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Old 11-12-2008, 05:10 PM   #1
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Default Full Boil vs. Partial boil Hops utilization

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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Old 11-12-2008, 05:13 PM   #2
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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.

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Old 11-12-2008, 06:59 PM   #3
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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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Old 11-12-2008, 07:00 PM   #4
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Quote:
You must seek out the Holy Turky Fryer.
Thouest Holy Turkey Fryer will hopefully cometh when the red fat man appears on the night of holy gifts.
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Old 11-12-2008, 07:38 PM   #5
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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-...n-using-87998/

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Old 11-12-2008, 07:39 PM   #6
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Originally Posted by Grinder12000 View Post
Thouest Holy Turkey Fryer will hopefully cometh when the red fat man appears on the night of holy gifts.
Fat red man brought mine last year.
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Old 11-12-2008, 07:50 PM   #7
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Default One way to save money with extract brewing

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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Old 11-12-2008, 08:09 PM   #8
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Originally Posted by Grinder12000 View Post
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.
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.
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Old 11-12-2008, 08:13 PM   #9
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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.

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Old 11-12-2008, 08:57 PM   #10
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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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