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#1
04-26-2003, 12:23 AM
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300zx brake calipers FS
hey guys, I know you all love the 300zx aluminum 4 pot brakes, I have a set. THey were pulled from a junkyard 90 non-turbo car. Dun know how many mile, need a good cleanup and you could prolly rebuild them to. Front and rear, make offers (email [email protected])
Thanks, Evan 
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#3
05-01-2003, 02:56 PM
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Weren't the turbo brakes much better?
Junk yard; sounds sketchy... Those are my reasons that I do not want...
__________________
I <3 Nissan Yo, yo, yo, pimp juice. I've got the bling bling hookup, biatch.
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#4
05-02-2003, 06:56 PM
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the turbo brakes are a little bigger, and the later year NA brakes were iron instead of aluminum. Those are less desirable, I think the only difference is these brakes are a very little bit mnarrower. They are kinda dirty, and it would probably be a good idea to rebuild them, but they seem to be in pretty good shape, the car I pulled them from was driving less than a week before, it was a collision and I got them AS SOON as the car showed up. If you make a fair offer, they are yours. REAlly nice 4 piston front, 2 piston rear brakes. ALL the stopping power you could need and MORE. Come on, I have nothing to do with these and it is a waste for them to just sit
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#5
05-02-2003, 07:30 PM
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No one wants them not because they are from a scrap-yard, but because the 1990 NA used THINNER ROTORS. Chances are, the only people that will want those calipers are 240SX owners who want Z32 brakes behind rims that dont have much clearance. Getting quality rotors for those calipers is tough, especially since Brembo doesnt manufacturer any.
How much do you want for them, do you have any pics of them? If you can, e-mail me a price.. I may be interested in the front calipers, rear calipers, and the rear dust-shields/cables. If you have those parts, maybe we can work something out. Quote:
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#6
05-05-2003, 01:52 PM
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they are 26 or 28mm while the thicker ones are 30mm........
Aluminum saves some weight but doesn't dissapate heat like the Iron ones do and they are easier to warp your rotors with the aluminum calipers.... I think they were all Iron after a certain year...
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#7
05-05-2003, 06:34 PM
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I am pretty sure ALL of the turbo cars had al calipers. Also, it seems that the aluminum calipers would dissipate heat much faster or they would make intercoolers and radiators out of iron instead of aluminum. Aluminum dissipates heat MUCH faster, that is also why brembo, willwood, etc makes their calipers out of aluminum. Look in a metalurgy book, I guarantee al dissipates heat MUCH MUCH faster
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#8
05-06-2003, 09:09 AM
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tsk tsk tsk........
its a lighter metal, its less dense...... it doesn't absorb or hold as much heat....... therefore istead of absorbing the heat, more stays in the parts around it... rotors, pads..... and the aluminum calipers tear through rotors..... People say that the Aluminum ones are ok for normal street useage, but for racing or heavy AutoX... they all recromend the Iron ones...... People make Aluminum parts to save weight, not because its the best metal for the job... Hence the debate of Iron vs Aluminum blocks..... aluminum is lighter, iron is stronger.....
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#9
05-06-2003, 05:27 PM
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dude, sluminum dissipates heat A LOT faster than iron, there is no argument, it will not hold as much heat as iron (heat soak faster) but with good cooling ducts that is not a problem. As a matter, the reason aluminum is really hard to weld is that it transfers heat really fast. If you aren't fast with aluminumwhen you are tig welding it, the entire piece of metal will melt into a pulle before you even get a spot weld done. Trust me and read up a little bit, aluminum transfers heat WAY faster than iron. Going to a logical argument again, most heat sinks are aluminum, radiators, intercoolers, not just because they are lighter, because they transfer heat faster.
here's a quote and link for you if you think I am too stupid to warrant you actually looking something up. "Most race applications use this type of caliper, because they are generally are made of aluminum which displaces the heat faster and requires both less pressure and less volume to operate." http://www.hotrodheaven.com/tech/brakes/brakes1.htm I am sure there are plenty more where that came from, do a search 
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#10
05-06-2003, 07:30 PM
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haha you guys are close, but not fully correct with either arguements..
