Hex23
Well-Known Member
Also, one lesson learned the hard way: when calculating your strike temperature, do it on the volume of the mash-tun. I merrily went on my way the way I always have for BIAB and entered the full volume of water in my handy app... needless to say, dropping 24#'s of grain into 8 gallons of water, I missed my dough-in temperature by ~10°! Fortunately when I started to recirculate, the temperature came back up quickly and stayed rock steady throughout the entire mash using the offsets above.
M
I was thinking about this recently, and (theoretically) I'm not sure either extreme would be ideal. In the case where you consider your strike volume to be the volume in the MT, you might get the MT to hit the initial rest temp during the 10 minute dough in, but as soon as you start re-circulating, the the temp would go up because you've still got strike temperature water in the BK. The system would eventually stabilize, but not sure how quickly. OTOH, during the dough in process you've got the heat turned off (else it would run away), so the liquor in the BK is cooling. All of this depends on the external temp, so it's a little complicated. I suspect this is something that would take trial and error to really hit the initial rest temp. Personally, I'd rather consider the full volume as the basis. That way, at least your not potentially overshooting the temp and denaturing enzymes.