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11-12-2008, 05:10 PM
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#1
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Senior Member
Join Date: Jul 2008
Location: Columbus WI
Posts: 2,879
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Full Boil vs. Partial boil Hops utilization
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I'm surprised at how much extra hops you have to add when doing a partial boil.
I was playing with Beer Smith and when I flipped to a partial boil my hops utilization plummeted. So I increased the bitterness to the desired IBU and it was ABOUT 50% more hops needed.
YIKES - no wonder my brews always tasted a little more malty then I thought.
__________________
Grinders Island Brewery - Pipeline (Batch #)
Secondary Kentucky Common(83)
Primary #1 Scottish Ale 70(84)
Primary #2 The Black Pearl Porter(85)
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11-12-2008, 05:13 PM
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#2
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Senior Member
Join Date: Mar 2008
Location: Clarkston, MI
Posts: 734
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Yes, 'tis sad with the cost of hops nowadays.
Therefore, I shall charge you with a crusade. You must seek out the Holy Turky Fryer. 
__________________
Kyle
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11-12-2008, 06:59 PM
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#3
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Senior Member
Join Date: Feb 2008
Location: Oxford, MS
Posts: 812
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If you are using extract, or PM brewing, you also want to take into account that the late addition method does add some IBUs back.
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11-12-2008, 07:00 PM
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#4
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Senior Member
Join Date: Jul 2008
Location: Columbus WI
Posts: 2,879
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Quote:
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You must seek out the Holy Turky Fryer.
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Thouest Holy Turkey Fryer will hopefully cometh when the red fat man appears on the night of holy gifts.
__________________
Grinders Island Brewery - Pipeline (Batch #)
Secondary Kentucky Common(83)
Primary #1 Scottish Ale 70(84)
Primary #2 The Black Pearl Porter(85)
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11-12-2008, 07:38 PM
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#5
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Senior Member
Join Date: Jan 2007
Location: Armpit of Dallas (Irving), TX
Posts: 2,213
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We have been discussing this for a couple days. Some interesting new studies have coime out, and those calculations your getting in Beer Smith are probably higher than you are actually going to get.
http://www.homebrewtalk.com/f39/how-many-ibus-do-i-gain-lose-when-using-87998/
__________________
Fermenting: Nada
On Tap:Cran Wit, Dr Pepper Dubbel, Cascadian Pale Ale, Dark Chocolate Stout, Imperial Stout, Brown Mild, Schwarzbier
On Board: IIPA
www.franconiabrewing.com
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11-12-2008, 07:39 PM
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#6
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Senior Member
Join Date: Jan 2007
Location: Armpit of Dallas (Irving), TX
Posts: 2,213
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Quote:
Originally Posted by Grinder12000
Thouest Holy Turkey Fryer will hopefully cometh when the red fat man appears on the night of holy gifts.
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Fat red man brought mine last year.
__________________
Fermenting: Nada
On Tap:Cran Wit, Dr Pepper Dubbel, Cascadian Pale Ale, Dark Chocolate Stout, Imperial Stout, Brown Mild, Schwarzbier
On Board: IIPA
www.franconiabrewing.com
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11-12-2008, 07:50 PM
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#7
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Senior Member
Join Date: Nov 2008
Location: Portland, OR
Posts: 257
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One way to save money with extract brewing
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I was calculating about a 38% gain in IBU by using a 'full boil' gravity when doing extract batches. This is an important money saving tip in today's times. With hops going for $32/pound this is worth paying attention to.
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11-12-2008, 08:09 PM
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#8
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Senior Member
Join Date: Feb 2005
Location: Atkinson (near the Quad Cities), IL
Posts: 17,955
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Quote:
Originally Posted by Grinder12000
I'm surprised at how much extra hops you have to add when doing a partial boil.
I was playing with Beer Smith and when I flipped to a partial boil my hops utilization plummeted. So I increased the bitterness to the desired IBU and it was ABOUT 50% more hops needed.
YIKES - no wonder my brews always tasted a little more malty then I thought.
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That's not entirely true. Based upon my brewing technique, using 1 gal of water to 1 lb of malt I actually use fewer hops. Rarely do I ever use over 4AAs in a 5 gal batch with 6 lbs of malt. My Hefe Weizens only use 3AAs.
If you do a small boil and add all of the malt then, yes, you get very lousy utilization. 
__________________
HB Bill
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11-12-2008, 08:13 PM
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#9
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Senior Member
Join Date: Jul 2008
Location: Columbus WI
Posts: 2,879
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I've been doing 2.5g boils with 1lb for 60 min and the rest at 15min. Normally I'll have 3.5 to 4lbs of grain in a mini mash.
__________________
Grinders Island Brewery - Pipeline (Batch #)
Secondary Kentucky Common(83)
Primary #1 Scottish Ale 70(84)
Primary #2 The Black Pearl Porter(85)
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11-12-2008, 08:57 PM
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#10
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Maniacally Malty
Join Date: Apr 2007
Location: Oakland, CA
Posts: 21,798
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if you are doing partial mash with a partial boil, you can simply wait until the end of your boil to add your extract, then you will get better utilization from your hops 
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