This Thread is all about Maths behind different Objects, and should answer Questions like "How many Railcraft Coke Ovens do I need for a Boiler in GT5?" (if someone would please post an answer to that, that would be nice). This Thread will be pinned on the GT Forum Board to receive the needed Attention.
I will list all the things, which are actual answers, below:
Small Boiler Math, More Small Boiler Stuff
Large Boiler Output
You can also ask Questions so that people can answer them, so that I can link their Answers.