Jump to content
SAU Community

R32 Brake Master Cylinder # Bm44 Or Bm50?

adoboy666
 Share

Recommended Posts

adoboy666 Community Regular

adoboy666

Posted
Posted (edited)

hey everyone

i need to know what number is stamped on the side of an r32 gtr master cylinder, can someone please pop out to their car and check. also if you could note if ur gtr is equipped with abs or not

from what ive read the bm44 is what is on gtst and is 15/16" bore size

and the bm50 is on the gtr and is 1" bore size

i would just like someone to comfirm as on ebay they have seen people selling 15/16" bm44 master cylinders as gtr items... when from what ive read its a gtst one lol i just dont wanna get ripped off

im asking this as i upgraded my r32 gts25 (non-abs) single pot brakes to r33 gtst brakes (which people have said are the same size as r32gtr as they use the same 296mm front rotor and 297mm rear rotor)and they seem to be a lot more bias to the front brakes as they lock the fronts up on hard braking

currently on the car is the bm44 15/16" master cylinder (non-abs) that was originally used with the standard single piston brakes

Edited by adoboy666
-Jimmy- Mentor

-Jimmy-

Posted
Posted (edited)

I'm not sure if this helps you much but I just upgraded my brakes from 1 pot all round to GTSt specs which are pretty much the same as GTR however the rotors are 2mm narrower. I'm using a BM44 and it feels fine but if you end up going the BM50 let us know how it turns out :D

BTW: how much would a BM50 set you back roughly?

Edited by -Jimmy-
djr81 Grand Master

djr81

Posted
Posted
hey everyone

i need to know what number is stamped on the side of an r32 gtr master cylinder, can someone please pop out to their car and check. also if you could note if ur gtr is equipped with abs or not

from what ive read the bm44 is what is on gtst and is 15/16" bore size

and the bm50 is on the gtr and is 1" bore size

i would just like someone to comfirm as on ebay they have seen people selling 15/16" bm44 master cylinders as gtr items... when from what ive read its a gtst one lol i just dont wanna get ripped off

im asking this as i upgraded my r32 gts25 (non-abs) single pot brakes to r33 gtst brakes (which people have said are the same size as r32gtr as they use the same 296mm front rotor and 297mm rear rotor)and they seem to be a lot more bias to the front brakes as they lock the fronts up on hard braking

currently on the car is the bm44 15/16" master cylinder (non-abs) that was originally used with the standard single piston brakes

A Sumitomo caliper equiped R32 GTR (Povvo pack) will have a 1 inch bore size on the master cylinder.

A Sumitomo equipped R32 GTR (N1) with no ABS with have a 15/16 inch master cylinder, ie smaller with no ABS.

A Brembo equipped R32 GT-R with ABS has a 17/16 inch master cylinder.

A Brembo equipped R32 GTR with no ABS has a 1 inch master cylinder.

There are two different brands of master cylinder which are seemingly randomly allocated.

I can't exactly remember the BM number on the things. I can check the one I have spare at home if you are stuggling.

adoboy666 Community Regular

adoboy666

Posted
  • Author
Posted (edited)

yeh mine brakes fine just seems a lot more front bias

thanks for the info on the master cylinder sizes

from reading more in depth have found i will need a 1" bore master cylinder from a r32 gtr...

but my problem is r32 gtr master cylinders only come in abs...

i could go the r32 gtr n1 brembo 1" master cylinder which has no abs,but it is meant for the brembo calipers

the difference between the gtr(abs) master and the gtr n1(non-abs) master cylinders from abs and non-abs is abs have 2 outlets,one for front and one for rear brakes. and the non-abs master cylinder has 3 outlets (2 for front 1 for rear)

Does anyone know if i can just use an r32 gtr abs master cylinder and T-peice the front outlet so i can hook up the 2 front lines fine??

Edited by adoboy666
djr81 Grand Master

djr81

Posted
Posted
yeh mine brakes fine just seems a lot more front bias

thanks for the info on the master cylinder sizes

from reading more in depth have found i will need a 1" bore master cylinder from a r32 gtr...

but my problem is r32 gtr master cylinders arnt non-abs or...

i could go the r32 gtr n1 brembo 1" master cylinder which has no abs,but it is meant for the brembo calipers

the difference between the gtr master cylinders from abs and non-abs is abs have 2 outlets,one for front and one for rear. and the non-abs master cylinder has 3 outlets (2 for front 1 for rear)

Does anyone know if i can just use an r32 gtr abs master cylinder and T-peice the front outlet so i can hook up the front lines fine??

Well that is all that happens when the lines get through the ABS.

