z32 brake upgrade

[sleepyeyeds14]

so, through all of my research i have done trying to find out how to do a z32 brake swap, i found out that nissan switched to a different Brake master cylinder unit in February 1991. i believe that the bore on the 1990 model was bored to 1 1/16th in and the new one is bored to 1in. does anyone know why nissan changed this or why they might? or if anyone know if it would be better for me to get for my z32 upgrade. also since i dont have enough money to the entire upgrade at once, will i be ok if i use the z32 brake master cylinder with my stock s13 brakes?

[ADDirishboy]

Let's try to only make one thread, KK?

[AZhitman]

You're going about it backwards.

Keep your BMC for now and upgrade the calipers / rotors / pads.

[sleepyeyeds14]

You're going about it backwards.

Keep your BMC for now and upgrade the calipers / rotors / pads.

well, i need a new BMC anyways... so i figured id just get a z32 one...

[AZ89two4Tsx]

I would personally slap on some Q45 fronts and be done with it. They're plenty, especially for a N/A KA car. Along with keeping the oem master cylinder.

[AZhitman]

You're going about it backwards.

Keep your BMC for now and upgrade the calipers / rotors / pads.

well, i need a new BMC anyways... so i figured id just get a z32 one...

Then use either.

I'm using WAY bigger brakes than Z32's and the OEM master cylinder.

[costa_rican13]

You're going about it backwards.


Then use either.

I'm using WAY bigger brakes than Z32's and the OEM master cylinder.

HOW?? doesnt the bmc size not handle well or throw off the brake bias??

[Philipio]

I would personally slap on some Q45 fronts and be done with it. They're plenty, especially for a N/A KA car. Along with keeping the oem master cylinder.

How do you know what he's doing with his car? Q45 brakes aren't plenty for every application.

Listen to the Hitman. Brakes then BMC. Or all at once. My 300ZX fronts are getting upgraded to Wilwoods whenever I get a chance to put them on. I still have the stock BMC. Do I want a new one? Sure, but the brakes work fine.

[upsdude]

are you doing z32 calipers all around or just the front? if just the front you can use the z31 bmc which is a cheaper option.

[Hijacker]

My research had always shown the bore difference to be a turbo/non-turbo situation. However, I will say while the system will function with upgraded calipers etc, they are really touchy with a stock s13 bmc. My car used to lock up way too easily before i went to the 1" bmc.

[chaosli]

i have a r33 one just so my lines are away from the turbo

[TheRealNap0le0n]

Then use either.

I'm using WAY bigger brakes than Z32's and the OEM master cylinder.

+10000

i kept the factory automatic S13 BMC and i have Z32 front and rear brakes.

btw q45 brakes are better for alot of reasons if you dont care about looks... like wheel fitment, price, hassle,etc
braking power is alot more than stock but a bit less than z32...

but im vain and care lol.

[TheRealNap0le0n]

HOW?? doesnt the bmc size not handle well or throw off the brake bias??

no.


my brakes modulate just fine, i just have to work my foot a lil if im panic stopping which is rare.

my brakes lock front then rear, predicably. Unless im downshifting as well then the rears lock first

[AZ89two4Tsx]

I would personally slap on some Q45 fronts and be done with it. They're plenty, especially for a N/A KA car. Along with keeping the oem master cylinder.

How do you know what he's doing with his car? Q45 brakes aren't plenty for every application.

Well, Q brakes are a hefty increase over stock. If he's got plans to make big power, it should have been specified in the thread. And usually if you're gonna make that much power, you know you're gonna need bigger brakes than Z32s.

I'd be confident in a 300+ HP car with Q brakes on the front with good pads all around. Anything way above that, and I'd be looking at aftermarket kits.

[DanThaMan]

I have Q45s on my front and a stock BMC, they work great...noticeable improvement over stock, and the pedal isn't mushy

[sleepyeyeds14]

right now im in the middle of installing the new BMC, but i bought a refurbished one and it didn't come with a new fluid reservoir. does anybody know how to remove the old one??? i cant find any pins or screws to remove. its just stuck... and ive called two auto parts stores and they both don't sell it separately from a BMC...

[nissan_star]

i pulled mine off the stock one and put it on my refurbished. its hard to do but it can be done.