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Old 02-21-2012, 03:34 PM   #1
Cold Country Brewery
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Default 87.69% Apparent Attenuation even possible?

I’m trying to figure out how much grain I will need for a lager recipe I’m making. But the attenuation of the yeast is tripping me up. I was shooting for:
OG: 1.063
FG: 1.008

The only problem is when I calculate that it comes back with 87.69% Apparent Attenuation. Actual Attenuation of 71.38%. But Wyeast lists their yeast between 72-76% attenuation. But they go off of Apparent, not actual…right?

I know a beer can get that low with a starter, proper pitching rates, aeration etc. What am I missing? According to the Wyeast attenuation, there is no way I’m getting that low….
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Old 02-21-2012, 03:37 PM   #2
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Mash low and overpitch. You can get there. I got a doppelbock to go from 1.077 to 1.009. I pitched a ten gallon batch on the yeast cake from a lower gravity 10 gallon batch. I mashed at 152 , for 3 hours.

The beer is delicious...tastes all malty like a doppelbock should but doesn't fill you up. dangerous.
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Old 02-21-2012, 03:38 PM   #3
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Yes it is possible. You will probably need to mash low and long. Avoid crystal malts. Pitch very healthy amounts of yeast...in fact for a lager you are probably better off just racking onto the yeast cake from a previous batch.

Why exactly are you trying to hit those numbers? What is the grain bill like?
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Old 02-21-2012, 04:10 PM   #4
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Thanks guys, I just wanted to make sure it was possible. Thanks.
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Old 02-21-2012, 04:17 PM   #5
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Definitely possible. I've gotten as high as 90% before.
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