Addicted to American Iron
Is this done by simply beading up the intake and then grinding out a more uniform "D" shape. If so, is it done with a mig welder using aluminum wire or is it a special rod with higher silicon content for hardness? What amp setting are you using to get good pentration on the heads without putting too much heat into the intake and softing up the guide / seat area? Unless you are using a square wave welder that lays lots of metal down in a very short time so too much heat isn't put in to the heads. Just curious as to process that is used and how. Does it realistically increase your velocity over the short side that much?