Author Topic: IBU's off the chart  (Read 1054 times)

Offline CraigH

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IBU's off the chart
« on: April 13, 2018, 12:47:40 PM »
So, I loaded a pale ale recipe straight from the designer and everything in the BS recipe was spot on but the IBU's were off the chart (99).  Heck it gave me 3 IBU's for a 0 minute addition. Loaded the same recipe into my son in-laws BS and it came out normal (38)  I have been over this a bunch and I can't figure out whats wrong.  By the way it turned out great.  Can somebody make a few (hopefully not obvious) suggestions please.  Thanks.

Offline Oginme

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Re: IBU's off the chart
« Reply #1 on: April 13, 2018, 02:34:30 PM »
Kinda hard to look at if we can't see the recipe and hop addition schedule.  Export the recipe as a .bsmx file and post it for specific recommendations.

First thing I would check is the %AA for each of the hops to see how the hops you used compare with those of the recipe.

Next, if your 0 minute addition is giving you 3 IBU, I would suspect that you have some whirlpool additions.  If this is the case, then I would recommend changing the 0 minute addition to an immediate whirlpool/steep add.

When you do that, you may also want to look at your equipment profile and look at the section where the whirlpool/steep hop addition parameters are listed.  There is a box for 'estimate boil hop util in whirlpool'.  This will  add to the standard IBU for your boil hops, projecting additional isomerization for those additions.  If the original recipe did not count any bitterness for whirlpool additions, but contained such additions, then this factor as well as the additional IBU from the whirlpool may account for your increased value above what the recipe stated.
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Offline CraigH

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Re: IBU's off the chart
« Reply #2 on: April 13, 2018, 03:15:38 PM »
See if this helps.  Like I said when we loaded the same ingredients in my son in-law BS it came out different IBU's