Originally Posted by zman
Sounds interesting. I have never done a full boil with extract so please correct me if I am wrong. I am assuming that I just calculate what I am going to boil off in a 90min boil in my 42qt kettle (1.5gal) so I bring 6.5g to a boil, remove from flame, add my fermentables, bring it back to a boil and hop accordingly?
It is slightly less since the extract adds some significant volume. There is probably a way to calculate, but I choose just to maintain my ignorance and boil for a few minutes before I start the hopping. I do not do late extract additions since I like to imitate my AG process wherever possible and I dont worry about color (which is the other plus of adding extract late, you get a lighter colored beer).
Otherwise, you are correct.