everyone though that Z31 87-89 arms and S12/Z31 84-86 arms were identical except the hubs. WRONG. The actual Z31 87-89 arm is different. It has been confirmed by 200sxkit car that the rear arms are infact different. The mount for the hubs are pushed out 10mm to accommodate for the taller vented rotors. The rear hubs used among the 84-89 Z31s are probably all the same. So if you want vented brakes on the rears, BUT wish to retain 4 lug, get your rear 4-lug hubs and swap them over to the 87-89 Z31 rear arm. Then redrill your Z31 vented rotors to fit on your 4-lug hubs. DONE! Obviously, if you want 5 lug, just get the 87-89 Z31 arms, and bolt them on, no hub swapping needed.

If you find a way to get 87-89 Z31 vented rear rotors on stock S12/84-86 Z31 arms, please let me know. I have an idea, listed below...

Z31 vented brake info/tech:
!!USE AT YOUR OWN RISK!!
My theory to run the vented brake rotors/calipers on an S12/Z31(84-86) RCA is to get a hubcentric 10mm spacer(that fits inside the vented brake rotors and centers it) to space the rotor out 10MM and the vented brake calipers should bolt up to the S12/Z31 84-86 arm. If you're 4-lug, just redrill the vented rotors to 4-lug.
!!THIS IS NOT CONFIRMED, USE AT YOUR OWN RISK!! If you have tried this and it does work, please let me know and post me some pictures so I can make sure

----------------------------------------------------
Rear R32 Brake Conversion
Courtesy of Gerryb

87-89 Z31 trailing arms.(Could be done with normal s12 trailing arms with bigger spacers but starts to get complicated and messy)

Brake backing plates and hbrake shoes and bits from HR31 JDM Skyline or Y31 JDM Cima, (same as the M30 in the US).

handbrake cables from a HR31 JDM Skyline, (US would use M30)

5mm slip on spacers

HR31 or Cima flexible brake lines (US M30)

Z32 rear calipers

Z32 rotors

Z31 5 stud hubs, (not necessary you can stay 4 stud if you wish)

Steps:

1. Widen the diameter of central hole in the backing plate to clear the Z31/s12 bearing tube which is a few mm to wide, (I just used an angle grinder and die grinder)

2. 2 diagonal holes in the backing plate will line up with 2 on the Z31/s12 arms. Redrill these holes using a 9mm drill bit, then retap them to 10mm x 1,25mm thread

3. Bolt the plate on then mark the 2 other holes that don't line up and redrill holes in the trailing arms using 9mm drill bit and tap to 10 x 1.25mm, (I got an engineer with a pedestal drill to do this for me cost $30 for both trailing arms, I have since bought a pedestal drill so next time (not that there will be a next time!!) I can do it myself

4. Cut the outside portion of the backing plate off with a thin cutting blade in the angle grinder, (its to narrow for the Z32 rotors and you only need the centre bit the brake shoe mechanisms mount to.)

5. That's about it really, then everything bolts up.

I'll get pics when I get time.

I haven't bolted these arms up to my car yet, I'm waiting on my rear srping mounts from megan so i can bolt everything on together and be done all at the same time.

Oh almost forgot to mention with this brake setup the track is 15mm wider per side so you may need a guard roll with your tyres pushed out this much, depending on combination of wheel width, tyre size and rim offset.
More information yet to come.

I haven't swapped the stub axle in yet. Last photo shows where I've redrilled one of the new holes required.

http://img229c.image...eabrake6xm3.jpg
http://img229.images...eabrake4sg1.jpg
http://img229.images...eabrake1wf3.jpg
http://img229.images...eabrake2co1.jpg
http://img229.images...eabrake3jc9.jpg
http://img229.images...eabrake5xu7.jpg

Edited by Draconis, 05 February 2011 - 02:41 PM.


#2 Maxic.od.ua

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Posted 17 October 2010 - 05:52 AM

i bought brakes from gtr r33 in the front
and from s 14 on the back
SEX,DRIFT AND ROCK'N'ROLL

#3 jimmyjams

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Posted 17 October 2010 - 06:23 AM

The R33 GTR front brakes will work with DR30 front struts and Z31 LCA. But the S14 rear brakes will not work because they have a seperate handbrake/ebrake where as the S12 uses the same caliper for handbrake and foot brake.
85 S12 Gazelle IRS FJ20et94 180SX Strawberry face SR20DET 270.5kw

#4 gerryb

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Posted 17 October 2010 - 08:29 AM

S12,S13,S14,S15 all use the same size rotor and caliper. The same pads fit all these, only difference from change to s13 on is a difference in handbrake cable mount on the caliper.

