I was making a 27 gallon test recipe using 72% steam rolled corn, 18% flaked rye and 10% malt. This was my second attempt, but with a different outcome. First attempt didn't sour during fermentation and seemed fine after some light aging.
When I made the mash I did not utilize any wort chillers, so, it took several hours to cool from 200F to 160F, then to 155F. It was late and I was tired, so I decided to add the malt at around 155F instead of 152F and went to bed to let the wort finish cooling. When I checked on the mash the next afternoon (12hrs later), it was still arount 120F and it appeared to slready be fermenting on the top cooler layer. I hooked up my improvised wort chiller running with a glycol solution to bring the mash down to 75F. This took about 2 hrs and then i pitched my yeast. When I was pitching the yeast I had noticed my wort had soured. It appears that it is fementing fine, but I am wondering if I should be concerned even bother distilling it.