Compression Ignition Addict
Join Date: May 2013
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Impressive for a first go!
I once worked for a dude at a fab shop and he is the one who taught me how to tig.
One of the things he taught me on aluminum was to wait untill the puddle was like a mirror then add filler and move on.
Another aluminum trick he showed me for thicker material was to use a oxygen-acetylene torch, without the oxygen on and cover the weld area with a bit of soot. Once there was a layer of soot, heat the area up with the torches (using oxygen now) and when the soot disappears, the aluminum is hot enough to start welding.
I am not a welder, so take these with a grain of salt.
One thing I would recomend though is to get lots of practice before welding an intake. Keep in mind that it is a pressure vessel!
Hope these help.