From 90-92, ALL turbo Z32's came with large aluminum calipers. From 91-92, the NA Z32 used the larger aluminum calipers, same as the turbo. It was ONLY in 1990, the NA Z32 used the smaller aluminum calipers that use the ever-so-slightly THINNER rotors. From 93+ ALL Z32's used the same cast-iron calipers. As for the arguement between aluminum and cast-iron, I prefer the larger aluminum ones -- those are the ones I have on my car. Its basically a trade-off between weight vs heat dissipation/durability. If you are worried about fitment & unsprung weight, the smaller aluminum calipers are ideal -- they have more clearance behind MOST wheels and weigh less than all of the calipers. The problem with these brakes is that they use thinner AND rarer rotors. My brother has the smaller aluminum brakes on his S14 SE, he never had any problems with the brakes/rotors -- they are fairly durable. If you want a wider selection of rotors and have enough clearance, the larger aluminum calipers are great -- I have those on my S13 and they have never given me any problems. I drive extremely hard and even when canyon driving they are still super reliable. On the 240SX, these brakes are quite good.. its a shame so many Z owners hate these brakes, I guess thats what happens when you are anywhere from 600-1000lbs heavier. The cast-iron calipers are good because they are durable and can withstand some serious abuse. I am sure the calipers can withstand quite a bit of heat before the brake oil starts to boil. However, I dont think these calipers do as good of a job dissipating the heat. I havent weighed the calipers, but I hear the difference isnt TOO severe between the cast and alum. BUT, any weight savings is a good thing if you are concerned with unsprung weight. I dont know why there has been so much talk about warped rotors with the Z brakes. This shouldnt be a concern on the 240SX, especially if you are running good quality rotors. On the Z, I can understand warping the thinner 1990 rotors, and even the thicker rotors.. but not on the 240SX. I use OEM vented (not drilled) Brembo rotors and have had no problems with them. If warpage is a concern, you can always cryo-treat your rotors. ps: All calipers use the same size/diameter pistons and require the same amounts of volume/pressure to operate. Regardless of which you use, it would be a good idea to use the Z32 MC. The MC came in two sizes as well.
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#11
05-07-2003, 02:25 PM
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I have no experience with the z32 brakes but from FreshAlloy.com(a lot more technical forum with some smart guys) just about everyone agrees the iron ones are better to use for heavy brake useage, such as a dedicated race car.... when pushed real hard the aluminum calipers mess up before the Iron ones.... its what just about everyone over there says.... and they do warp the rotors on the 240's...
Those are some smart guys there, a lot are boosting real high and use their cars for racing purposes..... I'll trust their word and superior experience to mine. I don't even post much there just read, those guys will put me to shame as far as knowledge lol.
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#12
05-08-2003, 11:26 AM
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FreshAlloy.. the site sounds familiar, I think I've heard of it.
Oh yeah, I was on there years ago.. if you see a name called "__DO NOT DELETE__" then that is me. I was going by "old_s13" until I got into a disagreement with one of the owners and decided I did not want to be a part of the forum. I recall saying I would piss on him, it was around then he blacklisted my account .. woohoo! I got a top-score!  The cast calipers are made of stronger metal, of course they are more durable. However, the aluminum calipers are better calipers. With good quality rotors and proper ventillation, they should be fine. Besides, I already stated the pro's and con's above.. from there, people have their own preferences. Remember, NO brake system is invincible.. they all have operating ranges and are only capable of sustaining a certain amount of abuse. Lets not forget that soonafter the Z32 was introduced, NISSAN started having financial trouble and began to cut corners with the parts they used to build their vehicles. Most of the early `90's parts were higher quality than the latter year equipment. Some things have been improved with time, other things have just worsened. Look at the Z33, the metal used is very thin and tons of parts are made of plastic to save weight (and money). I know Z owners who have had old Datsuns, Z31, Z32, and now Z33.. and they agreed in the sense that things have gotten more "watered down." They just dont make cars like they used to, eh? Quote:
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#14
05-08-2003, 08:21 PM
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I went to a salvage yard awhile back.They wanted $500 for all four 300zx calipers/rotors.
I wanna know if that's a good deal or not. What do you guys think?
__________________
 1989 NISSAN 240SX Fastback Turbo
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