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Old 02-26-2010, 03:22 AM   #1
jaginger
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Default Modified BIAB: hitting 85%+ efficiency

I've just started AG and after reading a bit decided to go BIAB for a little less equipment up front. I've been doing it a little bit modified though, since my 7.5 gallon kettle isn't quite large enough for a full 5.5 gallon BIAB batch.

So what I do is mash in the bag with 5.5 gallons (and the grain takes up the rest of the volume in the kettle.) After 60 mins I pull out the bag and dunk it in another bucket with 2.5 - gallons of water, then pour that water into the kettle as well.

My first 2 batches both produced over 85% efficiency. It would have been about 67% efficiency with the initial volume alone. The bag dunk got me another 18-20%. I am pretty happy with that, and it is really no trouble to do either.



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Old 02-26-2010, 03:26 AM   #2
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The dunk was your sparge. Good idea, great results.



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Old 02-26-2010, 03:33 AM   #3
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that is EXACTLY what I've been doing. I, too, regularly get efficiencies in the 80s. Just curious though, what is your water to grain ratio in the initial mash dunk?

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Old 02-26-2010, 03:42 AM   #4
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My 2 grain bills have been 12 and 13 lbs, and I went with 5.5 gallons just b/c that's about all i can fit in the kettle. So 22 qts/12 lbs is almost 2 qts/lb.

My OGs are getting too high though (i expected more like 70-75%), so I can drop down to more like 10-11 lbs of grain and then I'll be over 2 qts/lb.

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Old 02-26-2010, 03:58 AM   #5
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Man, I can't wait to start AG brewing. I know that I want to start with BIAB since it is the easiest equipment upgrade from extract, and I keep reading great posts like this making me think it is a good idea. I just hope I don't forget all this information...

Is there any way to subscribe to threads? I see people talking about doing it, but I can't seem to find the button...

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Old 02-26-2010, 04:57 AM   #6
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Quote:
Originally Posted by jaginger View Post
My 2 grain bills have been 12 and 13 lbs, and I went with 5.5 gallons just b/c that's about all i can fit in the kettle. So 22 qts/12 lbs is almost 2 qts/lb.

My OGs are getting too high though (i expected more like 70-75%), so I can drop down to more like 10-11 lbs of grain and then I'll be over 2 qts/lb.


yeah, im atleast 1.5 qt/lb in all my BIAB. The high ratio might be the cause of the good efficiency. People will neighsay about how a high ratio extracts all kinds of unwanted flavors from the grain, but my beer tastes good, thats all that matters.
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Old 02-26-2010, 05:18 AM   #7
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Quote:
Originally Posted by Gardenhead View Post
Man, I can't wait to start AG brewing. I know that I want to start with BIAB since it is the easiest equipment upgrade from extract, and I keep reading great posts like this making me think it is a good idea. I just hope I don't forget all this information...

Is there any way to subscribe to threads? I see people talking about doing it, but I can't seem to find the button...
at the top of the thread there's a drop down menu that says thread tools. just click on that and then there's an option that says subscribe to thread
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Old 02-26-2010, 05:34 AM   #8
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Originally Posted by Retarded_Penguin_Brewing View Post
at the top of the thread there's a drop down menu that says thread tools. just click on that and then there's an option that says subscribe to thread
Thank you! I totally missed that entire menu
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Old 02-26-2010, 06:34 AM   #9
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Nice! This BIAB thing is becoming my recommendation for beginner all grain brewing, it's cheap, easy and it works!

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Old 02-26-2010, 07:27 AM   #10
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Yes i did 1 brew in the bag batch and im thinking about doing more..cleanup is a breeze



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