Ok, endermen hunting it is[DOUBLEPOST=1387469445][/DOUBLEPOST]How much energy would a magma dynamo produce with 1 bucket (1000mb) of lava? (I was considering using a magma crucible to melt down netherrack which costs 120,000 RF, so I would like to know if this would work or not)
By default, you get 180,000 RF out of a bucket of lava in a magmatic dynamo. So yes, you make a profit off of melting down netherrack. This is intended
Currently through my tests, one magma crucible can supply 11 Magma dynamos at once with a slight surplus of lava. So that provides enough power to run your magma crucible at full speed + 40 RF/t extra while your dynamos are filling up with lava, then once they're full, your magma crucible will only run part of the time, and thus you'll get much more surplus
And as a note, to burn Cobble or stone, that takes 200,000 RF producing a 20,000 loss.