Everything posted by Captain Obvious
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We're bringin' back the Flat Tops!
Agreed. The -2 carbs are certainly better. I don't think they ever got the bugs worked out of the -1 and just bailed. It's hard to come up with a post-mortem engineering analysis as to what happened with the progression from -1 to -2, but if I had to guess it was something like "Ooops! We better change that, and quick!" Couple other comments. First, don't throw away your old float bowl seals. The new ones have a tendency to swell significantly when they come in contact with gasoline (stupid, right?), and you may find yourself wanting to resort back to the old ones and a smear of fuel resistant sealer. So try to carefully pick the old ones out of the grooves without tearing them. Also, don't give up on the throttle shaft bushings just yet... Just because the hole is off center doesn't necessarily mean that it is oval worn. In fact, the bushing in your pic clearly has more steel on one side than the other, but I suspect they were pressed into the body and then line bored and reamed as a final step to assure alignment between the two bushings. And because of that, they may have ended being machined in such a way that the center hole is not concentric with the outside of the bushing. That doesn't matter... All that matters is that the two of them are in alignment with eachother and are in the center of the carb throat. I would expect that even if something is worn some, the steel shaft would wear a whole lot faster than the steel bushing. So if you stick a 10mm rod into the bushing, is it all sloppy like, or is it still a good fit? And about that green coating? I suspect it's a lubricant. So they don't have the sticky brass of the shaft riding on the steel bushing. I wasn't there when they designed it, but I suspect it's meant to be slippy. (That's a mechanical engineering term, isn't it?) And last... Too bad about the broken alignment cone on the suction piston cover below. Is that a test piece just for clean-up and polish, or is that one that you were going to use on the final product?
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We're bringin' back the Flat Tops!
Nice!! Haha!!
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We're bringin' back the Flat Tops!
I'm not sure what you're asking here... If you're asking simply how you are supposed to remove the float pin, then you unscrew the cap covering the end of the pin, grab the pin lightly with a pair of needle nose pliers, and slide the pin out of the carb body. If you're asking "I got the cap off the carb body and can SEE the end tip of the float pin, but it's stuck and won't come out. What do I do?" - Then the answer may be found in this recent thread where we were discussing just such an event: https://www.classiczcars.com/forums/topic/60828-so-were-doing-a-73-restoration-project/?page=2&tab=comments#comment-560533
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Cody's Goon
Well of course there's no guarantee that it would be the same, but I wouldn't be surprised if it was. Have you turned up a schematic of the tach circuitry? I've not looked for such a thing.
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Interesting read
Out of curiosity... Why would you go through that effort? What's the advantage?
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We're bringin' back the Flat Tops!
Love the pic of the NOS nozzle.
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Cody's Goon
Well with nothing similar to compare it to, 40mA (.040A) sounds completely reasonable to me. I've lost the details. Was there a tach installed before? Or are you putting one in where there previously was none? Point is... Do you have a second tach that you could compare against the one from the Goon? Or (being of the same inductive pickup concept and from same manufacturer and close to the same age....) Is there an early 240 tach that you could run the same test on for comparison?
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Datsun-240z Vs Fairlady-z432
My pleasure. Glad to help. And thanks for the great pictures of how your mirrors work in traffic!
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Datsun-240z Vs Fairlady-z432
Hi Kats, I'll try my hand at a translation. "Downfalls" means "drawbacks" or "undesirable properties" or "weaknesses". The questioner was trying to determine if there were any problems with mounting the mirrors on the fenders when compared to mounting them on the doors.
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Where to go with this rusthole
I thought the two-part isocyanate activated paints were "urethanes" and different than "epoxy". My (admittedly shallow) understanding is that epoxy paints (while they are also two-part mixes) were different and not nearly as dangerous because they didn't contain isocyanates like the urethanes did. I mean, you don't want to breathe a bunch of any of them but I thought the isocyanates are the real nasty shite that can cause the allergic reaction (asthma).
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We're bringin' back the Flat Tops!
You're talking about the fuel nozzles: I would not take those out unless there is an indicated reason to do so. Inspect in place... Make sure they are in good shape (not worn or corroded). Make sure they are at the proper depth setting and haven't been messed with in the past. If they are in good shape and are at the proper mixture setting, then I would leave them installed. I wouldn't pull them just to pull them. (However.... If you do decide you need to remove them, let me know as I've got some special tools that makes it easy-peasy. )
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We're bringin' back the Flat Tops!
Nice work on the flat tops. I'm sure you already know this, but just in case... Make sure whatever cleaning method you employ on the carb bodies does not destroy the original epoxy alignment cone nubbins for the suction piston cover (the "flat" in flat-top). And make sure you keep each carb body, suction piston, and piston cover (the "flat" in flat-top) together as a matched set. They are aligned together using those formed in place epoxy cones and need to be kept together as a trio. And hopefully they haven't been mixed and matched in the past!
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Rust Advice 78 280z
Love it!!
