I have been able to pull off full (5 gal) boils doing B.I.A.B. using just half extract but to get a good rolling boil I've done best splitting between a large and small burner that are front to back (instead of side by side). Heavy Duty Aluminum foil is your friend, I go under the burners and around the pot (doubt i could find the tread again but thanks to the people that made it). It usually takes 45 min or so to get going, and i generally leave the large burner on and use the small to control the boil intensity.
Primaries : Oxyclean
Secondary : EdWort's Apfelwein w/ Kiwi (05/11)
Keg Tapped : Dog Park Wheat
Keg Condition: Oxyclean
Bottle : Butchered IPA (12/10);EdWort's Apfelwein (04/11)
Last edited by ShaggyDogBrewing; 06-02-2011 at 03:32 PM.
Reason: clarified full boil as being 5 gal