Zedyone_kenobi

I will get you pictures tonight buddy. I am sorry, I have been busy with other, Non Datsun things.

Lets see. If I were stock, I could not sent the full 13V to the points. At least for not very long. So I would have had to run it differently. For instance. I think I would have to connect the black/white (3) wire that gets battery power with the key in the run position to one side of the 1.5 kOhm ballast resistor. Then, since on a 71 the wire that gives the coil its power (green/white) has to go through the tach first and then back to the coil and dizzy. I would have hooked up the green/white wire to the opposite end of the unbridged ballast resistor (thus dropping the voltage going through the tach and back to the coil through the black/white wire (4). This way the tach would see about 10 volts (well less than 13V anyway) , which means the coil would only get about 10 volts, resulting in a weaker spark that would not prematurely destroy the points. If you ran a 3kOhm coil you could bypass the ballast resistor altogether, but your tach will see the full voltage during engine run and your coil would receive more input voltage. Actually, I am not sure how the coils resistance matters at all. The way it is wired.

Update: no luck with what I thought I did. I am not a moron, my setup is fine. Still popping through the exhaust Looks like motorman will get his wish! Haha

OH no, much worse... I will know if I am a total moron in about 3 hours.

It is so dumb, that I would be ashamed to admit it unless it is the actual problem. Yes, suspense thrillers keep the audience enthralled

UPDATE: I have been ordering things feverishly. MSA is out of stock on the Webers, it will take 2-5 days for them to get them. Oh well. IN the mean time, I may have found something that may shed some light into the weaker spark theory. I will hold off my thoughts until I test it when I get home tonight though. But if I fixed it last night, this could be the biggest waste of 18 pages in the history of Z car club.

I can vouch for that Captain. I have both on my bench right now. The SM's are indeed shorter than the OEM N27's. I will snap a pic for you later today if my test runs this evening show nothing.

Well if you use a 3 kohm coil you no longer need the ballast resistor with a pertronix. At least that is the common factoid talked about around here. You are right, my ballast is not doing anything. But I leave it on as a convenient way to connect wires.

I spent some time last night with a wiring diagram, a soldering iron, and a beer looking at my ignition wiring to see if anything is wired funky that could be messing with my voltage going to my pertronix and coil. I discovered a few neat things. First the way the coil gets its power. I think this is cool (although it is old school to most of you I am sure). In the stock configuration when you turn the key to the last position right before you start, the coil gets its voltage after it runs through the ballast resistor. A stepped down voltage if you will to protect the points I would imagine. Now when you turn the key, the ignition sends 12 V straight to the starter AND to the coil and the extra voltage is used to help start the engine with a hotter spark. I really did not know this. But after staring at lines on a wiring diagram all night (I really hate dealing with wiring BTW) this hit me. So I was laying in bed at night and I thought that the way it was wired my pertronix is getting 13+ volts during engine run. I thought that the pertronix had to have 3ohms in place to step down the voltage. Here is a description of how I have mine and how I understand it. Keep in mind I have a 3kohm coil. First check this for sanity, and if okay, hope it helps others.

This is great information madkaw, and further makes me scratch my head that my SU's with SM needles are making me run lean... There has to be something up somewhere else. Anyway, glad to hear your car is running so well. That is awesome! Congrats!!!

I was hoping to keep the stock throttle rods in use. But I have noticed many go with the cables. Can you provide some information on what makes the stock linkage so hard to drive? Thanks again Mike. I am planning out my fuel system. This is almost as much fun as carb tuning. I really love building custom stuff!

Mike W What are your choke cables going to? It looks like you fabricated some sort of improvised choke. Can you enlighten me on that.

I found a carter pump I liked with bushings for vibration and sound insulation. It looks very much like the OEM electric pumps in the 260 or 280 Zs. It puts out 4-7 psi.