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Rust Advice 78 280z
Or maybe frying a robot bee! Point is... It shouldn't start and stop as the wire burns back so far that it breaks the arc until it contacts again and starts. It should be a nice steady sizzle. Like frying that bee. This is making me both hungry and wanting to weld something. Is that wrong?
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Rust Advice 78 280z
Carnegie Hall is just around the corner. I'm no welder, but one anecdotal piece of advice to me that helped me.... While you're laying down a bead with a MIG, it should sound like frying bacon.
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Z31 N/A RB project
That's right... You guys got hammered in this last storm, didn't you? We got nothing other than a couple clouds. One of those rare storms that goes south of PA and is still cold enough to snow. How does that Bimmer handle in the snow? My basic curiosity question about the seam work your guy is intending to do is... "Is he welding, or is he brazing?" If he whips out a torch (either an O-A rig or a TIG setup) then he's brazing. But if he loads a spool of that silicon bronze wire onto a MIG machine, then I'm not sure what he's doing. He'll know though. In any event, pics or it didn't happen.
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So we're doing a 73 restoration project
That first short run out on the road is a blast isn't it? I remember the first time I took the 260 around the big country block after it had been sitting for so many years. Half ecstatic, and half terrified. Good work on the project so far and hope it continues to come together!
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Z31 N/A RB project
Well don't get me wrong. I'm not questioning any of the decisions about the planned process and it sounds very interesting. I just don't understand it completely. Pics of the process would be cool. (Not that you like to take pics of the work in process or anything! )
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Rust Advice 78 280z
What he said. The higher the gauge number, the thinner the metal. If you're having troubles with 16-18 ga, then 20 gauge is going to be even more difficult. Love the practice sheet. I think everyone who ever messed with a welder has one just like that! Out of curiosity... Is that MIG, or flux core?
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Dashcam Recommendations?
Thanks for the additional input guys. I will definitely update on experiences when I pull the trigger.
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Z31 N/A RB project
Haha!!
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Z31 N/A RB project
LOL! Yeah, that wire is to run through a MIG. I've never used it, but that's what it's designed for. What isn't clear to me though is exactly the application. I was aware of the process of using silicon bronze being used as a brazing filler, but I never knew it was also used in a welding operation... Especially MIG. (My rudimentary understanding being the basic difference being in brazing, you do not melt the parent materials, but in welding you do melt the parent material.) So in the few cycles of web searching that I did, I saw that silicon bronze MIG wire being used as welding filler when welding copper alloys together. I did not, however, see it being used to "weld" two steel pieces together. So in the end I really don't know what the guy doing the work on five&dime's car is really intending to do on the car, but that's not important as long as he knows. If forced to guess, I was thinking he was going to whip out the torch and braze some silicon bronze into the previously spot welded seams on the chassis and then grind them smoother. The tight seams should encourage a good wick of the brazing material to be sucked into the gap and provide the strength needed to allow reduce the thickness of the materials with the grinder. But that's all speculation on my part. For all I know, he's going to hit it with the MIG with a spool of that bronze wire in it. I'm way beyond my area of expertise.
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Z31 N/A RB project
Just a public service announcement to make sure we're all talking about the same stuff... This is silicon bronze: But THIS is silicone bronze: I'm Captain Obvious, and I approve this message.
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Dashcam Recommendations?
Yeah, I couldn't tell if they were on a cell phone or not, but whatever the deal was, I was happy they drifted backwards just a little bit when the light turned green and they let off the brake. Just enough to get them to realize they were in reverse. I wanted to hit my horn to try to get their attention, but was afraid that it would make them think the light turned green and make them stab the gas harder and quicker. So there I sat... Looking in my rear view mirror thinking that I had a couple feet I could use to back up closer to the car behind me if necessary. Anyway, it turned out to be a non-event, but just that this shite is happening day after day after day. As for the cell phone stuff, I don't think they can legislate it out of use. It's already illegal most everywhere and not much has changed. I know people who won't text while their car is actually moving, but at every red light they're checking their phone while stopped. They say "I wasn't driving, I was sitting". I think if the car is on a public road in traffic and you're sitting in the driver's seat, then you're "driving". And to support that argument... It would be illegal for a twelve year old kid with no driver's license to do that. Regardless if the car is moving at that instant or not. Why? Because he doesn't have a driver's license. Enough ranting... So nobody can pull me out of my abyss trying to come up with that movie scene? I just spent another half hour looking for it. One car is sitting still and another car comes up next to them in the other lane. There are teasing words exchanged, the light turns green, and one of the cars goes forward while the other goes backwards and slams into the car behind them? And I think you were supposed to think it was funny that the other guy did that? Like he was the "bad guy" in the movie? Is that the antagonist? Protagonist? Where's @siteunseen when you need him... He's seen all the same stupid movies I have.
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Badging a 240Z into a FairladyZ
Tenacious D would call it a Tribute.