I mashed my first batch in my new 120qt. mash tun and had problems getting a consistant temp. throughout the mash. I must have stirred the mash for 5 minutes but I kept reading a 4 degree difference from one end of the cooler to the other. I doubt that it was a due to a thick mash as I was no-sparging so I had roughly 2/3 of my total water volume in the tun to start. I ended up having to add boiling water because I missed my mash target temp. pretty badly and this helped to even out the temp. eventually. I’m just wondering if anyone else has the same problems when they use larger coolers to mash? My concern is that I’m going to have a heck of a time hitting my mash temp. if one side of the tun is at 146F and the other is at 150F early on in the mash.
Second, how bad of a hit to efficiency do you assume to take when you no sparge? I did a Baltic Porter which was supposed to end up in the 1.080 range at 60% eff. (good for me unfortunately) and I missed that by quite a bit. I don’t really all that much about great eff. but I want to hit my OG for proper pitching rates, especially, with a big lager like this.