Whiskey&Revelry

Sixdegrees, Check in to this company: http://www.temperancedistilling.com/

Haha yes, good advice. Thought that was kind of a given

Easiest first thing typically is to add a Nitrogen nutrient and see if it corrects

This is the best solution.

Max- I am familiar with the information you are referring to and am very familiar with grain-flour mashes. That was simply meant to put the viscosity of such mashes in to perspective... They do not actually discharge flour mash stillage down their drains. However if you can find a municipal sewage system that will let you put such mash down the drain, then power to you!

'Theoretical maximum' as total ethanol potential calculated by mass.. 13lbs of pure glucose is 1gal pure EtOH. Of course, fermentation isn't straight material balance, so we tend to see you only actually get about half of that(~26lbs.) With basic whiskey yeast in a single malt mash(2:1 lb grain/gal water ratio, no added enzymes, grist size of about <600um, and 4 step mashing protocol), 1gal 100% EtOH per ~30lbs is pretty standard. That's right on with Cutty's numbers.

Find out the starch content of each of the grains you would be using. Then you need to determine your conversion success. This depends on a variety of things like grist size, enzyme activity, mashing technique, etc.. Because of this, it's almost impossible to give a number. At theoretical maximum(which you'll never achieve), assuming the starch % above, you would get in the neighborhood of 1gal 95% EtOH per 13lbs.

Do you have WHITE corn by chance?