Nismo Slave Cylinder

[aaron240]

I have heard rumors that one of the Z31 slave cylinders has the same diameter piston as the s13 Nismo slave.

Can anyone confirm if it is the Z31 N/A or Z31 turbo S.C.?

[RDM_II]

Turbo.

[SilverArrow27]

So basically upgrading to a z31 turbo clutch slave is just the same as the nismo slave for our cars? Pistons I mean of course...

[Colorado_S14]

If this is true which one do I need, CourtesyParts.com shows 2 different parts. Also S13 and S14 slaves are the same correct?

Turbo 1984 to Aug 1986, 30620-00004
Turbo Sept. 1986 to 1989, 30620-00005

[KSU_S13Less]

I used a Z31 non-turbo one on my old S13. I bought it at Autozone.

[aaron240]

Ok so we can now confirm that either of the two versions of slave cylinder for a Z31 300zx will fit a s13/s14/s15 tranny.

Archive this post?

[SHIFT_KA24DET]

What advangages does a larger slave have?

Does it not make the pedal throw longer now that you are increasing the bore of the slave but keeping the stock master?

[allmotorKA]

Might help change clutch pedal force/feel and modulation for those running extreme clutches. Not sure what the difference in piston diameters is...

[KSU_S13Less]

What advangages does a larger slave have?

Does it not make the pedal throw longer now that you are increasing the bore of the slave but keeping the stock master?

It reduces pedal effort. Lets one run a more extreme clutch without as much punishment.

[Super13]

Is it the 84-86 slave cylinder or the 86-89?
http://www.courtesyparts.com/Z31_clutch.html

also, does anyone know about any other sources for OEM equipment which are as reputable as courtesy parts, I like them, but I need some other place to compare quotes against. ill look, but I appreciate first hand knowledge.

[RDM_II]

Any local dealer. Then subtract 10%.

[Colorado_S14]

Anyone on the year range I can't imagine that no one knows... I cannot believe that Russ does not know

Blake

[RDM_II]

Anyone on the year range I can't imagine that no one knows... I cannot believe that Russ does not know

Blake

Ow. I haven't tried that upgrade yet, remember I'm in an auto for now that's been parked for two months.

[Colorado_S14]

Lol, yea when are you going to get that beast back on the road? I am interested to hear how you like the KA-T and the AT, my friend is contemplating the same thing.

[Jeff240sx]

Lol, yea when are you going to get that beast back on the road? I am interested to hear how you like the KA-T and the AT, my friend is contemplating the same thing.

My first setup was Auto + KA-T. That's not the topic of this thread, so I won't go into it, but PM me or start a new thread if you want people's opinions. I know at least 2 others were/are.
-Jeff

[Super13]

Ill see if courtesy has the specs on it, and i just posted on z31.com, bump.

this thread states a N/A slave cylinder, but there were no results posted

http://forums.freshalloy.com/ubbthre...mp;o=&vc=1

I will edit this post until i get tired of searching...

[catpower]

The z31 slaves are the same 3/4 inch bore as the 240sx. Its probably the same damn part. I suppose it could have an upgraded version of the rubber seal but i doubt it. Ive never heard anyone say what the nismo slave diameter actually is.

[Super13]

courtesy offers up 3 slaves for the z31, they couldnt get me the specs, but they all have different referenced part numbers.

[knate]

The z31 slaves are the same 3/4 inch bore as the 240sx. Its probably the same damn part. I suppose it could have an upgraded version of the rubber seal but i doubt it. Ive never heard anyone say what the nismo slave diameter actually is.

Sorry, you're wrong. Z31 is 3/4", 240SX is 11/16". I didn't think that would make much of a difference, but it does. ACT street/strip clutch has a pretty heavy pedal feel, but now it's only a little stiffer than stock. I'll post pictures later. Very well worth the $35 versus $150+ of the Nismo.

[catpower]

Sorry, you're wrong. Z31 is 3/4", 240SX is 11/16". I didn't think that would make much of a difference, but it does. ACT street/strip clutch has a pretty heavy pedal feel, but now it's only a little stiffer than stock. I'll post pictures later. Very well worth the $35 versus $150+ of the Nismo.

[/quote]

Dont be a [censored] your not right either. The ka24e had a 11/16. The ka24de has a 3/4 bore cylinder. That would include s13 and s14 models. So, if the NISMO is the 3/4 upgrade, your getting ripped off.

[Super13]

I would like to chime (speaking from stupidity) my 91 has real light pedal feel (clutch) and my 92 has like a constipated pedal feel, maybe thats the year they broke. My 91 was so effortlessly pushed in, I knew right where to ride the clutch and not mash anything. my 92 feels like an eclipse or something, ugh. horrid. I love a light clutch, so easy to be nimble with.

also (bump) if anyone knows which exactly z31 slave is the correct one for the 11/16, twould appreciate mucho gracias.

[knate]

Dont be a [censored] your not right either. The ka24e had a 11/16. The ka24de has a 3/4 bore cylinder. That would include s13 and s14 models. So, if the NISMO is the 3/4 upgrade, your getting ripped off.

Hahaha, don't take it too personally. It was an upgrade for me. I haven't seen a size of the Nismo cylinder posted anywhere. If someone wants to pull theirs apart we could find out..

[cosmoworks]

I didn't think that would make much of a difference, but it does. ACT street/strip clutch has a pretty heavy pedal feel, but now it's only a little stiffer than stock. I'll post pictures later. Very well worth the $35 versus $150+ of the Nismo.

Any noticeable problems with clutch disengagement? With a larger slave bore and increased mechanical advantage, you also get a shorter piston stroke.

-Cosmo

[catpower]

"Hahaha, don't take it too personally."
Dont worry, im not.


With the clutch engagement you get a shorter stroke on the slave side but the master side has a longer stroke. So, when you have a clutch that seems to engage very fast, like one with a modified fulcrum point on the pressure plate it will return the engagement travel nearer to stock when you make the slave bigger. Anyone know what size the NISMO slave is?

[benevolent]

no need to pull it apart, it's stamped on the side. unfortunatly i'm not at home where i can look at mine,i think it's 13/16" where the stocker is 3/4". i'm not sure though and i've been drinkin a little. and the "stock" i'm referring to is S15.

[knate]

Any noticeable problems with clutch disengagement? With a larger slave bore and increased mechanical advantage, you also get a shorter piston stroke.

-Cosmo

The clutch engagement area is larger with a larger slave cylinder. It makes the car easier to drive, just takes a day or so to get used to it. Now I don't really notice it as much anymore, but my girlfriend can actually drive the car

[Super13]

-- from z31.com

By: Jason84NA2T on May 7 2005 9:10PM

I recently used a 84NA slave cyl with an 88T transmission and it worked fine. As you know the 240SX trans is the same as the NA Z31, and the 87-89T trans very similar to the Z32 TT trans. I would guess they interchange, but I have seen no substantial physical differences between them. The rod is a different part number in the fiche also, so it's odd.

I believe the Nismo unit, by simply having a larger slave cyl piston will give it more force potential. I'll assume you know there is a fine point of adjustment to increasing the size of the slave cyl piston RELATIVE TO the master cyl piston. Because the slave cly piston is bigger, it will take more fluid (or more motion of the master cyl and hence the foot) to accomplish the task. So, I would think it should reduce your clutch effort with a stiff pressure plate..


** has anyone ever tried swapping a z32 or to that effect master / slave cylinder combination? (assuming larger hydraulic compression)