Zed Head

Is it failing closed or open? Some voltage or no voltage? The ballast resistor has a coil of wire that adds the resistance. Might be failing open somewhere. Probably at a connection. Details of the test procedure might give some clues.

And the ballast resistor might have a short. It's part of the total resistance on the primary circuit, that passes through the module to ground.

Have you measured resistance through the coil? Too much current through the module might be overheating it. Might have a bad coil.

Maybe it needs a better module ground. And/or heat sink. The module looks like the typical GM module that grounds through the mounting points, and sinks heat through the contact of the bottom with the mounting surface.

Don't assume that new aftermarket u-joints will be better/tighter than used Nissan joints. Nissan's specification is very precise. Each joint came with clips of varying thickness so that play could be adjusted and set correctly. New aftermarket joints come with one clip thickness for all. I replaced a set on my car and they didn't seem any better. I actually removed them all and returned them. They were Precision from O'Reilly's. The Nissan joints are greaseable and are often just fine after a shot of new grease.

What would be the reason for avoiding the coil power supply if a relay is used? If you're using an internally regulated alternator and it's wired correctly the L(amp) wire might work if you connect between the diode and the alternator. Or, since you've rewired for the ZX alternator there might be a leftover wire that was used for the regulator. You probably used L but did you use IG? Might just be sitting there waiting for you.

The good shops can find the specs or just take measurements. And there are aftermarket propeller shafts out there. Nissan calls the center longitudinal shaft propeller and the two "half-shafts" drive. You need to be aware of one big problem with 1975 though - Nissan used a unique flange bolt pattern on the differental. 76, 77, and 78 won't work on a 75. Motorsport Auto (TheZStore) knows, on their Replacement page. But not on their Performance page. Oops. https://www.thezstore.com/category/935/replacement-driveshafts Don't buy a Performance shaft from MSA. https://www.thezstore.com/category/827/performance-driveshafts

It looks about right. If you pull on the lever that the cable attaches to you'll see how it works. Each time you pull the parking brake lever that arm over the notched/toothed wheel moves over the teeth. As the brake shoes wear eventually the end of the arm catches one of the teeth and rotates the tightening mechanism, making it longer. When it's assembled correctly the end of the arm sits right on the teeth. An illustration of your picture is in the Brakes chapter.

Your links are broken. Maybe create a Google Drive photo album and provide a link. Or just copy and paste them in to your post. You can do that on CZCC. And, if you can't get a picture up, a list of the accessories might help. All the way to the AFM, or back to just a water pump? Exhaust manifolds? Alternator? Good luck. Somebody will buy it.

The frame rails (body stiffeners/subframe) are available. A not uncommon problem. https://zcardepot.com/search?q=frame+rail&type=best-selling The car has independent rear suspension. There are two drive shafts in the back and no single axle. The inspection probably identified a misaligned wheel. That could simply be worn control arm (transverse link) bushings. Or even spindle pin bushings. Also readily available. https://zcardepot.com/search?q=bushings&type=product One of the main problems with the AFM swaps is that the EFI system is designed for a certain range of air flow. Once the AFM flap is wide open there's no more control. Nissan adds 27% extra fuel at WOT, probably to compensate for that. Since you changed three/four things at once it might be worthwhile to go back to the original AFM and see how things are. Also, 28 psi at idle is not drastically low. Was the measurement taken with the engine running? There's always more tuning to do with the EFI system after they've sat unused for a while. Good luck.

Actually, the problem is that the web site is inconsistent. They do say that the Masterpieces are factory correct restorations. Then they say something different in the Museum. https://s30.world/masterpieces S30.world launches “The Masterpieces program” "A celebration of Nissans S30 platform A limited-run of factory-correct restorations of the iconic Datsun 240Z will become available, with the first one to be sold at auction in the United States on October 23rd 2025. This unique program is focused on the full, factory-accurate restoration of Datsun 240Zs, also known by the S30 chassis code, to a level of detail that makes them identical to how they left the production line over 50 years ago."

I've realized what part of the problem might be. They don't actually show any "Restorations". They talk about the restoration process, and use the words "as they left the factory" or something like that, here and there on the site, but never actually say "here is a restored car". The Restorations sub-menu only shows Masterpieces, with Masterpieces, Icons and Heroes in the "museum". There is no Restored sub-menu. And they left some "outs" on the Masterpieces page. So, which is it - are Masterpieces restored or not? Can't tell from the ad copy. Highlights are mine. Overall, it looks like they do typical "get as close you can" restorations. Not "as they left the factory". Still looks like an exciting endeavor. Very interesting. The overpromising is the problem. Probably that marketing guy's fault. "Masterpieces S30s restored in detail. We are proud to have some of the first built LHD S30s in our collection. These include HLS30-00022 and 23, in addition several restored and unrestored 1969 produced S30s. We also brought to life some (as yet) unknown stars, such as cars with EU specifications and also with Portuguese specifications for living."

Find out and/or tell us which car is going up on BaT and let people go to town. It's going to happen anyway.

