Master Cylinder compatability

[sykikchimp]

If I want to upgrade to the 15/16's 240sx MC, and I currently have a 92' w/o ABS..

Which years/models were 15/16's and will work with my non ABS 240?

I have a feeling that any will work, but I want to be sure before I buy it.

thanks!~
Charles

[old_s13]

if you have f & r Z brakes, go with the Z32 1 1/16 MC.

[AKADriver]

The Z31 turbo and S12 SE-V6 both have 15/16" MCs that bolt in, but I'd try to find someone with either a Z31 or S12 FSM to verify the proportioning valve works the same way before pulling the trigger.

Any S13 240SX w/ABS MC will work if the extra port is opened up (same mods required to mount a Z32 MC). This one does have the 'right' proportioning.

S14 240SXs have a different port configuration that requires a little bending.

JDM master cylinders won't work at all, they're mirror-imaged.

[sykikchimp]

perfect.. exactly what I was looking for. Thanks man.

Mike - I'm going to be running S14 rear calipers which coincidentally use the same diameter piston's as the z32's. In an effort to keep as much rear bias as possible, I'm going to try a 240sx MC b/c they have a lower knee point in the bias valve.

I'm thinking this is the same setup the the K's silvia ran in Japan??

[sykikchimp]

Ok, so I look on Advancedautoparts.com and this is the picture of the ABS MC:

http://www.partsamerica.com/product_images/AAP/BEN/12474.jpg

Doesn't look like a removable plug? Are you sure this wil work??

[allmotorKA]

...In an effort to keep as much rear bias as possible, I'm going to try a 240sx MC b/c they have a lower knee point in the bias valve...

What knee point are you talking about and how does that indicate rear bias?

[cdlong]

you want a higher split point (knee point) for more rear bias. the split point is the point where it starts reducing the pressure to the rear calipers. check the FSM, i would check for you since i have it on my computer, but it isn't working right now.

from what i remember, your best bet is an early z32 non ABS MC. the split point is fairly high and it's 1", pretty close to the 15/16" you're looking for. as the model years went on the z32 split point went lower. i went to the local dealership and looked through their FSMs for the info. it's on the last page of the braking section.

[AKADriver]

I think the split point is 569psi for 240SX and Silvia MCs. It's in the 400's for the Z32 MC.

And, yeah, the S14 K's, S14 200SX (europe), and S15 Spec-R had 30mm iron Z brakes up front (basically, same caliper/rotor spec) and the same rear calipers and rotors as the S14 240SX. The master cylinder was 15/16" (1" with ABS) and it had the same split point as the 240SX.

Anyone know the Z31 turbo master cylinder specs? anyone? anyone? Bueller?

[sykikchimp]

yeah.. I meant it's higher.. not lower.. doh


any idea about the plug?????

[AKADriver]

Huh... it looks like they cast the spot for the extra port, but it's not drilled out. I guess that won't work, then. :( Sorry for the bad info!

[cdlong]

IAnd, yeah, the S14 K's, S14 200SX (europe), and S15 Spec-R had 30mm iron Z brakes up front (basically, same caliper/rotor spec) and the same rear calipers and rotors as the S14 240SX. The master cylinder was 15/16" (1" with ABS) and it had the same split point as the 240SX.

that's right, i forgot there was a LHD version, that's probably your best bet. that would be a better bet than the USDM MC because the split point is 3.92 KPa vs. 2.94 for the USDM. i don't remember the conversion from KPa to psi

[AKADriver]

I don't think the split point is higher than the 240SX piece. It is higher than the Z32 though.

3.92 kPa = 569 psi. I know this is the correct split point for the stock S13 240SX or for the S14 Silvia K's/200SX turbo.
2.94 kPa = 498 psi. This is the Z32 split point.



edit - updated the z32 split point psi :)

[cdlong]

i got the number for the USDM s14 from the FSM. i don't remember what year though. i'll check when i get my computer working again.

