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Old 08-06-2012, 03:24 PM   #1
xxkiskekyxx
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Aug 2012
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I'm making an imperial ipa with projected Abv of 8.7. Should I be concerned about the yeast dropping out before reaching that Abv.

 
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Old 08-06-2012, 03:34 PM   #2
Pilgarlic
 
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Anytime I go over 6% abv my concern with the yeast finishing increases. The way to deal with that concern is to pitch a sufficient quantity of healthy yeast (make a good starter), pitch it at the right temp (at or a bit below your fermentation temp), properly aerate or oxygenate the wort (for a beer of this size I use a shot of oxygen, at minimum vigorously shake it for five minutes) and manage your fermentation temp until it's finished (keep it consistent throughout active fermentation and bring it up some as activity wanes). Good luck.

 
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Old 08-06-2012, 05:41 PM   #3
dcp27
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pitch 2 packs of Safale S-05 and you'll be good, no concerns of it not making it

 
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Old 08-06-2012, 06:22 PM   #4
evrose
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Quote:
Originally Posted by xxkiskekyxx View Post
I'm making an imperial ipa with projected Abv of 8.7. Should I be concerned about the yeast dropping out before reaching that Abv.
You'll get more relevant answers if you tell us what yeast you're using...

 
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Old 08-06-2012, 08:46 PM   #5
duboman
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Quote:
Originally Posted by Pilgarlic View Post
Anytime I go over 6% abv my concern with the yeast finishing increases. The way to deal with that concern is to pitch a sufficient quantity of healthy yeast (make a good starter), pitch it at the right temp (at or a bit below your fermentation temp), properly aerate or oxygenate the wort (for a beer of this size I use a shot of oxygen, at minimum vigorously shake it for five minutes) and manage your fermentation temp until it's finished (keep it consistent throughout active fermentation and bring it up some as activity wanes). Good luck.
+1
In addition it definitely is relevant to know the type of yeast strain you are using and the rating of flocculation it has. I fou are using a yeast rated with high flocculation than the chances of it dropping out prematurely are greater than a low flocculating yeast and your fermentation temperatures will play into this.

For example if you ferment a high flocculating yeast at a lwer than optimal temperature than the yeast will simply drop out before finishing their task.

If you post your recipe and yeast we can assist you further with getting it pitched and fermented properly
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Old 08-07-2012, 12:39 AM   #6
strambo
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Oct 2011
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I'll second the 2 packs of S-05 recommendation, I've used it to almost 10% ABV w/o issue.

 
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Old 08-07-2012, 01:03 AM   #7
davcar74
 
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also, the drill attached stir device is a cheap (~$5) way to ensure good aeration (better than stirring and rocking) without stepping up to oxygen. I also double pitch with dry ale yeast for any higher gravity ales...but a starter is the way to go if you are using liquid...youtube video instructions here.....

 
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Old 08-07-2012, 01:05 AM   #8
davcar74
 
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That may be the most unflattering vid capture ever above....

 
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Old 08-08-2012, 11:53 PM   #9
xxkiskekyxx
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Aug 2012
Sewell, NJ
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I settled in wyeast 1056

 
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