Master Cyl Diameter

[John Dixon]

Anyone know the diameter of the stock master cylinder?

Thinking of trying to get a bigger one to improve the pedal with GTR callipars.

[lymon]

cylinder bore according to the service manual (BR-55): 26.99mm

 

-Eric

[John Dixon]

Thanks Eric,

Any idea where I might get a bigger one? Maybe a GTR is the obvious place to start looking!!

[lymon]

afaik the GTR has a 25.4 diameter...and skyline owners use our MBC as an upgrade :D

also the largest AP racing MBC is (just) 25.4.

 

You could however upgrade to a twin MBC system though ;)

[Guest andyduff]

Is it pedal travel you're trying to change john? If so you could look at a bit of fab work and shift the pivot point about a bit ;)

[TopLess]

Or you could wind the pedal out slightly, same as the clutch, but not too much

[Guest andyduff]

That will only affect the height of the pedal though....

[TopLess]

That will only affect the height of the pedal though....

 

 

No it also affects the travel, I know cos I adjusted mine by mistake, I thought it was the clutch when I was upside down :duffer:

[Guest andyduff]

Well it will bring the point where the brake pads hit the disc further up yeah but the actual travel from there will be the same ;)

[TopLess]

Well it will bring the point where the brake pads hit the disc further up yeah but the actual travel from there will be the same ;)

 

 

Well it's handy if you have got little legs :tongue:

[TopLess]

cylinder bore according to the service manual (BR-55): 26.99mm

 

-Eric

 

Isn't there a specific year of BMC that has a larger bore than the rest!

[lymon]

I did some more digging and apparantly there were 3 different sized MBC's used in the Z32.

 

So it might be usefull to check which one you have:

 

46010-30P01 Manufacture date 2/89 – 7/90 (17/16"/26.99mm NA Tokico)

46010-30P02 Manufacture date 7/89 – 7/90 (17/16"/26.99mm TT Tokico)

46010-30P02 Manufacture date 7/90 – 2/91 (17/16"/26.99mm NA & TT Tokico)

46010-30P10 Manufacture date 2/89 – 7/90 (15/16"/23.81mm NA Nabco non-ABS)

46010-30P21 Manufacture date 2/89 – 7/90 (17/16"/26.99mm NA Nabco)

46010-30P22 Manufacture date 7/89 – 7/90 (17/16"/26.99mm TT Nabco)

46010-30P22 Manufacture date 7/90 – 2/91 (17/16"/26.99mm NA & TT Nabco)

46010-45P00 Manufacture date 9/91 – 9/93 (1"/25.4mm NA TT Tokico)

46010-45P00 Manufacture date 2/91 – 9/91 (1"/25.4mm NA & TT Tokico)

46010-45P20 Manufacture date 9/91 – 9/93 (1"/25.4mm NA & TT Nabco)

46010-45P20 Manufacture date 9/93 – Up (1"/25.4mm NA & TT Nabco)

 

-Eric

[John Dixon]

Cheers for that.

Mine's the smaller one, so maybe an earlier one would work better.

Sure NISMO do bigger ones, but courtesy parts hasn't been working all day!