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Old 03-10-2006, 11:55 PM   #1
captaineriv
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Default High gravity brewing

I am planning to follow a recipe (5 gallon) I found to make an imperial stout with OG approximately 1.110 to result in about 11% ABV. The recipe looks like it's trying to clone Rogue imperial stout or Avery Czar, both of which I love. Ohterwise, I probably wouldn't shoot for such a high gravity brew. My mash/lauter tun will only accomodate about 15 lbs. of grain and my brew kettle is only 8 gallons. The grainbill for this recipe (including all specialty grains) is 38.5 lbs. Only 26 lbs. of this is base malt. How would I go about doing this with my equip? Would I essentially do 2 or 3 mashes, yielding about 15 gallons of wort, and then just boil the living crap out of it a third at a time until I'm left with 5.5 gallons or so? Or am I just completely off track with this idea? Any help with high gravity brewing would be great. I've never done anything with an OG higher than about 1.060. I do however want to use AG as opposed to a partial mash regardless of the amount of time/effort involved.

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Old 03-11-2006, 12:14 AM   #2
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you could scale the recipe in half...( i know its alot of work for 2.5-3 gallons)

sounds good btw whats the recipe?, i wouldnt mind doing a partial mash version with 6 lbs of dme...

im planning on doing a russian imperial next anyway...

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Old 03-11-2006, 01:51 AM   #3
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Here's the recipe. Looks pretty good to me. Let me know what you think.

And is it just something screwing up on my end, or did my thread get posted 3 times?

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Old 03-11-2006, 01:58 AM   #4
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My last batch was an all grain clocking in at 1.100. I used 13lbs for a 4 gallon batch. I collected 6 gallons of runoff and boiled it for 2 hours down to the 4 gallons. This was my first time attempting such a gravity so I scaled back the batch size as not to exceed the volume my setup could handle.

I don't see how you would need over 38lbs of grain to reach your gravity for a 5 gallon batch. I averaged an 83% efficiency but even with something around 70% you would only need about 21lbs of grain. I suggest you do some recalculating.

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Old 03-11-2006, 02:04 AM   #5
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Quote:
Originally Posted by captaineriv
Here's the recipe. Looks pretty good to me. Let me know what you think.

And is it just something screwing up on my end, or did my thread get posted 3 times?

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Old 03-11-2006, 02:07 AM   #6
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I questioned it myself but never plugged it into Promash. I'm following the recipe here: http://www.strandbrewers.org/recipes/maxeysimp.htm. Seems a little strange that all that grain is needed but the only thing I can think of is that there's about 12.5 lbs. of specialty grains that don't contribute much in the way of fermentables. The recipe didn't mention what efficiency that was based on.

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Old 03-11-2006, 02:12 AM   #7
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i think its supposed to be 16 lbs not 26...that makes more sense
do oats add sugar?
i got an og of 1.112 with 70 percent efficiency using 16 lbs 2-row and 10 lbs (crystal/black/roasted/choco) i didnt count the oats...

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Old 03-11-2006, 02:20 AM   #8
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Thank you both for pointing that out. Plugged it into Promash and even with only 16 lbs. 2 row, I get 1.110 at 52% efficiency. You couldn't get that low of an efficiency even if you tried. Guess that's what I get for being too lazy to plug that large a recipe into promash. I'll modify this recipe a little as far as grain. The hopping schedule looks fine.

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Old 03-11-2006, 02:30 AM   #9
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I counted the oats in my Promash calc. Either way, 16 lbs. sounds much more logical. Now that I think about it, 26 lbs. 2 row is way excessive. I just blindly took the recipe's word for it since I haven't messed with any high gravity ales. But common sense definitely suggests significantly lower.

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Old 03-11-2006, 04:05 AM   #10
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It looks to me the recipe may be for 10 gallons. At 77% efficiency this would put it around 1.110 with 75 ibu's.

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