MX-3.com

Keep me posted. I'd like to upgrade my brakes, already have slotted rotors, hawk/EBC pads, s/s lines, speed bleeders and I'm still not happy with brakes. My aunt's 94 altima had super touchy brakes, it would put you through windshield if you weren't careful.

mitmaks wrote:Keep me posted. I'd like to upgrade my brakes, already have slotted rotors, hawk/EBC pads, s/s lines, speed bleeders and I'm still not happy with brakes. My aunt's 94 altima had super touchy brakes, it would put you through windshield if you weren't careful.

You know it may just be your pads. I ran the hawk pads on my RS for ever, and they were not very functional until after you heated them up a bit, then i could lock the brakes up at 60. My RX8 I ran EBC's all the way around and the same kind of thing it took a while to warm up, like rush hour traffic would put you through the windshield, but if it were cold out and you were driving on the freeway you had to step on them and hold then let off and repeat then it would stop on a dime. my GS has EBC's on the rear and some other pad on the front with SS lines and just the GS master and it seems to stop quite well I was surprised actually.

I had a thought the other day, and someone tell me if i may be off track but with everyone saying they have squishy brakes but they are bled and so on. I wonder if the boosters are starting to go bad. or at least the one way valve in the vac line from the booster to the plenum. I came across remaned boosters and figured it might be possible for them to go bad, I have never opened one up so i couldn't really say. a thought though

It might be just me, since I usually expect more out of things> I'm a perfectionist lol
Compared to my cousins civic my mx-3 brakes are AWESOME. I just want better feel, less effort when braking.

Josh wrote:The caliper in the picture looks like a genuine Mazdaspeed caliper.

It's actually a Nissan Z32 caliper with the Mazda logo painted on. But it's the same idea as the RX-7 caliper.

_-Night-Shade-_ wrote:

Josh wrote:The caliper in the picture looks like a genuine Mazdaspeed caliper.

It's actually a Nissan Z32 caliper with the Mazda logo painted on. But it's the same idea as the RX-7 caliper.

Nice, I know the other day I saw a genuine DD mazdaspeed caliber for sale and that look similar, same color even. They just had mazdaspeed across them vs the Mazda logo.

If your looking for a truly brilliant brake pad may I suggest/recommend some Mintex 1144.
Yes they are nearly double the price of the EBC's but well worth it imo
I had them on my 205 and will be using them on my '3 once I have some mo powaaa!

I have a set of these sitting in a box in my basement that I should clean up a bit and put up for sale. The S13/S14 crowd eats these up as they are a direct bolt-on for them.
There are 3 versions of the 300ZX/Z32 brake calipers. The early TT had the aluminum bodied type calipers used with 30mm rotors and the early NA Z32 used a similar caliper but only 26mm used with 26mm rotors. Otwardly, they look the same. The later models TT and NA booth switched to the 30mm caliper but were made of cast iron instead of aluminum.
The much sought after calipers are those from the 90 TT. Which are the ones I have.

_-Night-Shade-_ wrote:

mikeinaus wrote:uhm your planning on fitting rx7 calipers or are already using them? ive never herd of this upgrade before i wonder how much work is involved? probably a tun im guessing...

fyi this mod sounds cool, when are you planning on attempting this josh? do you think this would give similar brake feel to newer cars? ive always found the mx3 brakes to be "squishy" even when properly bled.

=)

Do you have to use millenia master cylinder with the booster or do you use mx-3 booster?

mitmaks wrote:Do you have to use millenia master cylinder with the booster or do you use mx-3 booster?

MX-3 booster will work just fine. the Millenia will just work better

But does Millenia booster bolt onto mx3 firewall or you have to modify it

anyone know what size piston the mx3 calipers use? front/back would be useful information...

just played around with pascals law (Force =Area X Pressure)) a bit... im doubtful this mod would make an improvement, it may even make braking harder. if its noticeable it would reduce pedal travel slightly because of the increased fluid volume but brake pressure would actually be lowered slightly (if my math is right) and you would have to press harder to get the same braking force.

MX3 master cylinder
100lbs(input force)/ .94"(cylinder volume) = 106.4psi, with a 2" caliper piston (estimate) you would get 212.8lbs of force
Millenis master cylinder
100lbs(input force)/ 1"(cylinder volume) = 100psi, with a 2" caliper piston you would only get 200lbs of force.

if my math is wrong please correct me, but my understanding of hydraulics is you would want to shrink the input piston diameter or enlarge the output piston diameter to increase output force (this is the whole point of hydraulics). im actually learning this in class this week...

example
a 1" input piston with 10lbs of force and a 1" output piston would yield 10lbs of output force
a .5" input piston with 10lbs of force and a 1" output piston would yield 20lbs of output force but half the stroke (travel)
a 2" input piston with 10lbs of force and a 1" output piston would yield 5lbs of output force and double the stroke

ideally youd want to mod in a smaller diameter master cylinder. anyone know the bore of the rs/323/protege's master cylinders are?

You're right in principle, though I don't follow your math.

Pressure = Force / Cross-sectional area. So it follows logically that if the area of the piston gets larger, and the input force is constant, less pressure will result. Where is gets interesting is when you start playing with the piston size in the caliper. Using the same relationship when pressure is constant and the area of the piston it is applied to is increased, the resulting force is larger. So if you increase the cross-sectional area at the caliper, as I have done by using 2 piston subaru calipers, you increase braking force significantly, but you also increase the volume of fluid that must be pushed to actuate them. So by increasing the piston at the master cylinder which generates the pressure in the system, you do increase pedal effort, but decrease pedal travel. The end result for me is a better braking system overall with less total effort and much more braking force.

Brake master cylinder selection is absolutely a trade off between travel and feel.

for your situation it makes sense to have the larger millenia master. i was under the impression people were planing on using this for stock calipers. bigger calipers need more fluid so they need a larger master cylinder. from what im learning master cylinder size vs caliper size is a delicate balancing act...

i dont know if its possible, or what the internal design of the millenia calipers are, but there is a type of master that has a larger diameter chamber behind the primary seal. this larger chamber forces more fluid past the primary seal threw the bleed holes into the pressurized area as the piston(master cylinder) pushed threw a bottleneck from the secondary seal. its kind of hard to describe but there is basically a fluid control valve above the vent port and the replenishing port. this pic kinda shows what im talking about. its basically used in multiple piston caliper systems where more fluid is needed, but retains the pressure created from a smaller diameter master cylinder.