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I've ended up with a 300ZX front caliper and rotor setup. I've chosen EBC USR slotted rotors and red stuff pads. Now I need to make the caliper spacers and hub centric rings, but I can't for the life of me find the dimensions on the internet anymore! I've been searching for two hours! This is for a Cressida, so the spacer and ring dimensions may have been lost with TC.net. This is very frustrating. :32:

Could one of you with the proper knowledge be so kind as to tell me the necessary dimensions for the spacers and rings? I just need enough to make a CAD file or sketch for a machinist. Obviously, redrilling the rotors is not an issue.

EDIT: For the rings, I only need I.D. and O.D. For the spacers, I need the thickness and the distance between the bolt holes (e.g., center-to-center).

This thread is amazing! Thanks guys!

Mike
 

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Discussion Starter #462
All you need to do is measure the hub spigot OD and the disc ID.

You should switch to using an MPV disc. No caliper spacer required.

Off the top of my head I know the wheel bore that mounts on your hub spigot is 60.1mm and if I'm not mistaken the center hole diameter is 72.05 mm for the MPV disc. I would double check these numbers.

If using a Z32 disc you will require a 10 mm thick spacer for the caliper to move it out further to fit over the disc. This will give you less clearance for the wheels spokes.
 

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I have Q45/MPV (older version) parts on the way and there seem to be two 240sx brake line options - one for one for the Nissan Z caliper swap (on a 240sx), and the regular 240SX SS OE replacement. Which would be better for me?
 

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FRONT BBK IS NOW COMPLETE

There is minimum maching required to the hub and no brackets need to be fabricated to mount the caliper to the strut. A great improvement over the stock MA6x brakes, parts are readily availavle anywhere and the maching can be done quickly at a really low price.

If ideal front wheel size is 17x8 +10 offset, this setup will require 17x8 +20 offset. There should be a lot of wheels available in 4x114.3 in this spec.

Parts required as on pics below are.
MA6x hub. Outer edge machined down to ~143mm.
MPV disc. '93 4WD. Redrilled to 4x114.3.
Z32 Caliper/pads. 26 or 30mm caliper.







I have not redrilled the 4x114.3 pattern in the disc yet, but easy to do on any drill press.
Kind of going through this whole thread. Thinking of doing this swap and i read that this can be done with 15" wheels. Has anyone confirmed with this exact set up how it looks in the picture if it will work? have 15x8.5 watanabe wheels and i feel they will clear the spokes just wondering for now if the 15 will fit overtop this setup.
Evan
 

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cheers for all the research guys! very helpful! just spent hours reading the thread

i plan on starting mine tomorrow,

Z32 (r32 Gts-t) caliper
not to sure about the rotors though , should i go with the standard 32 rotor the mazda MPV or the Ford BA (im in aus) so i can easily get it.

and what should i do with the brake lines ? will standard ones work or will i have to go s13(180x240sx)

thanks again guys!
 

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Discussion Starter #469
280mm Nissan disc/caliper go with the 278mm MPV disc listed.
320mm Nissan disc/caliper go with the Ford Falcon disc listed.

The standard brake lines fit, upgrade to braided stainless.
 

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What are the dimensions of this disk that's 280mm.
280mmx40mmx60mm 20mm vented with 4x100 if anyone knows where to buy this plz share your valued information
 

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So years later here, I'm finally getting close to doing a big brake upgrade on my 86. I have been autoxing on stock cadmium plated rotors and pbr deluxe pads with stainless lines for a good decade and only in the last year have I felt like I could use some more brake torque and better fine control. Plus I want to start doing track days again.

My plan is z32 calipers paired with the Chrysler PT Cruiser rotor bolted to our hub, a setup I haven't seen discussed here in years. Why is that? What were the downsides of that combo, besides being a smaller rotor and as I recall requiring a caliper spacer? I really prefer to stick to the design our hubs were meant for and I don't like the idea of carrying around the extra weight an over hub setup introduces. I plan to stick with 15 inch wheels too, but they have awesome clearance (they clear the jk kit). Also which z32 calipers did they work with? As I recall, the rotors were different thicknesses na vs turbo but same pads.
 

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Found some info back on 23 about the pt cruiser method, not sure if anyone actually went through with it. Looks like you need a z31 turbo hub and then whatever caliper spacers to line it all up. I know lots of guys are ok with the mpv rotors on the outside method, including revvhappy lemons racing with em so if he can't break em or have issues i don't see why not go for the mpv setup, much faster to swap out too.
http://www.celicasupra.com/forums/showthread.php?3727-Brake-conversion&p=613774&viewfull=1#post613774

z32 calipers are better for pad selection and are 4 piston so you may need a new master to make up for that(NA has more clearance, but only the 90's are aluminum the rest are iron, all turbos are aluminum), q45's has more wheel clearance if the z32's don't fit for you but less pad selection and are 2 piston so should be fine with stock master.
http://www.celicasupra.com/forums/showthread.php?50872-Z32-4-piston-calipers

master cylinder info:
http://www.celicasupra.com/forums/showthread.php?52289-300zx-Front-BBK-what-master-cylinder-to-use/page2

90 NA z32 calipers are for 26mm rotors, all other z32 are 30mm. q45 is 28mm
http://www.ka24development.com/brake_upgrades.html
 

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I'm not sure that the Z32/MPV setup will clear 15" wheels since I've never had 15s. Running the rotors over hubs will also increase your front track width due to the thickness of the rotor hat between hub and wheel (approx 10mm on each side).

