Zed Head

Actually these numbers do look like a bad regulator, IF you are back-probing the S (yellow) wire. But, If the yellow wire is the wire to S and you're unplugging it to take a measurement then you are removing the Sense wire to the regulator. Anyway 15.1 volts is too high for a ZX internally regulated alternator.

Maybe your jumper wires are tied to a flasher circuit somehow. I would take another look at the wires you used the jumpers on. Use a meter and find the one that is always hot. Connect it to S. Find one that is only hot with the key on, connect it to the L terminal. Don't try to use jumpers at the plug, just run a new wire to the alternator terminals.

Another interesting thing about the Z in the ditch is that the video is a rally video. There was a copilot giving instructions about the the course. So, kind of embarrassing that a Z is in the ditch but all of those odd looking other cars stream on by. The copilot gave poor instructions or the driver didn't handle the car well. Also interesting that it went in nose first, not back end first, as far as you can tell. Kind of looks like they just drove right off the edge and in to the ditch. Anyway, another Z makes the new world of Youtube videos. Too bad there's no footage of it driving before it ended up there. Maybe it wasn't actually in the event.

The irony here is extreme.

As RacerX is pointing out you'll need to talk to DMV eventually unless you want to try to cut up the remaining metal and sell it directly to a scrap yard. Your local DMV people will know. Best to just call and talk directly to a real person.

I almost bought a car with no title from a guy in Washington. He wanted to meet me at the DMV where he would show various documents to apply for a "lost" title. Maybe that's what RacerX meant. I declined though, (luckily, since it was a real turd and I found a much better car later) since with a lost title you need to have people attest to the fact that they know that the title was lost and that they can attest to the chain of ownership. If it turns out later that it wasn't then there's a mess that you have to resolve. Like if somebody dragged an old car from a field and sold it then the real owner showed up later. Unfortunately Reptoid there is a real chance that you bought a car that was, in essence, stolen. Probably not, but who knows.

p.s. and just wondering - have you ever raced a car? Or driven it to the edge on a country road? Can't really tell from your posts, they seem more intellectual and related to what seems to be your profession, which seems to be professional photography. No sign that you've done much driving of the extreme type.

Thanks HS30. I posted the picture and the question so that people who know could confirm either way. Good information with an insult added for flavor. As usual.

The front of the car seems too wide, wider than the rear. I looked for other small clues but they might have been modified away. There is no hatch release button visible. Can't see the emblems on the quarter panels. The rear bumper seems too thick and has no rubber "nerf" bumpers on it. It's just a very straight and flat piece of chrome. I've seen other European cars that look similar to the big brands. Just couldn't be 100% on this picture. There's probably a writeup of the even somewhere that has the cars listed. Bummer that the car ended up in the ditch. Doesn't look like that difficult of a turn. You can see the ditch way before you get close.

... mistaken identity Does this not look like Z? But it's off. Not sure what it actually is. 1:17.

When you say rotor do you mean hub? It's attached to the disc but many people think of the rotor as the disc itself. You can buy things called "rotors" that have no hub attached. Just a brake disc that fits over wheel studs. I don't know how they ended up being called rotors. A picture would be good, even one from the FSM. I know that they early 240Z hubs are different from later hubs. Scalloped versus round if I remember right. Not sure about dimensions or caliper fitment.

Grease the rear driveshafts' u-joints. The propeller shaft u-joints might have Zerk holes also. You might need to get a Zerk fitting since Nissan plugged the holes with screws from the factory. The ball joints need grease also.

Looks okay in that picture. As said before, check all of them. If you want to get a better idea, mark all of the wear pads with some layout fluid or a magic marker then rotate the engine a few times. The cam will rub away the marking and show you what's happening. Some of the wear might be from before the new camshaft was installed. Good luck.

This angle of the one that you think is off-center.

That's not good. Can you get a shot from the side to see if it's up on top of the edge of the lash pad. Might be that you actually have a very loose rocker arm. The end of the rocker arm should sit between the two ears. Can't tell which one you're looking at.

A cam lobe that's dropping off of the edge of the wear pad could be the cause of the noise you're hearing. The pattern is definitely "wrong", out of spec., but as RacerX said some people do it on purpose to gain a bit more valve lift. Overall though, the odds seem good that you'd be better off with the proper lash pads to get the wear pattern centered. The three that you showed seem very close, the middle one might even be the noisemaker.

Take the same picture from the other side. Compare to RacerX's pictures.

You can see the wear pad without removing the rocker arm. It's more difficult but a bright light and holding your head in the right place makes it possible. They're facing up, right there under the cam lobes. Worth taking a look before you get too deep in to things. Actually you were looking at them when you were measuring valve lash.

You might take a close look at the wear pattern on the rocker arm pads. Kind of sounds like valve train noise on one or two cam lobes. Just a guess. With an aftermarket cam the right lash pads might not have been used. Definitely sounds like it needs fixing. The engine sounds pretty good overall but the noise is bad.

Reptoid showed how a normal timing tab and damper pulley work together in post #11. You have to be able to eyeball where the mark is when your timing light flashes. Unless you put up a new video nobody knows what the actual noise is that you're hearing when the engine is running. Your video was the wrench on the camshaft sprocket. Here's Reptoid's picture and yours. All I'm saying is know what you're working with. We're at post #42 and there's still no reliable way to check ignition or cam timing. Engines are all about timing.

I'd spend some time figuring out what you have and what shape it's in. Get the numbers of the cam, find TDC, get a proper set of timing marks installed, set your distributor correctly to TDC, measure cylinder pressures to see if they're all balanced, etc. Kind of seems like you just bought this Z with a modified engine and started driving it. How did the PO set up MS if he couldn't even use a timing light to see the timing? Your "doofer" is miles away from the damper. (p.s. apparently doofer is British for doohickey). Here's some stuff on what you probably have under the distributor cap. https://www.diyautotune.com/product/54-mm-optical-trigger-wheel-for-nissan-l28et-or-vg30e/#tab-ywtm_78211 https://www.diyautotune.com/support/tech/hardware/nissan-trigger-disc/

Map location says Salt Lake. He says he's from Houston. 1st post. "experience about the Z"? Odd grammar. Hallmarks...beware.

But how do you know? Maybe it was for both. Or either. Or an unintended benefit.

I wonder if Nissan was changing the shape of the curve to get more charge time with the ZX reluctor setup. Also still wondering about the ZX turbo ignitor swap with the GM HEI module. The 5 volt reference never goes negative. Anyway, neat stuff. Different from the usual. Here's your other post with the ZX wave form. Post #261.

Yes, if you have a loose pulley removing the belt should remove that as the possible cause of the noise. But, the downside is you'll have to loosen the alternator adjustment, which can be difficult if you haven't done much engine work. You're in that danger zone of learning as you go. You're probably going to break some things. Really, I wonder now about your lash adjustment if you don't know what a fan belt is. Again, no offense intended. Find those youtube videos and watch many. Have you looked at your ignition timing on Megasquirt software?