Thought this might be worth sharing. I was ready to retire the #8 today. The #19e arrived, and the v drop out of the box was .15-.2v on a 1.8ohm test coil, using a fresh efest 18350.
My #8 after getting all the contacts to brass, all the mods except replacing the spring, was consistently at a drop of .7v with the same setup, but lately I've been testing lower and lower ohm coils, and noticed I was starting to get the hot button. As of today the drop was up to a ridiculous 1.2v, and I knew it couldn't be just the spring.
Long story a little shorter, it's the adhesive between the switch housing and the tube causing the ever increasing drop and the hot button. I'm guessing with lower ohm coils it's either expanding or migrating, making the connection worse and worse. I boiled just the tube and switch housing for about 5 minutes, and finally got it apart. Cleaned it up and now the drop is less than .3v on the original 1.8ohm test coil, not quite what the #19e can do out of the box, but the biggest improvement yet.
So I'd highly recommend clearing the threads between the tube and switch housing on the #8, before bothering with any other modifications.
My #8 after getting all the contacts to brass, all the mods except replacing the spring, was consistently at a drop of .7v with the same setup, but lately I've been testing lower and lower ohm coils, and noticed I was starting to get the hot button. As of today the drop was up to a ridiculous 1.2v, and I knew it couldn't be just the spring.
Long story a little shorter, it's the adhesive between the switch housing and the tube causing the ever increasing drop and the hot button. I'm guessing with lower ohm coils it's either expanding or migrating, making the connection worse and worse. I boiled just the tube and switch housing for about 5 minutes, and finally got it apart. Cleaned it up and now the drop is less than .3v on the original 1.8ohm test coil, not quite what the #19e can do out of the box, but the biggest improvement yet.
So I'd highly recommend clearing the threads between the tube and switch housing on the #8, before bothering with any other modifications.