Originally Posted by: cletus 2)Do you need to add additional enzymes, such as alpha and gluco, to help the conversion or are the malted grains enough for the conversion?
As Scotty pointed out, a good recipe should have this all worked out. If you're coming up with your own grain bill, you'll have to do a little bit of math to determine your average diastatic power (DP). I haven't come across any "standard" average DP, but I've found several recommendations that it should be somewhere in the neighborhood of 40 - 50 degrees Lintner (°L).
[COLOR="#FF0000"]Maybe some of our experienced AG members can comment on this??[/COLOR] You can think of the DP as the enzymatic power of a malt. A malt with a DP around 35 °L can convert itself. So you'll need at least another 35 °L per pound of unmalted grain in your grain bill. The 40 - 50 °L mentioned above accounts for the "fudge factor."
So figure out how much unmalted grain you want to use (say, 10 pounds), and the malt you want to use (say American 2 Row Pale Malt:
DP: 140 °L). Now you can figure out how much malt you need in your grain bill. Assume that you want an average DP that's in at the top of the recommended range (50 °L).
Unmalted grain: 10 lbs x 50 = 500
Malted grain: 500/(140 - 50) = 5.5 lbs
So if you use about 5.5 lbs of 2 Row Pale Malt (DP 140 °L) and 10 pounds of unmalted grain, you'll end up with an average DP of around 50 °L.
Originally Posted by: cletus 2)3) Does a malted grain have the necessary enzymes to create a 'distillable' mash? (Enough ABV to extract the alcohol for a drinkable spirit?)
I'm not sure if I understand the question either. Are you asking if the malt has the different types of enzymes needed to covert the starches to glucose? That is, the enzymes that would behave the same as a powdered alpha and gluco?
--JB