[AKADriver]

yeah, the S14 240SX/Silvia Q's might use the lower Z32 split point because it uses the bigger rear calipers with the same front calipers as the S13.

so it looks like the Z31 or S12 is the best hope for a 15/16 with the right split point.

the euro-spec S13 200SX is a 15/16 with the right split point, and they come LHD... but I have no idea where to start, getting LHD euro 200SX parts.

[sykikchimp]

OK.. update..

I've discovered that the 86+ Z31's had 15/16's MC, and had two different split points.

the NON-turbo had the 569 psi, and the Turbo had te 498 psi..

Now, I've called a couple places (including the dealer) to find the part, and everyone sells only 1 part for both cars.. BAHH! and no one knows which part they are selling.. DOUBLE [email protected]

SO, in an effort to figure out "WTF".. I've contacted Nissan Consumer Affairs NA and posted the question to them with the part # to figure out which MC is the one being sold.

Hopefully they will come through, and hopefully everyone is selling the NA version with the 569 split point.

I will update.

[cdlong]

how about a junkyard, i know of a junkyard that has an '85 NA that i could pull if you want.

[sykikchimp]

I'm thinking a junk yard is where I will end up.

I was at the parts store yesterday, and picked up a z31 MC from them for $28! So I'm hoping to find out it has the right split point before having to return it, and get something used from a junk yard.

[NismoSilvia270R]

didnt read well enough...

[sykikchimp]

Anyone with an S13 and ABS please look at your MC, and post up whether the 3rd hole is Cast over like in the picture?!?

post your year, and what it looks like.

thanks!

[Soulja]

Get an MC from an 1986 s12 200sx. 15/16, bolts right in, no modification required. Cost like 30 at advance auto parts, just had to swap my old resevior onto the new one, pops right off with a screwdriver. I used this when I went to Z32 brakes. Works beautifully, nice firm pedal, no problems with rear brake lockup.

[allmotorKA]

...I've discovered that the 86+ Z31's had 15/16's MC, and had two different split points.

the NON-turbo had the 569 psi, and the Turbo had te 498 psi..

Now, I've called a couple places (including the dealer) to find the part, and everyone sells only 1 part for both cars.. BAHH! and no one knows which part they are selling.. DOUBLE [email protected]

I called my local Nissan Dealer and this is what they told me:

'86 Z31 Non-turbo MC part number is: 46010-04P00
'86 Z31 Turbo MC part number is: 46010-18F20
'86 200SX MC part number: 46010-18F20

So according to my local Nissan Dealer, there is a different part number for '86 Z31 Non-turbo vs Turbo MC.

[West]

Here is a pic of my MC off my 91 ABS model.

What brake setup are you planning Charles, thinking about Stoptech front and Z32 rear?

[sr_sil80]

Does anyone know if this 15/16" MC will work on an 89 240 non-abs w/ (all 4)Skyline R32 GTS-T brakes. They are the same brakes as the 30mm. Z brakes. The MC is from a R32 Skyline as well, but i don't know if it will work well because it's from a RHD car. Also, should I try to find a 17/16" or 1" instead???

[sr_sil80]

just thought i'd bump this to the top, cause i still have no idea in regards to my post one above this one.
any input will help.

[kcolyer27]

So let me get this straight. If you have front z brakes and rear z brakes you need a new master cylinder.. Yes i knew that the question is does the z31 master cylinder work just as well as the z32? I need to find out so i can install my other 2 300zx brakes

[SilviaDriver]

Get an MC from an 1986 s12 200sx. 15/16, bolts right in, no modification required. Cost like 30 at advance auto parts, just had to swap my old resevior onto the new one, pops right off with a screwdriver. I used this when I went to Z32 brakes. Works beautifully, nice firm pedal, no problems with rear brake lockup.

sorry to bring something back from the dead but i had a questoin regarding this

does the 1986 200sx 15/16 MC bolt up to a non-ABS equipped S14? or is my only option the auto s14 mc?

