|
Post by 190mech on Apr 30, 2020 19:23:51 GMT -5
What about using the propane torch,flux and 50/50 solder to seal the pin holes?Yeah,I know welding is difficult after solder application,but if its structurally sound,no further welding should be needed..
|
|
|
Post by 90GTVert on May 2, 2020 11:47:50 GMT -5
I think I'm close to getting the tank sealed. Only a small amount of pinholes left. Just takes forever. I try to let it cool 5 minutes or so after welding. Don't want to pump it up and spray it right after that much heat is applied for fear of making it really brittle. So wait. Pump it up and spray it. Pick 1 or 2 spots. Clean it off. Forget where at least 1 spot was. Spray and clean again. Weld. Repeat 400,000,000 times. Not actually that many pinholes, but I still haven't figured out the trick to getting them first try, although things have improved from when I first started.
I had one weird spot. The weld puddle would form on either side of a crack, but would leave a gap. Even when I got it to join, there'd be a leak right in the center. Tried grinding it and filing out the groove and making sure it was really clean. Eventually I formed a big puddle on the highest voltage setting and got it to cross over and meld.
The couple of times that I've built something and had to make it seal, I've really appreciated the ease of just sticking things together after.
|
|
|
Post by Kenho21 on May 2, 2020 12:00:08 GMT -5
I think I'm close to getting the tank sealed. Only a small amount of pinholes left. Just takes forever. I try to let it cool 5 minutes or so after welding. Don't want to pump it up and spray it right after that much heat is applied for fear of making it really brittle. So wait. Pump it up and spray it. Pick 1 or 2 spots. Clean it off. Forget where at least 1 spot was. Spray and clean again. Weld. Repeat 400,000,000 times. Not actually that many pinholes, but I still haven't figured out the trick to getting them first try, although things have improved from when I first started. I had one weird spot. The weld puddle would form on either side of a crack, but would leave a gap. Even when I got it to join, there'd be a leak right in the center. Tried grinding it and filing out the groove and making sure it was really clean. Eventually I formed a big puddle on the highest voltage setting and got it to cross over and meld. The couple of times that I've built something and had to make it seal, I've really appreciated the ease of just sticking things together after. This is when you need an instructional video with the equivalent detailed specificity and helpfulness of your own 😂. Surprised there’s not something that addresses how to fix specific issues like you’re experiencing out there.
|
|
|
Post by 190mech on May 2, 2020 13:43:38 GMT -5
Flux core isn't the best choice for building that project..Oxy Acetylene(even brazing) is the best,followed by TIG,then MIG..We have to repair fuel tanks(aluminum),some can be welded,but lots cant,,so there is a 2 part fuel proof rubberized sealant that does a great job..I can send you some as we have plenty of "out of date" stuff the medical helicopter shop give us to get rid of it..
|
|
|
Post by 90GTVert on May 2, 2020 14:52:46 GMT -5
This is when you need an instructional video with the equivalent detailed specificity and helpfulness of your own 😂. Surprised there’s not something that addresses how to fix specific issues like you’re experiencing out there. Step 1 : Don't be an idiot. Put that flux core rig away.
|
|
|
Post by Kenho21 on May 2, 2020 14:58:00 GMT -5
This is when you need an instructional video with the equivalent detailed specificity and helpfulness of your own 😂. Surprised there’s not something that addresses how to fix specific issues like you’re experiencing out there. Step 1 : Don't be an idiot. Put that flux core rig away. If you’re an idiot when it comes to tuning, then I’m a potato.
|
|
|
Post by 90GTVert on May 2, 2020 14:58:23 GMT -5
Flux core isn't the best choice for building that project..Oxy Acetylene(even brazing) is the best,followed by TIG,then MIG..We have to repair fuel tanks(aluminum),some can be welded,but lots cant,,so there is a 2 part fuel proof rubberized sealant that does a great job..I can send you some as we have plenty of "out of date" stuff the medical helicopter shop give us to get rid of it.. Thanks for the offer. I hope it doesn't get to that point since I am close. The goal is to seal it mechanically... with exasperating ugly welds. Then I've got a fresh can of POR-15 Fuel Tank Sealer here for a little added insurance when it's done.
