Would love to know how he avoids distortion when welding cases etc together. I note he has steel bars in the camshaft bearings, but that won’t help much. You weld it all up, remove the ‘jig’ and it’ll still be like a banana. As I found out a long time ago. So pre-heat to a high temp before welding? Then how do you maintain temp whilst TIG welding, and how do you hold things in place? Can’t use steel fastenings because of differential expansion. When making double-skinned marine manifolds I used to pre-bend the material so they’d be (almost) straight after welding, but you can’t do that here. And here 'almost' straight is not an option. And a pressed-up six cyl crank? He has way more patience than I. I wouldn’t even attempt it – a pressed-up single cyl is enough for me. And then there’s the small matter of double the power transmitted through crankcases and a crankshaft that are now weaker than the original. The guy is incredible.
