Banjo (burner) tuning

[lowflyingbrews]

I kill myself sometimes… :lol:

Anyway, I just got this nifty banjo setup from the LHBS, and am trying to figure out just how to “tune” the flame. I got that the air venturi should be adjusted such that flame tips should be just before turning orange. What I am wondering is- when I just run it with a little gas, the flames start at the burner and burn solid (pic 1), but when I crank up the gas the flame jumps and burns about 3/4" above the burner (pic 2). Does it put out more heat with the gas cranked up? Is it more/less efficient? Any insight would be greatly appreciated.

[dvmkurmes]

From the directions that came with my Blichmann burner (the burner is the same, looks like just the stand is different);

If the flame lifts off the nozzles, or you hear a low grumbling from the flame it is getting too much air through the damper and you will need to close it slightly. If it is yellow, there is not adequate air and you will need to increase the air flow. As you increase the gas flow via the regulator, it may be necessary to readjust the air damper. Note that optimum heating speed and efficiency can only be achieved with a properly adjusted flame