|
|
|
Post by 90GTVert on May 2, 2020 15:02:55 GMT -5
Step 1 : Don't be an idiot. Put that flux core rig away. If you’re an idiot when it comes to tuning, then I’m a potato. I do a lot of stuff the hard way. I should have learned MIG or TIG or how to use an oxy/ace torch with all the crap I get myself into. Nope. I prefer to pretend that flux core is the only type of joining that exists aside from epoxy and bolts. It works fine for most things that I do. Just don't ask me to build a gas tank or a 2T pipe. You should have seen me filling every hole in the engine bay of my Mustang with an old flux core welder that had just hi/lo voltage settings. Eventually it looked really good, but it took me an incredibly long time. Made the gas tanks look like small jobs.
|
|
|
Post by Kenho21 on May 2, 2020 18:23:54 GMT -5
If you’re an idiot when it comes to tuning, then I’m a potato. I do a lot of stuff the hard way. I should have learned MIG or TIG or how to use an oxy/ace torch with all the crap I get myself into. Nope. I prefer to pretend that flux core is the only type of joining that exists aside from epoxy and bolts. It works fine for most things that I do. Just don't ask me to build a gas tank or a 2T pipe. You should have seen me filling every hole in the engine bay of my Mustang with an old flux core welder that had just hi/lo voltage settings. Eventually it looked really good, but it took me an incredibly long time. Made the gas tanks look like small jobs. That ended up looking really great. Nice work. Your words make me feel a little better about my project and the pace I work at. I take an incredibly long time, partially because I'm detail oriented and partially because I just take a long time to do things I've never done before and a large majority of the work in my build so far has been my first time doing many things. I've spent probably a sum of tens of hours cleaning, polishing, and restoring to the best of my ability a TON of parts for my build because this scoot was in pretty rough shape. That being said, I still feel like I work very slowly when I see people like Ryan disassemble and reassemble an entire bike they've never laid hands on in a few weeks or so and achieve a result that I can only dream of with my current skill level and set of tools. I suppose in the end all that matters is we enjoy ourselves and end up with a result that's satisfactory for ourselves. Your stuff (vids, bikes, and other projects) always look great and I learn a lot from watching. I wish I had more constructive input sometimes though.
|
|
|
Post by 90GTVert on May 3, 2020 14:29:37 GMT -5
I got so mad at the gas tank that I held it under water and tried to drown it! Either that or I finally got everything that I could find with soapy water spray sealed and decided to be totally sure it doesn't leak by submerging it while pumped up to 10psi. The only leaks are the NPT barbs and the pressure test connection. Already knew those leaked. I wasn't sure this day would ever come, but I'm pretty damn happy about it. Once again it looks like persistence and willingness to take abuse got it done when my methods were out of whack. EDIT : Oh yeah, I also checked the capacity. It holds 1.16 US gal. I then checked how much I could drain out of it as it would be setup on the bike. I drained out 1.15 gal. I was thinking the pickup design may be a little less efficient than that. Especially since I got near the edge, but was nervous to cut in too close when I placed it.
|
|
|
Post by aeroxbud on May 3, 2020 15:50:52 GMT -5
That's great. It will soon be doing wheelies 😁
|
|
|
Post by 90GTVert on May 3, 2020 18:16:10 GMT -5
That's great. It will soon be doing wheelies 😁 Well, it took me 3 weeks to finish the gas tank construction. I'd estimate wheelies in October ...of 2023.
|
|
|
Post by aeroxbud on May 3, 2020 18:35:16 GMT -5
All you have to do now is a couple of bolts for the engine. Connect a few wires. Then do a burn out. I know it's that easy. I watch YouTube!
|
|
|
Post by 90GTVert on May 5, 2020 16:46:39 GMT -5
If you wanna watch me struggle with a gas tank on video : youtu.be/11T0IHhXvcYI was just looking around at oil coolers. This engine is supposed to require one if you want it to live. Seems like most of the generic Chinese stuff is about the same. I don't like the billet ones. They look like junk made for the folks that just want something pretty to me. Looked at Jegs for oil and transmission coolers, but most of that stuff is kinda big or uses big lines. Made the mistake of looking for motorcycle oil coolers. Some stuff in the moto-market is nuts. $250 and up for most of them. I'll keep looking. Prob end up with generic Chinese in the end.
|
|
|
Post by Kenho21 on May 5, 2020 18:10:35 GMT -5
There’s a comment or two that actually make a lot of sense this time. Haha
|
|