i had no problems welding my fuel tank the other week to replace the fuel pickup and pump for a RB one, just flush the tank with water twice and throw a big match in to burn off any fumes. it was ok to weld and grind, i had a real long think about making a internal surge tank, problem was i cant find a internal low pressure pump only could find external pumps,
i was thinking if it was a cylinder(surge tank) welded to the base of the tank with no lid and a internal low pump filling the cylinder and another internal high pump. i was thinking of this idea for a few reasons
1, that would keep buzzing noise down
2, with no lid on cylinder any over flow would just trickle down back to tank and weld,
3, less lines running all over the place
down side would be i'd have to cut a really big hole to fit the whole unit into the tank
like this
