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Godholio posted:I've never touched a welder. That looks like I did it. Doubt it. Anyone with half a brain and even a shred of decency would have busted out the grinder, shaved off the warts and tried again. I'm a pro booger-welder and I thought my ~custom exhaust~ was ugly, but god drat this is horrifying. I'm having a hell of a time trying to figure out what exactly was wrong, this welding chart doesn't cover it:  also GIS'd "bad weld" and was not disappointed...it's another exhaust 
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Apr 26, 2013 13:46
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Root Bear posted:A 99 Ford Taurus came in yesterday for an inspection, and according to the customer "It just started shaking and clunks real bad" Wait wait wait wait. Did somebody put the lug nuts on OVER the plastic hub cap? 
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Apr 26, 2013 13:52
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I'm going to have to climb under my truck now to snap some pictures of the exhaust now. The one time I let a mechanic touch it, and everything ended up covered in those terrible spattery "welds." I've been putting off pulling out an angle grinder mostly because I don't have 240v in my shop and so I can't weld it back together.
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Apr 26, 2013 13:53
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Sir Cornelius posted:It's what's called a perimeter-frame. Well, I guess you could call it a space-frame. Thanks for bringing up that pedantic discussion from 8 pages ago.
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Apr 26, 2013 14:28
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You don't know anyone who has a "babbys first MIG welder" that runs on 110? I keep a lincoln procore/100 around that runs on 110 simply because it means I can grab it with one hand and sling it in the back of the truck when a friend wants me to weld something that won't move, instead of trying to figure out how to get it near my 220 welder and long-rear end extension cord. With proper prep and a little skill you can weld up to at least 1/4" plate with a 100 to 130 amp welder running fluxcore, it burns a little hotter than MIG given the same current and preheat/beveling the poo poo out of the work will get you the rest of the way. I see them on CL for like 200 bucks all the time, I bought mine off a friend for $100 when he replaced it with a miller 211 iirc.
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Apr 26, 2013 14:29
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Boat posted:Wait wait wait wait. Did somebody put the lug nuts on OVER the plastic hub cap?
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Apr 26, 2013 14:44
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Nubile Hillock posted:I'm having a hell of a time trying to figure out what exactly was wrong, this welding chart doesn't cover it: The former weld was too cold and had improper (i.e.: no) surface prep. The GISed image appears to have the same problem but was done FCAW or GMAW (probably GMAW) with entirely too much stick-out and way too fast of a wire speed. I am not a good welder, but I at least recognize that and have done the research to figure out how to correct my problems. Turns out basic break/fix welding for your basic automotive repair and exhaust stuff is about 30% surface prep, 60% having the correct machine settings and only 10% technique (as in, you can learn about as much as I know in 30 minutes on some scrap steel). And I mean all of this in the context of getting acceptable results that work and that you don't have to grind right back off again, not crazy rear end artwork-level poo poo like what UF does.
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Apr 26, 2013 15:01
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I've only used a MIG welder. I've never seen anything like that. MIG is easy, it's like a hot glue gun for metal.
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Apr 26, 2013 15:12
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thylacine posted:I've only used a MIG welder. I've never seen anything like that. MIG is easy, it's like a hot glue gun for metal. That GISed image is MIG (GMAW). See all the "whiskers" or wire that didn't melt? Yeah....machine settings. And I agree....GMAW (MIG) and FCAW (flux core wire without gas using the same type of machine) are pretty simple if you're paying just a little bit of attention. It's much easier than stick welding for me. I haven't gotten my hangs on a TIG welder to try yet, but I'd really like to see how much of a mess I make of that process.
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Apr 26, 2013 16:03
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I have virtually no welding experience, but I was told that welding on galvanized metal was a great way to ruin your health. Are exhausts galvanized?
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Apr 26, 2013 16:08
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Sometimes.
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Apr 26, 2013 17:33
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That looks like fluxcore not MIG to me, I think I see the hole in the end of the wire from the flux core in a few places and it looks like there's brown flux smoke everywhere on the right side. Also, CommieGIR, move over   1/4-28 ujoint strap bolt that broke off a thread or two down into the yoke ear came right out. kastein fucked around with this message at 17:45 on Apr 26, 2013 |
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Apr 26, 2013 17:41
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Mercury Ballistic posted:I have virtually no welding experience, but I was told that welding on galvanized metal was a great way to ruin your health. Are exhausts galvanized? You just have to grind the galvanized part off, or drink a lot of milk beforehand  .
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Apr 26, 2013 17:42
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Mercury Ballistic posted:I have virtually no welding experience, but I was told that welding on galvanized metal was a great way to ruin your health. Are exhausts galvanized? Metal shakes aren't a loving joke.
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Apr 26, 2013 19:18
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kastein posted:That looks like fluxcore not MIG to me, I think I see the hole in the end of the wire from the flux core in a few places and it looks like there's brown flux smoke everywhere on the right side. I gotta take out two broken exhaust studs that broke flush this weekend, wish me luck.
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Apr 26, 2013 19:45
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That sounds... not fun, any chance you can just use a dremel to make a flat blade screwdriver slot in them, torch the motherfuck out of the head surrounding the stub, and then spin them out?