The hardest part of upgrading to the Z32 calipers is finding a machine shop to turn the hubs down, and drilling the 4-lug holes in the MPV rotors. After that you will have a front brake set-up that is reliable, easy to install and change pads, and strong enough to overpower most tires (I can lock 255s with medium-hard pedal effort). I'd recommend the alloy calipers that accommodate 30mm rotors (mine are remans from Autozone), and a set of 240sx braided steel lines. I run cheap rotors because I replace them every race (actually, the last race we put 22 hours on a set of cheap rotors with so little wear that one minimal pass of resurfacing made them brand new again).





 

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So are you running the NA calipers then? Those are 26mm, the turbo 30mm, but the MPV rotors are 28. Dude a couple pages back ran out of pad with his mismatched rotor and caliper thicknesses and almost wrecked, have people successfully run either caliper?

Regardless, my issue with over rotors is the same as Billy Ms from years ago (I've almost read the whole thread now lol). I'm not willing to add the weight of the center section of an over rotor unless I'm going to simultaneously switch to a new hub that is designed to work with over rotors and is significantly lighter then ours.

Honestly, calipers are easy. I don't mind making brackets, the issue is a I want a decent sized (read significantly, but not exorbitantly, larger then stock rotor rotor) that bolts up to our hub. I do prefer easy to change rotors, but not at a significant weight expense. I've been running the same set of rotors and (ceramic) pads for 10 years on my car, frequent rotor changes are not a concern. I would just bite the bullet and go JK as I know they clear my wheels (yup 15s even), but A) I would have to switch to T3 steering arms then (I have celica gts), and B) I don't like the idea of running rotors and pads that I can't just get through any old parts store. Plus I only need upgraded front brakes. JKs are such a big step up I would end up doing the rears too then.

So, I could have sworn that at some point in time on this board I saw someone with a front BBK setup with bolt on rotors. I thought they were the PT cruiser ones, but now I'm not sure. Has anyone ever successfully bolted those on? I'll have to look up the specs on those next. Or has anyone else ever found another bolt on rotor? Obviously redrilling the mounting holes on the rotor would be expected. And don't say cressida, not big enough.
 

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I understand better now, and for your requirements the OE rotor placement would be fine. I have the Z32 turbo calipers and 30mm rotors and they certainly add a few pounds to each side. The added mass does help in heat dissipation for track days, but larger rotors in the OE placement should be fine for 20-30 minute track stints if they have time to cool down between sessions.

Do you think a different pad selection might suit your needs?
 

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Ah i didn't catch your 15" requirement, i've seen it mentioned that if you run the mpv rotors with the 2 piston q45 calipers it will fit the 15" L type wheels. Have you thought about running the cressida hub/rotors and a custom mounted caliper? The rotors are 20mm larger and the stock setup fits under 14's(and will fit with no mods once you get the cressida hub on), but the calipers have the same size piston as ours and won't have much pad selection. I bet you could squeeze some bigger calipers onto the cressida rotor/hub setup and have a great increase that fits inside your 15" wheels.
http://www.tscperformance.com/supra_bigbrake.htm
 

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Guys don't sweat my 15 inch wheels. Like I said they clear JK brakes, which are bigger then the MPV rotors.

I should also mention, not only am I a weight weenie, I am a mono block snob too. There are several monblock 4 piston calipers that meet my criteria, but I will probably go with one of the z32 ones just for the awesome pad selection they have and the fact that the caliper bolt spacing happens to be the same.

Gamble, I assume you are talking about the later mx73 rotors. As I said, not enough of an increase to interest me (plus long term availability will become an issue). Mx8x Cressidas probably have big enough rotors but as I recall they went to over hub rotors on those? I'll have to check that again.

Revvhappy, stock pad selection is fine, I love my pads! In fact I've been out stopping big brake equipped cars with my setup for a long time. But in recent years as I've made more power and gotten faster, my brake setup has started to show its shortcomings. And I definitely need more rotor mass if I want to get serious about track days. Your rotors are 28mm wide aren't they?
 

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So the mx83 front rotors did go over hub, its the 88 mx73 rotor that was coming up in my searches. Its specs...


The 85 Supra rotor for comparison (basically same as mk2)...



So a decent upgrade for the cressida over the earlier rotor, but but pretty poor for the mk2.
 
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