R32 Master Cylinder Changeout

[full house]

yup! It would fit. Try it . . .

[Roy]

So has anybody found a 17/16 BMC that is 3 port for non ABS? I dont want to run a Patrol BMC as i read its larger and its already tight in there and different size will affect the Cusco stopper i run.

LOL, so, i am thinking i may just buy a BM57 rebuild kit and bore out the BM44 i run. Two kill birds with the same stone

[Birth]

I had a look at a BMC on a Patrol today. I want to confirm that the one that we are talking about with-out the proportioning valve has two outlets.

Also, I assume that the bias controller will simply be fitted in line between the BMC outlet and the line running back to the rears? Thanks, Ben.

[Sarumatix]

Bump for great justice. Can't find any listing of brake masters on greenline.jp.

I have a gts-4 with Rb26 and GT-R Sumitomos. I have ABS with no gt-r booster (aside from the unit that bolts in between master and pedal)....

ARGH..

So VIN isn't going to match up, I have no idea which size to get, and no idea where to get it from ^_^. Please help.

It currently has a 'BM50' unit from tokico on it which started leaking very badly today and is marooned at the mechanics workshop.

[NZM.031]

epic thread brought back from the dead..

[Sarumatix]

Given this is the third master I have had problems with.. i'm very surprised there isn't more information on new units. Especially when opinion seems split 50/50 as to the value of a rebuild.

[NismoSTune]

Gotta revive this one, sorry guys. I bought an R34 BMC (supposedly), ABS (2 ports) for my R32 gtr last year. Went to install it and fits great HOWEVER the level sensor wire connector is on the left side, not the right and is a different style connector. It's a 17/16 BMC with a black cap. Is this something that's easy to fix? Can't seem to find what kind of connector I need. According to the part number I could find, I think it's an R33 gtr BMC. Anyways, what should I do? I need fluid level protection.

[badhairdave]

extend the wires and mod the plug or regularly check your brake fluid level.

Did that really warrant necrophilia?

Edited March 31, 2011 by badhairdave

[nobby]

This is to the best of my understanding. The R32 Gt-R's with Sumitomo callipers had 1" BMCs according to the shop manual. Brembo equipped R32's had 17/16's BMCs. N1's with Sumitomos (Or Nismo versions if you like) has 15/16's with no ABS & Brembo equipped N1's had 1" BMC's. Cars without ABS have 3 outlet BMC's.

Brake master cylinders for R32 Gt-R's.

Part numbers are stamped on the end of the master cylinder. There appears to have been two different part numbers available for most build dates. This may be as simple as Nissan sourcing master cylinders from two different manufacturers - Tokico & Nabco.

Stock model:

Build dates from 8908 to 8911

Part number 46010-05U20

Size 1"

Build dates from 8911 to 9108

Part number 46010-05U00

Size 1"

Build dates from 9108 on

Part number 46010-05U20

Part number 46010-05U00

Size 1"

V-Spec model, ie with Brembo brakes.

Build dates from 9302 on

Part number 46010-05U02

Size 17/16's.

N1 versions.

This gets confusing & may well be incomplete.

Early version appear to have 15/16" master cylinder sizes. I would guess (Note: NOT SURE) that they may well have three outlets rather than the normal two for stock GT-R's & have Sumitomo callipers. The number of ports relates to the presence of ABS. 2 ports for ABS, 3 for Non ABS. n Interestingly they appear to be smaller in size than their equivalent ABS equipped stock or V-spec GT-R's.

Any way:

Build dates 9002 to 9108

Part number 46010-02U00

Build date 9108 on

Part number 46010-02U00

The specification is listed differently for these units but is in Japanese on the spec sheet & I can't read it.

The alternate parts listed are here

Build dates 9002 to 9108

Part number 46010-02U20

Build date 9108 on

Part number 46010-02U20

Later versions had a 1" size.

Build date 9203 on

Part number 46010-05U01 for a Tokico unit.

Part number 46010-05U21 for a Nabco unit.

There may well be more options but that is the limit of my knowledge at present.

Hi guys have a search for a page from nissan fast, NFA051, this covers 5/89 to 2/93 this may help out on the part number issue for the brake master it also shows alternate part number but unfortunatly not clear on abs presant or not.

Edited April 26, 2011 by nobby

[nobby]

They aren't anything special. Just Project Mu sized for a 33 R. The fronts only weigh 0.5 kg heavier for the pair than the rears. But you can't get any hatted back rotors for sensible money. Also the vanes on the rear are, for whatever reason, more substantial & numerous than for the fronts. No idea why that is but I stopped asking such questions after I got sick of the local stuff cracking.

Hi mate you will proberly find that the rear of the car has more trouble getting air to the brakes, under my 32 bleeding brakes recently and recon there's alot more in the way at the back to block the flow.

What air there is making it to the rear proberly has some degree of heat in it from up front, thats my guess.

A std 32gtr also has air ducts and/or possibly a deflector directing air up front to help.

Front are thicker and can soak up more heat.

"think of thick and thin saucepans, which more easly burns ya tucker and gets uneven heat distrabution" same could be said for rotors.

And then theres the added benifet of less unsprung weight at the back for the suspension to deal with.

and lets not forget the added weight to the drivetrain, a larger weight would decress accleration to some degree, and the list goes on

Edited April 27, 2011 by nobby