Got bored last night and got my new back purging setup so I went ahead and welded the pipes up. 321 is hard (especially used, despite how much you clean it) Titanium isn't any easier (only my second time welding it!)
Results are decent cosmetically (maybe a bit too much heat), but full depth welds and back purged so they should be full strength. Back purging gives an equally smooth interior weld, which I smoothed out a little more with my bore sanding air tool attachments.
Just waiting on parts from my other big project (custom flywheels for the 996 gearbox swap) to put the engine back in now.
