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Old 06-01-2009, 06:38 PM   #1
Brocster
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Default Sorry to ask, but...(Efficiency question)

I recently upgraded equipment to be able to brew 10 gallon batch sizes(actually I shoot for 11 gallons to account for some loss during fermenting). Since switching, my efficiency has tanked. I used to nail OG's, now I am way off. Assuming I am hitting my mash temps, what would be the things to look for? (I read a ton of the sticky's, but kind of got information overload and no real concise answer for what I am looking for).

Here is a short list of my "suspects"

  • Sparge temp too low
  • Too thick of a mash - I use 1.25 qts/lb.
  • Braid/manifold too small. I have a Coleman 70 quart cooler with a bazooka screen. This only goes about half way into the cooler, but is on the bottom with no loss of space below.
  • Grain crush - I use .35 on the setting at the LHBS. I crush there but do this myself.

I usually boil 13-14 gallons down to 11. I account for the 11 gallons in my recipe calcs.

Any feedback would be greatly appreciated. I plan on really ramping up some brewing over the next weeks to get a large supply ready from mid-summer and fall. Thanks everyone!
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Old 06-01-2009, 07:54 PM   #2
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Asides from your key points, do mix/stir them well during the mash?
I usually stir 2-4 times per mash session to make sure everything is mix well.

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Old 06-01-2009, 08:30 PM   #3
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Quote:
Originally Posted by undallas View Post
Asides from your key points, do mix/stir them well during the mash?
I usually stir 2-4 times per mash session to make sure everything is mix well.
I usually stir a lot before the mash and before the sparge (after water added), but not during. This make a pretty big difference? I assume you close the valve when stirring and vorlauf again.

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Bottled: Imperial Hefe, Saison, Apfelwein
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Secondary: Abbey Dubbel
Primary: Imperial Cherry Bavarian Hefe, Imperial Cherry Brussel Abbey
On Deck: World Class ESB, BKRye
"People who drink light 'beer' don't like the taste of beer; they just like to pee a lot." -- Capital Brewery, Middleton, WI

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Old 06-01-2009, 11:45 PM   #4
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Try
http://braukaiser.com/documents/efficiency_calculator.xls

You will have to take a number of readings, but that's the only way to determine where the problems are.

-a.

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