[NismoSilvia270R]

I'm thinking a junk yard is where I will end up.

I was at the parts store yesterday, and picked up a z31 MC from them for $28! So I'm hoping to find out it has the right split point before having to return it, and get something used from a junk yard.


was that turbo or non? did it bolt in?
ive got a 17/16" MC but i think its overkill for maxima calipers up front and s14 rear...

[SilviaDriver]

turbo

adfdsfasdfsdf

[sykikchimp]

was that turbo or non? did it bolt in?
ive got a 17/16" MC but i think its overkill for maxima calipers up front and s14 rear...


yup.. bolts right in. I think it's the same part as the 200sx m/c.

[SilviaDriver]

i got a 1986 200sx MC 15/16" but unsure if it bolts up to a non-abs s14, still waiting for it in the mail. if it doesnt fit, its up for sale

[Modern]

i have a 1/1/16 but im not going to use it. if you want to buy it. also to let you know all of nissans part numbers point to the tokico mc. if you dont want to push in a fitting you need the nabco and the largest they still make is a 1 inch from courtsey nissan.

[NismoSilvia270R]

sykik-so you got the larger piston diameter, but sacrificed the high knee-point..?

does the non-turbo z31 bolt up? i hope so cause theres alot of em in the jyards near me.
just dont wanna spend the money if i dont have to. you know how college is.

[sykikchimp]

Well, according to old FSM's they are the same MC just one has a higher knee point. according to the guy at advance auto there is only one part so I figured what the hell.. I'll try whatever ya got, and see if it works out. :-P

yes, they should both bolt-up on an s13.. no idea about an s14.

[019]

i got a 1986 200sx MC 15/16" but unsure if it bolts up to a non-abs s14, still waiting for it in the mail. if it doesnt fit, its up for sale

i'd like to know if that works. keeps us updated.

on another note, i was looking through the different fsm's and noticed that the s14's had 2 different split points. so there's 3 different split points for 240's?
s13 -- 3.923
s14 zenki --1.961
s14 kouki -- 2.942

anyone want to speculate as to why the s14 zenki has such a different split point? sounds like a lot more front bias to me

[SilviaDriver]

well i got the MC a couple days after the post. it fits but you have to bend the lines slightly, i dont want to bend the lines because i want mine to look OEM. im careless too so i might kink the lines hahaha

i purchased a s14 auto MC that is 15/16" so i shall get that by the end of the week.

so with that said, the 86 200sx MC is up for sale! 15pickup/20shipped

[sykikchimp]

i'd like to know if that works. keeps us updated.

on another note, i was looking through the different fsm's and noticed that the s14's had 2 different split points. so there's 3 different split points for 240's?
s13 -- 3.923
s14 zenki --1.961
s14 kouki -- 2.942

anyone want to speculate as to why the s14 zenki has such a different split point? sounds like a lot more front bias to me

the s14 has a larger rear diameter piston in the caliper, so there is less rear pressure required. Also, I think the car has a slightly different weight balance, and a different cg than the s13.

[SilviaDriver]

here are some pics. they are huge but only for the reason so you can see the words on the MC

http://img.photobucket.com/albums/v189/defiants14/DSC00293.jpg
http://img.photobucket.com/albums/v189/defiants14/DSC00292.jpg
http://img.photobucket.com/albums/v189/defiants14/DSC00291.jpg
http://img.photobucket.com/albums/v189/defiants14/DSC00290.jpg

1986 200sx brake MC

[boosteds13]

Someone was asking about an S13 ABS MC....here is mine from my '91 ABS equipped car...
15/16 and I plan on using it with Z brakes up front and stockers in rear.

http://www.escic.com/cr95gst/mybrakemc.jpg

[019]

the s14 has a larger rear diameter piston in the caliper, so there is less rear pressure required. Also, I think the car has a slightly different weight balance, and a different cg than the s13.

right. i understand that part. i was referring more to the s14 zenki vs. s14 kouki, but after posting, i found the answer to my question. zenki's had a 54 mm piston, whereas the kouki has a 57.2 mm piston. so less front bias needed. doh :duh: should've looked harder instead of making a useless post, haha

[SilviaDriver]

id deemed your post more useful than many other post that can be found on zilvia.net

anyways, got s14 auto MC already, 200sx MC for sale!

