Z32 master cylinder, huge problem

Post by **matt4pl** » Fri May 06, 2005 2:13 pm

I got everything hooked up and when i started bleeding the system, brake fluid started leaking out of a small port located between teh front and rear fittings. its about 6 MM in diameter and i have to clue what it does. there is no visible thread or anything. i need to plug this thing up or something... car has been in the garage on stands for almost a week with stupid problems and now this. this is a remanufactured tokico master cylinder. any help or ideas would be very appreciated

Post by **Dano** » Fri May 06, 2005 11:15 pm

did u get the lifetime warranty? If so just go exhange it. I just fixed my roommates car which has had a world of problems since he started a bigger brake upgrade, warranty is your friend

-Dan

Post by **frsh13** » Wed May 11, 2005 8:05 pm

edit: didnt see your very similat post, seems you already figured this out, sorry

that is not your problem, any master cylinder from a 300zx will do that once you install it on a 240. Now to correct the problem you need to remove to middle allen key fitting (leaking one), and plug it up with the old fitting from your 240 master cylinder or order some part number from autozone that might fit(not sure someone posted about this a few days ago). This is just a short explanation, to get the FULL story on the master cylinder situation you are having check out http://www.importnut.netthey have a whole write up on the 300zx brake swap and a section just on the MC. Lol i only know all this because i will be doing my front 300zx brakes 2moro and i will also be running into the same problem you are having.

Post by **skydragoness** » Thu May 12, 2005 4:21 am

question.................................

I run front Z32 26mm brakes, and i don't have any issues with 'touchiness' or not being able to modulate. But, is it mandatory that i run a Z32 master cylinder? My OE one is about 1.5 yrs old so it's working fine although i do notice that i can't heel/toe due to the fact that by the time the right side of my foot can touch the gas pedal to 'blip' it i'm already fully engaged on the brake pedal. In other words, i don't have to press that far to get the brakes working. So i just rev-match for now. Any thoughts?

Post by **matt4pl** » Thu May 12, 2005 8:09 am

well you dont really have to upgrade but its always a nice touch. u can also adjust your brake booster to change the engagement point. i think that'd work for you sky, since you can keep the firmness of the pedal but change at which point the brakes are fully clamped

http://www.zilvia.net/faqs/arc...r.asp

Post by **Hijacker** » Thu May 12, 2005 2:52 pm

skydragoness wrote:question.................................

I run front Z32 26mm brakes, and i don't have any issues with 'touchiness' or not being able to modulate. But, is it mandatory that i run a Z32 master cylinder? My OE one is about 1.5 yrs old so it's working fine although i do notice that i can't heel/toe due to the fact that by the time the right side of my foot can touch the gas pedal to 'blip' it i'm already fully engaged on the brake pedal. In other words, i don't have to press that far to get the brakes working. So i just rev-match for now. Any thoughts?

that would be touchyness. you can't get a full range of motion for your brake pedal. I have an issue with early lock up with my 26mm brakes, and i'm using an S13 MC. I've had to make a panic stop or two, and when I stand on the brake pedal too hard, it'll bring the brakes way too close to lock up, and I can feel pad fade as i modulate the pedal to keep the calipers from locking.

Post by **KFL** » Thu May 12, 2005 6:21 pm

tenkawa_akito wrote:
that would be touchyness. you can't get a full range of motion for your brake pedal. I have an issue with early lock up with my 26mm brakes, and i'm using an S13 MC. I've had to make a panic stop or two, and when I stand on the brake pedal too hard, it'll bring the brakes way too close to lock up, and I can feel pad fade as i modulate the pedal to keep the calipers from locking.

I have yet to lock up my fronts and have not been able to as of yet. Running 26mm/blanks/hawp hps pads. I've been meaning to buy the 200sx bmc its more proportional and its a direct bolt in no having to get the fitting like the 300zx mc.

Post by **Hijacker** » Fri May 13, 2005 4:12 am

I've got a 1 1/16th Z32 BMC sitting in my room. It was an AC delco unit i snagged off of ebay for about $70, but unfortunately doesn't have a seat for the middle line, nor wil any seat I've managed to cut out of other MCs fit. I've got a few tricks up my sleeve still.

The only time I've locked my brakes was on the autocross course. That was a combination of heavy braking, old racing tires, and bad tarmac.

Post by **skydragoness** » Fri May 13, 2005 11:45 am

KFL wrote:I have yet to lock up my fronts and have not been able to as of yet. Running 26mm/blanks/hawp hps pads. I've been meaning to buy the 200sx bmc its more proportional and its a direct bolt in no having to get the fitting like the 300zx mc.

you don't say... i've heard of the 200bmc being used, is this a better option for front Z brakes and rear OE brakes? And when you say 200sx you mean the ol' S12 chassis from the 80's correct? I might actually do that, since i like the fact that it's a direct-bolt up. Does any have any faq/links about the install?

Tenkawa: You know, i don't have an issue with them locking up but i do think there should be a bit more room for modulation, i mean, i can modulate now, i can trail brake through turns with no adverse effects. But is it normal to have the brakes fully engaged at 1/2 thru the pedals travel? I don't want to upgrade my m/c if it means the pedal is going to get mushier. I just need about 3 inches more room for modulation

Post by **KFL** » Tue May 17, 2005 6:25 am

skydragoness wrote:
you don't say... i've heard of the 200bmc being used, is this a better option for front Z brakes and rear OE brakes? And when you say 200sx you mean the ol' S12 chassis from the 80's correct? I might actually do that, since i like the fact that it's a direct-bolt up. Does any have any faq/links about the install?

Tenkawa: You know, i don't have an issue with them locking up but i do think there should be a bit more room for modulation, i mean, i can modulate now, i can trail brake through turns with no adverse effects. But is it normal to have the brakes fully engaged at 1/2 thru the pedals travel? I don't want to upgrade my m/c if it means the pedal is going to get mushier. I just need about 3 inches more room for modulation

Yes a direct bolt in, friend has it on his s13 with fron z brakes only and pedal is firm.I believe it was off '86 200sx n/a what should be used.Just follow the 300zx install sans the having to do the fitting part etc..

Post by **Hijacker** » Tue May 17, 2005 8:53 pm

skydragoness wrote:Tenkawa: You know, i don't have an issue with them locking up but i do think there should be a bit more room for modulation, i mean, i can modulate now, i can trail brake through turns with no adverse effects. But is it normal to have the brakes fully engaged at 1/2 thru the pedals travel? I don't want to upgrade my m/c if it means the pedal is going to get mushier. I just need about 3 inches more room for modulation

it doesn't make it mushier, it just allows more travel. which allows for better modulation. You won't feel like the calipers are fully engaged at half pedal.

Post by **gogg** » Wed May 18, 2005 7:29 am

Um, there is a very easy way to adjust the brake engage point, I have done it myself. All you have to do is shim the master cylander out with washers off the brake booster. My brakes are at the point where it takes a bit of force to lock them and I can adjust brake force very easily which is good for tricky turns at the track,

Z32 master cylinder, huge problem

Z32 master cylinder, huge problem

Re: (frsh13)

Re: (skydragoness)

Re: (tenkawa_akito)

Re: (KFL)

Re: (skydragoness)

Re: (skydragoness)

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