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Old 06-07-2012, 03:34 PM   #1
dukes7779
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Default Efficiency varies..... Wtf

Have been doing my own milling for about 6 months and my efficiency has been anywhere from 70-85%........what gives?? Have made no adjustments to mill and have verified that my gap has not changed. Hitting temps also. What else could it be??

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Old 06-07-2012, 04:26 PM   #2
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bulk grain or buy each time? Do you check your crush as you mill? Particle size of kernels could change from batch to batch and cause fewer/more cracked grains.

Has anything in your process changed, ie. stirring techniques during, before, after mash/sparge? There has to be some subtle nuance.

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Old 06-07-2012, 04:32 PM   #3
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Buy in bulk, maybe different stirring during mash/sparge. Anything else I should be aware of??

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Old 06-07-2012, 04:35 PM   #4
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There is a good sticky at the top of this section about maximizing efficiency when batch sparging. The sparge /lauter process can have a big impact on efficiency.

The mash process can also affect it. Whenever I use pilsner grain, I need to step mash or I lose efficiency.

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Old 06-07-2012, 05:11 PM   #5
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Originally Posted by dukes7779 View Post
Buy in bulk, maybe different stirring during mash/sparge. Anything else I should be aware of??
pretty much your crush, avoiding dough-balls and stirring well before and after the mash and each sparge addition are the keys.
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Old 06-07-2012, 05:47 PM   #6
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Is it the same recipe? If not, efficiency generally suffers with larger grainbills. When I'm doing higher gravity beers, I adjust my efficiency in Beersmith down.

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Old 06-07-2012, 05:58 PM   #7
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I had a pretty low efficiency when starting out. I was averaging 60%. I changed the rate of draining my mash tun from as fast as I can to taking 20-30 minutes to drain my mash tun and another 20 minutes to drain my sparge water. This increased my efficiency to 75%. I guess the moral of the story is even the smallest tweak you do whether you realize you are doing it or not can make a big difference in your efficiency. Just be consistent with your process and the efficiency should stabilize.

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Old 06-07-2012, 11:21 PM   #8
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How fast do you mill? If I rip thru the grain fast w my drill - then I get 90%. If I slow it down around 200 rpms, then I get 75%...just what I notice...

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Old 06-07-2012, 11:25 PM   #9
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Quote:
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How fast do you mill? If I rip thru the grain fast w my drill - then I get 90%. If I slow it down around 200 rpms, then I get 75%...just what I notice...
Really? I read another thread where the consensus, with corona mills, was that milling as slow as possible would increase efficiency.
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Old 06-08-2012, 12:08 AM   #10
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Hi

Do you measure the input by weight or volume? If by weight, the moisture content may be varying (can be a 10% item - yikes!).

Anything that results in a finer crush will likely increase efficiency. Packing grain into the mill, running faster / slower (depending on the mill). Gap setting drifting with time. All will mess things up.

Lots of variables.

Bob

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