Nope, I'm looking at them right now and they're out putting 4 mj/t. Remember that they scale their output based on the power draw of machines they are connected to, so that may be why you were only getting 2 mj/t.Last time I checked they were only 2mj not 4mj and work rather well but the hobbyist steam engine is more efficient even thou it is 1.6mj.
Yeah, that's the one I'm talking about. I'm pretty sure the wiki is outdated.Are we thinking of the right engine? Thermal expansion steam engine.