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Old 12-12-2008, 06:08 AM   #1
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Default Continuous hopping IBU’s?

So I jumped on the bandwagon and tried my hand at both a IIPA and continuous hopping and first wort hopping.

My question is how is the best way to figure the IBU’s of this monster.
Here is what I did, if you can tell me your estimates that would be great. I did some calculations myself and came up with an estimate of 84 IBU. I may be way off.
My OG is 1.071
Hops used
Amarillo whole leaf @ 9.3 AAU
Simcoe whole leaf @ 12.9 AAU

½ oz each first wort hopping

Then:
I took 3oz of each mixed in a big bowl
I added ¼ oz every 2.5 min for a total of 60 min

Any help from the IBU Gods?
Cheers
JJ


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Old 12-12-2008, 06:33 AM   #2
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Just getting through the FWH and 60-47.5 min additions, I have about 110 IBUs.


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Old 12-12-2008, 06:39 AM   #3
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...and by 32.5 min you have used up all your hops...with 162 IBUs...
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Old 12-12-2008, 07:09 AM   #4
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Quote:
Originally Posted by Brewsmith View Post
...and by 32.5 min you have used up all your hops...with 162 IBUs...
I had a 1/4 oz to put in every 2.5 min. thats 1 oz every 10 min a total of 6 oz + the 1/2 ea FWH a total of 7 oz. 3.5 Amarillo and 3.5 Simcoe

I didnt run out until I hit 60 min
I already brewed this bad mama jama
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Old 12-12-2008, 08:39 AM   #5
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I'm retarded...

I mistook the 3oz of each to mean 3 oz. total starting at 60 min...

At any rate, the IBU's are up there.
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Old 12-12-2008, 03:19 PM   #6
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Doesn't beersmtih have something for continuos hopping? I am at work so and I cant look at it but I think I remember seeing that in there before.
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Old 12-12-2008, 03:24 PM   #7
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yes, theoretically you could calculate the IBU contribution from each addition and add them up for your IBUs. I would suggest making a spreadsheet to do it and sharing it with everyone on the board!


Or you could see how the beer comes out, since it's already brewed at this point and what is done is done...
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Old 12-12-2008, 04:50 PM   #8
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Quote:
Originally Posted by Brewsmith View Post
I'm retarded...

I mistook the 3oz of each to mean 3 oz. total starting at 60 min...

At any rate, the IBU's are up there.
nah not retarded. tired maybe

Quote:
Originally Posted by dataz722 View Post
Doesn't beersmtih have something for continuous hopping? I am at work so and I can’t look at it but I think I remember seeing that in there before.
I am not sure if beersmith has that or not. I don't have beersmith

Quote:
Originally Posted by broadbill View Post
yes, theoretically you could calculate the IBU contribution from each addition and add them up for your IBUs. I would suggest making a spreadsheet to do it and sharing it with everyone on the board!
Or you could see how the beer comes out, since it's already brewed at this point and what is done is done...
Oh brother If I could design and create a spreadsheet I would. That’s a bit more than I can do.
I am not really worried about the beer, just wondering how to calculate it.
I calculated my additions into 4 groups

60 min:
Amarillo 1.25 oz 21% utilization 16 IBU
Simcoe 1.25 oz 21% utilization 22 IBU

45 min:
Amarillo .75oz 18% utilization 8 IBU
Simcoe .75oz 18% utilization 11 IBU


30 min:
Amarillo .75oz 15% utilization 6.5 IBU
Simcoe .75oz 15% utilization 9 IBU


15 min:
Amarillo .75oz 11% utilization 5 IBU
Simcoe .75oz 11% utilization 6.75 IBU
Total of 84.25

with the FWH going into the 60 min group

I wanted to see it there was a better way, or for that matter a more accurate way to calculate the hopping schedule
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Old 12-12-2008, 04:52 PM   #9
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Quote:
Originally Posted by Jaybird View Post
I had a 1/2 oz to put in every 2.5 min. thats 1 oz every 10 min
Am I still half asleep, or does 1/2 oz every 2.5 min make 1 oz every 5 minutes, not 10 minutes?
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Old 12-12-2008, 04:59 PM   #10
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Quote:
Originally Posted by ChshreCat View Post
Am I still half asleep, or does 1/2 oz every 2.5 min make 1 oz every 5 minutes, not 10 minutes?
yep.... I had it right in my OP, I just changed it in my second post. thanks
Cheers
JJ


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