  • 2 months later...
liampire Contributor

liampire

Posted
Posted (edited)

I recently had some braking issues and my master cylinder was faulty. I thought I had a full R32 GTST M-spec brake conversion on my S13 however it turned out I still had the BM33 brake master from a standard S13. I went to Master Cylinder Exchange Service Wynnum and took my friends BM50 ABS master and did an exchange for a reconditioned non ABS BM50. It cost $275 and these are superior to a genuine nissan replacement as they have the stainless steel sleeve inserted into the bore. The part is guaranteed for life and the seals for 12 months. They say that a reconditioned master will out live the life of the car. Here is some handy information.

BM50 Master (25.4mm diameter)

S15 Spec R

300zx Turbo (also uses BM57 - 26.9mm)

R32 GTST M-Spec

R32 GTR non Brembo

R33 GTST BM44 (23.8mm)

R32/33/34 Brembo model BM57

Source: http://nissans15.com/brakes.htm

Edited by liampire
  • 2 weeks later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • joshuaho96
      "Cheap" bolt on turbo on RB25DET NEO

      By joshuaho96 · Posted

      GCG is a good company, they're a major distributor for Garrett in Japan as well.
    • The Bogan
      NC MX5

      By The Bogan · Posted

      Nah, OEM washer bottle and brake fluid reservoirs are fine I don't know what it is with the plastic that Mazda used, some plastics, like the washer bottle and brake fluid res are fine, and still look new after 20 years use, where as the coolant expansion tank, and PS reservoir, that I replaced with new OEM items when I first got the car, turned yellow and started getting brittle a few years later If the dirty yellow stained plastics didn't trigger me there wouldn't be an issue, but they did, much like the battery bracket....... Meh As for going back to work full time to support car stuff, nope, why, because I own a Mazda NC MX5, not a Nissan R series Skyline 🤣
    • GTSBoy
      "Cheap" bolt on turbo on RB25DET NEO

      By GTSBoy · Posted

      I've never heard of CJ-motor, so can't advise you on them. I'd just go straight to GCG for a GCG highflow though. Seems no point to use a middleman. I'm somewhat surprised that the price on the CJ site is lower than the GCG retail price. Even though CJ would get a discount of some sort, you would hardly expect them to give up so much margin. Maybe the price is out of date? Having said that "I'd go to GCG"...when I did my highflow, I went to Hypergear. I did this https://hypergearturbos.com/product/rb25dethighflow/#tab-dyno-results with the R34 OP6 450HP profile. With the BB centre (extra $400) and intially with the standard boost actuator, but I eventually got him to send me the high pressure one when I got to the point of being able to actually use it. Ends up costing the same sort of money as the GCG highflow, but this is, of course, the turbo that I KNOW has a shorter length core and so moves the comp cover rearwards. The GCG apparently doesn't do that. My mechanic also swears by the GCG highflow, given that we have another turbo rebuilder who does something essentialy the same as theirs, using Garrett wheels. He says it stands up at really low revs and makes good power. I haven't pushed my HG highflow past ~240-250rwkW yet (should have a little more in it, but unclear how much) and it does have a fairly gentle boost ramp. OK, it's much better now that I have gotten my boost controller tuned up on it.  A lot of my earlier unhappiness was because I couldn't keep the wastegate flap as closed as it needed to be (including some mechanical issues). I'd still prefer it to boost up nearly as quickly as the stocker, and it certainly a bit slower than that. So maybe the GCG one is worth the first look (for you).
    • Kapr
      "Cheap" bolt on turbo on RB25DET NEO

      By Kapr · Posted

      Ok thanks 🙂 I will higly consider this. Any "known" company for a good reviews and experience to send that off? Is that CJ-motor good one? Or go straight to GCG site? I need to use VPN to even find some of those "shops" let alone access them 🙂 
    • GTSBoy
      Why am I hitting a power wall with my stroked RB25?

      By GTSBoy · Posted

      You can literally put in as much WMI as it takes to quench the combustion totally (and then back it off a little, obviously), and it will keep making more and more power. The power comes from the cooling effect of the water (and the meth) and the extra fuel (the meth, which also has massive octane). It is effectively exactly like running E85. One might be slightly better than the other, but they are damn close. But with either you can lean on the boost or the timing (or both) waaaay more than with just petrol and the results are similar. Here's the first thing I googled for an anecdotal bit of evidence. Can't access the attachment without being a gold member, but it is there for the getting if able to, or searched up elsewise perhaps. https://www.hpacademy.com/forum/general-tuning-discussion/show/wmi-vs-e85/
×
×
  • Create New...