Thinwall aluminium pipe

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So I had a shot at building up an inlet pipe for my mr2 today:Not perfect, but it will do the job.I found that if I had enough current to get a decent looking weld:That I would have 'blow through' on the inside of the pipe.If I backed off the current until I didn't get blow through, the weld was obviously cold:Is there a happy medium I was dancing around?  Or is it accepted that you have to clean up the back of the weld on thin aluminium?On the plus side, this is the first thing I've actually built with my TIG Last edited by Ben Wilson; 02-03-2007 at 06:33 AM.
Reply:You can have it come through a little bit. I recently built a blower hat and the same thing happened. With thin material it's almost a given it will fully penetrate the back.John -  fabricator extraordinaire, car nut!-  bleeding Miller blue! http://www.weldfabzone.com
Reply:If you practice at it then you can do thinwall stuff without burn-thru..The runners on the Intake I built was 2 piece .090 or so and I welded them without burn-thru whatsoever..there are times where you just want it "stuck" together..The pic that you showed with the heat down looks just right for what your doing..Theres no way I'd want to get a die grinder in turbo pipes to clean out the burn-thru..So just dont do it and everythings fine......zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.