thisismatt Posted January 26, 2015 Report Share Posted January 26, 2015 Are you sure you don't want to use a thicker plate? :D 1 Quote Link to comment
Josh K. Posted January 26, 2015 Author Report Share Posted January 26, 2015 I'm a little concerned ;) Quote Link to comment
Icehouse Posted January 26, 2015 Report Share Posted January 26, 2015 Josh I am by no means a pro fabricator but I had issues with warping on the first couple headers I built. My solution was to shim the middle and pre warp it the wrong direction just slightly. Then bolt it down to keep it straight like you have done. My shim was just a piece of I think 22 gauge steel. Just something I learned building turbo stuff. I then use a big ass belt sander to make sure it was flat. 1 Quote Link to comment
Josh K. Posted January 26, 2015 Author Report Share Posted January 26, 2015 Jeff, Did you weld the tubes complete before tacking and welding to both flanges? How thick of anplate did you bolt to? "Make sure that the flange is firmly bolted to a scrap head or 1 inch base plate to prevent warpage. Yes, even 1/2 inch plate will warp." Quote Link to comment
Icehouse Posted January 26, 2015 Report Share Posted January 26, 2015 yep all tacked up before final welding. It was only the head side. The turbo side wasn't bad, I still sanded it just to make it perfect. The head side I tack welded down to the 1" thick welding table at work. Maybe it was the order I welded it or something. Let me know how yours goes. Quote Link to comment
Josh K. Posted January 26, 2015 Author Report Share Posted January 26, 2015 I meant did you completely weld out the tubes separate and then only weld to the collector and flange to finish? Just wanna be clear so I can try and mitigate any problems. Quote Link to comment
Duke Posted January 26, 2015 Report Share Posted January 26, 2015 On the couple of headers I have done, I fully welded the runners before attaching them to the flange. I didn't bolt anything down when I welded the flange up, and did have a little warping, but a few passes on the belt sander made it nice and flat again. Looking forward to seeing how this turns out. I love all the custom work that is going into this car. 2 Quote Link to comment
Josh K. Posted January 27, 2015 Author Report Share Posted January 27, 2015 Weld fixture done. Tapped a 1/8"-27 NPT port for the back purge feed. 3 Quote Link to comment
datsunfreak Posted January 27, 2015 Report Share Posted January 27, 2015 First icehouse then duke? This thread is bringing all the old lurkers out... :rofl: That is a very nice jig. :thumbup: 3 Quote Link to comment
Josh K. Posted January 27, 2015 Author Report Share Posted January 27, 2015 Thanks! Quote Link to comment
Josh K. Posted January 27, 2015 Author Report Share Posted January 27, 2015 On the couple of headers I have done, I fully welded the runners before attaching them to the flange. I didn't bolt anything down when I welded the flange up, and did have a little warping, but a few passes on the belt sander made it nice and flat again. Looking forward to seeing how this turns out. I love all the custom work that is going into this car. Thanks Duke. Glad people are still viewing all my updates. Been a long time but its been a fun journey. One step at a time ;) Quote Link to comment
Josh K. Posted February 7, 2015 Author Report Share Posted February 7, 2015 I've never tig'd stainless in my life. Barely tig'd any steel...... Didn't really get big beads but who gives a shit. Looks better in person. Gotta finish welding out the collector and then start on the tubes. 5 Quote Link to comment
solo Posted February 7, 2015 Report Share Posted February 7, 2015 So what happened with the water pump pulley? Quote Link to comment
Josh K. Posted February 7, 2015 Author Report Share Posted February 7, 2015 Its all programmed and ready to make. My coworker is gonna bang it out for me. Its low priority so I'm not rushing him. Quote Link to comment
mklotz70 Posted February 7, 2015 Report Share Posted February 7, 2015 The welds look really nice!! ......never tig'd before......you're killin' me!!! 2 Quote Link to comment
q-tip Posted February 7, 2015 Report Share Posted February 7, 2015 I've never tig'd stainless before, but here is these really nice tig welds... Looks good man, keep it up! 2 Quote Link to comment
Josh K. Posted February 8, 2015 Author Report Share Posted February 8, 2015 More progress. Collector is done and flat sanded. One tube welded and tacked in place...... Not the prettiest but I can't complain :) Quote Link to comment
SR20DETdatsun510 Posted February 8, 2015 Report Share Posted February 8, 2015 I'm not a welder but i thought you were just supposed to tack the piping to get them in place and fitted first? Quote Link to comment
Josh K. Posted February 8, 2015 Author Report Share Posted February 8, 2015 Nope. If you do that you have every joint you weld pulling in a different direction. That will leave you with a warped ass manifold. You weld out the collector. Flat sand it. Weld out the tubes separate. Then weld them one by one to the flanges. Quote Link to comment
thisismatt Posted February 8, 2015 Report Share Posted February 8, 2015 I'm not a welder but i thought you were just supposed to tack the piping to get them in place and fitted first? He did that already :) Kind of hard to weld all the way around the tubes and the collector when it's all tacked up, though. Quote Link to comment
datsunfreak Posted February 8, 2015 Report Share Posted February 8, 2015 Kind of hard to weld all the way around the tubes and the collector when it's all tacked up, though. If it was easy, everyone would do it. B) 1 Quote Link to comment
SR20DETdatsun510 Posted February 9, 2015 Report Share Posted February 9, 2015 But you do tach the tubes first then weld the joints while off the manifold right? I thought you welded it while in place. That it what i meant. Quote Link to comment
Josh K. Posted February 9, 2015 Author Report Share Posted February 9, 2015 Yes. Everything was tacked. Cut each tube free from the flange and collector complete and welded it out separate then tacked to the collector and flange. Quote Link to comment
solo Posted February 18, 2015 Report Share Posted February 18, 2015 Its all programmed and ready to make. My coworker is gonna bang it out for me. Its low priority so I'm not rushing him. Well I'm interested in one so let me know if you plan on selling or sharing your program. My homie can machine it also. Thanks Quote Link to comment
Josh K. Posted March 1, 2015 Author Report Share Posted March 1, 2015 Well I'm interested in one so let me know if you plan on selling or sharing your program. My homie can machine it also. Thanks I'll let you know. What's your timeline for needing one? Haven't done much lately. Family got a nasty bug we've been fighting. I did find something out. When I was tig'ing the collector the tungsten was acting funny and it just wasn't welding right. Well I come to find out the argon bottle I borrowed for back purge was a argon/carbon dioxide mix! Doh! My buddy didn't look when he grabbed it and I didn't think to check. Welds look OK but explains why they didn't stack well. Oh well. Moving on.... Still got a lot of welding to do. Hopefully finish it this week after work.. Quote Link to comment
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