[Ian]

ok so i have a question


i have an S14 w/ Z32 front brakes and stock S14 rear brakes


which M/C should i use to make it feel liek stock agian? cuz i have alot of free play in my pedal (donno if it's related) and i lock up my rears VERY easy...not so good

[SilviaDriver]

my 200sx MC.

the JDM K's S14 has 30mm calipers up front, with stock rear s14 brakes. just like our cars but with a z32 upgrade. but the difference between the z32 upgrade on our cars and an actual s14 K's, is that our MC is 7/8" while the K's is 15/16"

so in order to get the stock feel of a K's [Nissan put it in the cars from the factory, so it must be good] you'll need a 15/16" MC.

and what do ya know, i have a 15/16" MC for sale. :D

[sykikchimp]

ok so i have a question


i have an S14 w/ Z32 front brakes and stock S14 rear brakes


which M/C should i use to make it feel liek stock agian? cuz i have alot of free play in my pedal (donno if it's related) and i lock up my rears VERY easy...not so good


are you running the same brake pads front and rear?

[timmybgood]

the only question i have is if the 1986 200sx 15/16th's MC is appropriate for a non-abs zenki. i plan on having z32 front, stock rear, and the only answer i couldn't find is abs vs non-abs

[SilviaDriver]

abs s14 is 15/16' i believe

[AenjukuCar]

OK i have a Z32 swap on it's way, i'm going with them on all 4 corners. They are going on my 95 240sx base model without ABS. Question:

1. Which MC will I need for that Upgrade to retain the stock feel? The 15/16" 86 200sx???

2. Should I just get the MC off this 300zx TT or get a new one or what??

All thats included is:
-4 Z32 tt Calipers
-4 Z32 tt Rotors
-4 Z32 tt 5 lug hubs
-lines

[SilviaDriver]

4 z32 tt 5 lug hubs wont work on our cars. only thing that works is a z32 NA 5lug hubs. if youd like to know why it doesnt work, search for it because its been asked plenty of times. people ask what hubs from 300zx works, poeple tell them its NA, then they reply, "how come the TT wont work" and thats when you'll find your answer.

Nissan had 3 different MCs for the 300zx. 15/16", 1", 17/16"

which of the 3 equals stock feel of 240sx brakes? cant say for sure. some say the 17/16" is way too much. 1" isnt as common, i havent seen one sold before, BUT it can be found. 15/16" can be found easly.

i bought the 15/16" because i want my brakes to feel stock as if it came from Nissan like they did in the K's car.

[AenjukuCar]

Yeah I want my pedal to feel stock too. I was reading over the swap info on www.importnut.net they just used the same MC from the same 300 that they pulled the brakes and stuff from.

[SilviaDriver]

well in any event, you need to relocate your 5lug hubs cuz those wont work

[AenjukuCar]

Dang that sux, I'll just tell the guy to foreget about the hubs, well anyhow, at least it will save me some cash for now, till I can find hubs.

Well Can I still use the rotors, pistons, calipers, lines and ebrake cable for front and rear?? and then just buy some new hubs for 300zx na from the dealer?

[SilviaDriver]

yes you can use everythign else except the hubs. you dnot want to buy new hubs from the dealer, rear hubs from the dealer are not pressed. so you'll have to buy the hub and the bearing, then have them pressed together.

[AenjukuCar]

Thanks for your help, i really apreciate it, this will save me some time and money.
Thanks,
Cody