All the following use a separate drum type handbrake inside the brake disc: HR31, Z32, R32, R33, R34 etc. As well the following have 2 pot rear calipers: Z32, R32T, R33T, R34.
This setup can be made to fit an IRS s12 with the following wierd combination of parts:
Z31 87-89 (only) rear suspension arms, HR31 brake backing plates mounted after redrilling two holes in the suspension arms and tapping them, HR31 handbrake cables (these bolt straight up to s12 IRS centre handbrake cable), choice of HR31, R32,33,34,Z32 rear brake backing plates and drumhandbrake. R32,33,34,Z32 discs, a 5mm spacer mounted behind the disc.

I've done it only because I had the parts lying around so thought I'd give it a try. Not really necessary as rear brakes don't contribute enough to stopping.
I hate fat people!!

#5 Umai Naa!!

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Posted 17 October 2010 - 10:12 AM

Good work guys!

Please keep this thread to KNOWN setups, not speculated or assumed setups. The more accurate our information database is, the better!

im usually naked anywayclothes are for rich ppl


Can do cash jobs!

I can even come to you!

#6 Draconis

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Posted 05 February 2011 - 02:48 PM

Updated with Z31 and Z32 brake mods.

#7 DeeTeez

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Posted 10 August 2011 - 12:32 PM

is the z32 rear brake upgrade only availiable for live axle? or will it work on IRS?

#8 gerryb

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Posted 10 August 2011 - 03:35 PM

Of course front suspension is the same for both cars
I hate fat people!!

#9 ASid

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Posted 23 June 2013 - 06:39 PM

Hey, I finished my HNR32/BNR32/Z32 2 pot rear brake conversion (without hand brake) on Nissan Silvia S12 '84 FJ20E (European market) 290mm rear brake discs. Maybe it will be interesting for someone.
Previous owner installed aluminum brakes from HNR32 (Nissan Skyline R32 4WD RB20DET, brake discs 280x30mm front, 297x18mm rear), the same as on Z32, and rear brakes the same as on GT-R 32 (BNR32). I have S13 suspension on front, so that's clear. At rear brakes was installed on original S12 brake disc 290x10mm (i think all was bolt-on), but that disc is too thick.

So I bought brake discs from Toyota RAV4, original code 43512-42010. Gave them to turner - reduce external diameter from 302mm to 290mm, and increase internal diameter from 62mm to 68.09mm. Drilled 3 holes on each disc for 4 lugs hubs.

Original Disc | Z32 disc | RAV 4 disc
tormozasravnenie.png

p1020203mod.jpg

p1020208mod.jpg

Also I bought original brake pads from Subaru Impreza WRX (same construction of calipers) - code 26696-FA000. I prefer them because it's break pads + all mounts + all plates in one pack!

So here we are:

8q13.jpg

zvxq.jpg

ch8j.jpg

All fits perfect :) Also I cut a bit baffle-plate.

a7bl.jpg

 



#10 TDM Racing

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Posted 25 June 2013 - 09:11 AM

Very nice mate! Good work.

Did it make a big difference? Did you have to change the brake bias at all?


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#11 ASid

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Posted 10 July 2013 - 01:09 AM

Very nice mate! Good work.

Did it make a big difference? Did you have to change the brake bias at all?

Thanks :)

I bought my car with this brakes, rear and front from Nissan Skyline HNR32, but rear discs was original from S12 and 10mm depth (HNR's are 18mm and don't fit to wheel hub), so I just replace original S12 disc (290mm diameter) with RAV 4 brake disc (18mm depth and 290mm diameter) and I didn't change brake bias (because rear and front brakes from one car)



#12 SilverFox

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Posted 23 July 2013 - 02:59 AM

I made the outer diameter 296 and it is too big. Everything else fits perfectly. Thanks ASid


Edited by SilverFox, 23 July 2013 - 03:07 AM.


#13 ASid

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Posted 29 July 2013 - 12:41 AM

I made the outer diameter 296 and it is too big. Everything else fits perfectly. Thanks ASid

Good to hear that my upgrade option was helpful :) I also made 296mm first time, then reduce it to 290mm.






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