25mm (1") Nismo Rear Sway Bar

In 1977 the Japanese S31 Fairlady Z shipped with a 25mm rear sway bar as an option from the factory.

From Dirty S30

Nissan Part# 55611-E4622 - 25mm

Although extremely rare (and extremely stiff) I stumbled across one on eBay and snatched it up.

Most kits that are available for the S30 chassis today are around 20mm. Adding 25% to the diameter of the bar increases the stiffness dramatically. Since I am crazy about rare parts, I totally had to get it.

There isn't really even any information on this part online. Just a couple posts on HybridZ and most of them are from me asking about it!

The beast:

From Z

From Z

From Z

It turns out that this bar actually mounts from in front of the differential. Every aftermarket bar I have seen, on the other hand, mounts from behind.

From Dirty S30

While trying to figure out how to install it, I tossed it on around the back like any aftermarket RSB.

From Z

As you can see, it doesn't line up correctly.

From Z

From Z

A lot of people seem to think that this is too much bar for the street.

I will be sure to let you know.


Special Thanks to the folks at HybridZ for digging up the image at the top and info about the part and how to mount it properly.

(and for laughing at me for trying to install it backwards and upside down haha)

I will post pics from the successful test fitting later.

JDM Fairlady Brochure

Stumbled across these on HybridZ yesterday.
Really cool to see the original literature for the Japanese Fairlady and the Fairlady 2 by 2.

From Dirty S30

From Dirty S30

From Dirty S30

From Dirty S30

Very cool stuff. I really wish my interior looked like that!

"Tach Suck"

I guess after 37 years you have to expect that certain delicate mechanical and electrical components have to start failing. The tachometer in the 240z is evidently one of the more common ones.

From Z

I suffered from "Tach Suck" which is more commonly referred to as, a Sucky Tach.

The needle on my gauge face would stick in random places in the lower RPM range of the face. Sometimes it would rise to 3 grand and stay there, other times it would stick around 1.5k and flutter helplessly in between. I thought sure it had to be getting intermittent signals from the sensor (which as it turns out doesn't even exist lol). The tachometer gets its signal from the ignition coil.

In the same thread that somebody chimed in to help me with my headlight issue, another noble HybridZ member pointed out the cause of my tach issue. The gauge was having a mechanical failure.

So I reached up into the dash from underneath the steering wheel and unscrewed the two Wing nuts holding the tach in place.

From Z

There were four light bulbs in the back of the unit. Two for illumination at night, and two for turn signals.

From Z

There were only four small silver screws holding the assembly together.

From Z

Two more silver screws in the back to remove and three wire terminals.

From Z

After flicking the gauge needle back and forth, redlining the fucker to 10 grand over and over again, I noticed that the needle would only stop at the lower RPMs when the gauge face was flexed just right. If flexed in the opposite direction, it almost always returned back to 0.

From Z

So in my limitless ingenuity (lol) I jammed a couple of washers in to hold the face just right and slapped the bitch back together!

From Z

Back together and the needle is flying free!

From Z

Thanks for the tip Zmanco! Much appreciated.

Thank you cygnusx1!!!

I would like to thank cygnusx1 for teaching me that no matter what, Check the most likely cause of an issue first. Since my headlight was just dim, and not completely out, I assumed that it wasn't the fuse.

"the one dim light means that the right light is not getting 12v directly. It is getting feedback voltage through the other headlight. The cause is probably a bad fuse, fuse box, or connectors for the fuse box. Check all of those things. Take out the fuse box, clean it up along with the connectors, even if they appear clean."

cygnusx1 I owe you one. Email me your address and favorite brand and I will mail you a beer.

From Z

Thanks.