So did my 2nd BIAB today. The first BIAB, I hit all of my numbers perfectly at 75% efficiency.
Today, I was much lower. Here is the recipe:
8 gals, 155 dough in, 150 mash temp, 60 mins
60 min boil
.75 Victory Malt
.25 Crystal 90
4.5 White Wheat
60 mins 10z Hallertau
5 mins 1oz Hallertau
My pre-boil reading was 1.030-1.033, which should be about 65-70% efficiency. My OG before adding the yeast was 1.042. Beersmith estimated an OG of 1.051, and austin homebrew recipe suggested a 1.052 OG.
So obviously, my OG is lower. What effect will this have on the final beer? Every beer I've made so far has been with 1 or 2 pts, so this is new ground for me. If my FG still ends up at the estimated 1.011, I'll end up with a 4% abv beer, which is just fine, I don't mind something closer to a session. But I imagine the yeast will attenuate lower than estimated (because lower og). I'm using White Labs Hefeweizen Ale 300 w/ a 1L starter. If it attenuated the full 75%, I will end at 1.003 FG. 5% abv.
How will this super low FG effect the taste of the beer? Am I in for a much hoppier, waterier beer than I was anticipating? What should I expect if the beer finishes at the estimated FG, aside from lower ABV?
As far as my effiency goes, I've already figured out some changes that should help, between insulating the pot better to preserve temps, mixing the grain more often, asking for a finer mill when ordering grain, as well as a 1 gallon sparge. I'm hoping these improvements will get me closer to the "magical" 80%.