The car that SpeedRoo was talking about is also in the Masterpieces "museum". Once again...

Thank you. https://en.wikipedia.org/wiki/Walter_Winchell

This is one of those examples of how your unstoppable urge to dominate leads you to make simple obvious errors. The car is in the "Masterpieces" section of the web site. Is it an error on the web designer's part? It's not supposed to be there?

There is actually quite a bit on the S30.World web site. Fun to browse. There are stories. https://s30.world/collection/datsun-240z-hls30-00057-ca Can't wait to see which one comes up on BaT in three weeks. They should just disclose it now so people can look through the details on the web site. And how big is the "limited run"?

Just having fun here! I came in second place in my third grade Spelling Bee contest. These things catch my eye. Somebody missed a detail on one of the Masterpieces presentations...

So, here's more of the story. Didn't realize that HS30-H was "consulting" for S30.World. Is it a paying position? On the board? Stock options? Maybe it's been disclosed, but I don't recall seeing it. S30.worldS30.world - The platformThe platform

The current topic is - do these relative "newbie" restorers have the same concept of what "restoration" means as the "old-timers". Is it okay to remove the things were there "as the car left the factory" and call the car "as it left the factory". In literal terms the answer would be no. The statement is not true. The facts shown in the pictures seem to clearly illustrate this. They are "perfecting" the cars by removing the idiosyncracies of the high volume manufacturing process. The things that give each car originality, and make them interesting to people that want to understand how the cars were made back then. There's nothing wrong with doing that, removing the "defects", they just need to clean up their marketing prose to give an honest representation of what they're doing. Their whole web site is kind of grandiose. That's the whole thing, summarized. My posts and links are meant to help understand who these newcomers are.

The switch on top of the steering column has the power supply contacts for both the running lights and the headlights. Have you opened it up? Search "headlight switch" and "headlight switch hot" on the site and you'll probably find some good threads. The contacts get pitted and stop working, or the heat causes the solder joints to break.

RNM at $25,000. Reserve too high or market too tight with their money? Scary times ahead here in the States.

Naaa. I'm just trying to figure out who's running this new Z car parts store. And, as usual, you're ignoring what was written and projecting your own thoughts in order to create an argument. These guys clearly state that they intend to restore the cars to how they were as they as they left the factory. SpeedRoo pointed out some things that were not that, but you just ignored that reality and chose the argumentative path instead. Typical. They're just selling car parts, in the end. Nothing wrong with that, but nothing noble about it either. The Z car market just looked like a profitable one. Good luck to them. S30 World - The place for the S30 familyS30 World | Your online Datsun and Fairlady Z parts shopS30 World offers a selection of premium products designed to enhance your Datsun. Explore our quality parts to restore your Datsun or Fairlady Z.

I wonder who the "restorers" are. They seem very proud of their skills, but they really haven't been around that long. Since 2019. Apparently their marketing manager was born in the back of a Datsun. https://s30.world/masterpieces "S30.world launches “The Masterpieces program” A celebration of Nissans S30 platformA limited-run of factory-correct restorations of the iconic Datsun 240Z will become available, with the first one to be sold at auction in the United States on October 23rd 2025. This unique program is focused on the full, factory-accurate restoration of Datsun 240Zs, also known by the S30 chassis code, to a level of detail that makes them identical to how they left the production line over 50 years ago. Each vehicle in the Masterpieces program keeps its original exterior and interior color and undergoes a complete, ground-up restoration. The process is guided by an obsessive commitment to authenticity, where every component is either restored or remanufactured to original specifications. From the expertly built drivetrain with its matching numbers engine to the flawlessly restored original interior, right down to the smallest original equipment fasteners, nothing is overlooked. “No expense or effort will be spared to achieve this peak level of quality,” says Chris Visscher, founder of S30.world. What truly sets these examples apart is the craftsmanship applied to the bodywork. Every shell is meticulously returned to its original condition with such precision that no trace of welding or repair is visible, even under close inspection by the most trained eye. All spot welds are recreated exactly as they were applied by the factory, matching both the original pattern and technique." https://s30.world/our-company "In 2019 Gustav Oplasnik and Chris Visscher decided to join forces. The desire to do the best possible restoration with an S30 was and still is our passion. The foundations of S30.world are passion, knowledge, craftsmanship, determination and cooperation. Today we are able to do the best possible restorations on S30s and the time has come to make this available to others worldwide as well. Our next goal is creating an international platform to promote the love for S30s, our restorations and the parts we sell. To make that happen, Florian Steinl became our marketing and content manager. Florian shares the same passion for S30s as we do, since he was born in the back of a Datsun."

Recreating the various oddities/imperfections that happen during the factory assembly of the car would be a restoration. Removing those inconsistencies, like the overspray, would be "perfecting", in my opinion. Removing the stuff that they think doesn't belong. It will be interesting to see what types of finish they used on the hardware. Will they use what appears correct, or what would be "correct" for the time of manufacture? How does one tell? Apparently this is the first appearance on the market of one of their "restorations". Kind of surprising how many they have. And why are they are selling?