Well just ordered my 40mm DCOE's from MSA. Got the holley regulator, but still need to find a good quiet low pressure pump. Looking at several right now. Mr. Gasket, Mallory, Aeromotive, etc. I also plan to use the return line back to the tank as well. Does anybody sell a custom three carb fuel line for Datsuns.

I salute your ingenuity! That is called taking care of business right there! You could sell those!

We are all cheering for you Frank! And of course you know if there is any parts you may need, we can all lend a hand out of our private stashes!

I just had a 30 minute talk with Eiji, and he is a true character and a stand up guy. I have all the faith in the world he will do a great job for me. He seems very good at listening and taking what I truly want to heart. He said I should go with 40mm , and yes, LeonV, you read my mind. Get the Triples set up and running on this car, then move them over the L28 later. I will be ordering 40mm webers VERY soon. I welcome any jetting recommendations via PM soon. We will see once and for all if my SU's were the culprit. I am willing to bet with the webers my lean running issue is gone. I will get a low pressure fuel pump as well, and get that working. I will install a regulator so I can dial the pressure up or down for the SU's or the Webers. I will need to find a heat shield though. Let the fun begin!! I will still run a fuel pressure test on my current engine and a voltage the coil test while I am running. I am making electrical jumpers and a fuel line for these tests.

Good Luck Frank! I wish you the very best! I had to go to North Carolina to get my baby.

I am having an L28 long block built by Eiji. I think he has spec'ed me a N42 block with an N42 head. Nothing crazy. NO HP figure was mentioned, or asked for. As long as its free breathing, revs nicely, and has good idle quality I am happy. I will most likely put Weber 40mm or 45mm DCOE's on it, and a Mallory ignition. Part of me wants to go ahead and order the Weber set up now so I can try them on the L24. But I would wager that it would be silly to buy 40mm triples for a stock L24 and expect them to work on a high compression decent cammed L28. And I would imagine that 45mm DCOE's would be WAAAY to much for my L24. My plan is to slowly take my L24 apart on the side, and bring it back to life slowly. I want to keep the original engine available with the car.

UPDATE: I was unable to get any work done on the datsun Sunday. But I did place an order for a nice little L-series present from Datsun Spirit. Eiji said that should arrive in 2 months. The L24 in my car is living on borrowed time. So the way I see this, we have 2 months to figure this out.

No need captain. I ordered new insulators since then and new gaskets

I could not hear you, I was laminating my NRA card.. HAHA

I can try to see what I am getting while it is being driven, can't hurt. I am also going to try rig up more engine grounds

madkaw, your thoughts are always welcome and appreciated. As are everybodies. I have not checked the fuel pump volume solely based on the fact that at WOT, it does not do this. Keep in mind I replaced my fuel pump thinking that was the problem. Alas, it was not. My old fuel pump was a psi below allowable than this new one, but the problem is exactly the same. I am now putting out correct pressure. I admit I have not checked volume. But I have news! I ran a leak down test... Just performed my leak down test...Here is how. Ran the car for 30 minutes to get her up to temp. Pulled the plugs and valve cover. Hooked up my remote starter trigger spun the engine around until both cam lobes were up on number 1 reached in the car and yanked up the E-brake and put her in 4th gear Filled the cylinder with 90 psi. I did this same thing on each and every cylinder. Here are my results Cylinder #1.....90 psi input.....88 psi output Cylinder #2.....90 psi input.....86 psi output Cylinder #3.....90 psi input.....86 psi output Cylinder #4.....90 psi input.....87 psi output Cylinder #5.....90 psi input.....87 psi output Cylinder #6.....90 psi input.....88 psi output You could hear the air rushing through the engine, and you could hear it coming from the depths of the timing chain somewhere. It was just barely blowing past the rings I suppose. Nothing was seen with the radiator cap off, nothing was felt coming through the carbs or the exhaust. It would seem on the outside, I have a VERY healthy 71500 mile L24. Anybody want to loan me a set of SU's! HAAAH

Good advice, I will certainly look in to it!