View Garage- 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
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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.imageshack.us/img229/7537/reabrake6xm3.jpg
http://img229.imageshack.us/img229/8603/reabrake4sg1.jpg
http://img229.imageshack.us/img229/4736/reabrake1wf3.jpg
http://img229.imageshack.us/img229/5025/reabrake2co1.jpg
http://img229.imageshack.us/img229/3158/reabrake3jc9.jpg
http://img229.imageshack.us/img229/4475/reabrake5xu7.jpg
Edited by Draconis, 05 February 2011 - 02:41 PM.