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Apr 26, 2013 20:04
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Didn't need those anyway.
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Apr 26, 2013 20:15
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The best part is when he still counter steers.
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Apr 26, 2013 20:20
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Previa_fun posted:The best part is when he still counter steers. ...He drove the wheels off it...
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Apr 26, 2013 20:21
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edit nm
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Apr 26, 2013 20:23
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I can't tell if he instantly starts sliding or if the Aero actually keeps the front end up.
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Apr 26, 2013 20:31
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BoostCreep posted:Didn't need those anyway. That doesn't even look real... I wouldn't even know how to react at that point other than just laugh and accept my fate.
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Apr 26, 2013 20:34
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Carteret posted:I can't tell if he instantly starts sliding or if the Aero actually keeps the front end up. Nah the front wing sits a bit higher than the floor, he's running along the wooden plank they have on the bottom of the car. I did our team's FSAE uprights this year and that gif still terrifies me! 
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Apr 26, 2013 20:46
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Carteret posted:I can't tell if he instantly starts sliding or if the Aero actually keeps the front end up. This is not how aero works.
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Apr 26, 2013 21:03
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amenenema posted:This is not how aero works. Unless you're in a hydrofoil!
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Apr 26, 2013 21:22
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Carteret posted:I can't tell if he instantly starts sliding or if the Aero actually keeps the front end up. F1 aero generates downforce, if anything it'd slam down harder.
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Apr 26, 2013 22:21
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BoostCreep posted:Didn't need those anyway. I cannot put together what the hell happened. He hit something? Looks like both steers just blew simultaneously...
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Apr 27, 2013 02:25
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PainterofCrap posted:I cannot put together what the hell happened. He hit something? Looks like both steers just blew simultaneously... Major design flaw if you ask me... and I thought they were supposed to be tethered so full separation like that couldn't even happen. I remember that race pretty vividly and my reaction was just *jaw drop*.
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Apr 27, 2013 02:42
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He hit the brakes at high speed and the stress caused the uprights to fail. Not sure if they ever said what the issue with them was.
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Apr 27, 2013 02:48
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Friend of mine is fixing this:    Who wants to guess what kind of a car?
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Apr 27, 2013 02:55
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RapeWhistle posted:Major design flaw if you ask me... and I thought they were supposed to be tethered so full separation like that couldn't even happen. I remember that race pretty vividly and my reaction was just *jaw drop*. Could you explain what you mean by tethered? I don't really see how a material defect leading to full failure of the suspension arms is something that is easily preventable.
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Apr 27, 2013 02:58
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If you look at most modern F1 crashes, you will see that the wheels will separate but there will be a tether that ties them to the car so they don't fly into a crowd and kill a few dozen people. As for what happened with that car: Adrian Newey. Adrian Newey happened.
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Apr 27, 2013 03:40
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jamal posted:Who wants to guess what kind of a car? Hold my beers, guys. I got this. It's always a Fiero.
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Apr 27, 2013 03:55
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Crustashio posted:He hit the brakes at high speed and the stress caused the uprights to fail. Not sure if they ever said what the issue with them was. I think I remember hearing that they were testing a new upright design in a practice session, which it seems wasn't quite up to the task. Edit: The reason the wheel tethers failed is because the tethers are (or were, I think they changed that since then) attached to the uprights. MrChips fucked around with this message at 04:18 on Apr 27, 2013 |
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Apr 27, 2013 04:16
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jamal posted:Friend of mine is fixing this: If by fixing you mean "replacing the whole thing" then OK, if you actually mean there's something useful left in what was that engine then quote:Who wants to guess what kind of a car? Hmm, DOHC V6 that appears to be designed for performance from the factory and gets abused....GTR? I'm certain it's something Japanese and probably AWD.
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Apr 27, 2013 04:53
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jamal posted:Friend of mine is fixing this: That looks like a VQ35HR; VQ35DE rods are shaped differently around the big end. Then again, the VQ38DETT also has the same shaped rods. BlackMK4 fucked around with this message at 05:23 on Apr 27, 2013 |
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Apr 27, 2013 05:14
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wolrah posted:If by fixing you mean "replacing the whole thing" then OK, if you actually mean there's something useful left in what was that engine then Yeah, basically new everything:  And it is a GTR.
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Apr 27, 2013 05:33
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I know how it all goes money wise, but I still can't ever imagine loving with an engine that costs so much to rebuild. I'll stick to my lovely little bike engines where I can get a used motor with 10k on it for $1500.
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Apr 27, 2013 05:49
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Crustashio posted:Not sure if they ever said what the issue with them was. 'Something broke, it happens' https://www.youtube.com/watch?v=hgRNYuFewS4
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Apr 27, 2013 05:54
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BlackMK4 posted:I know how it all goes money wise, but I still can't ever imagine loving with an engine that costs so much to rebuild. I'll stick to my lovely little bike engines where I can get a used motor with 10k on it for $1500. I'd rather rebuild the engine than the transmission. I don't think a Saturn V costs as much as a GTR transmission.
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Apr 27, 2013 16:31
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