*Ss Brewing Technologies Giveaway - Enter Now!*

Home Brew Forums > Home Brewing Beer > Brewing Software > BeerSmith and IBUs
Reply
 
LinkBack Thread Tools
Old 02-16-2009, 12:40 AM   #1
The Pol
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2007
Posts: 11,616
Liked 54 Times on 51 Posts

Default BeerSmith and IBUs

So I am transferring my recipes from another software and placing them in BeerSmith... for some reason my IBUs are way off now. I am talking 20 IBUs off. I am using the same hop, same AA and same boil time in the recipe. I am also using the same type, leaf... so what gives. I have all of these recipes that I brew and now in BeerSmith they are apparently much more bitter? Whhhaaa?

__________________
The Pol is offline
 
Reply With Quote Quick reply to this message
Old 02-16-2009, 12:43 AM   #2
Beerrific
Feedback Score: 0 reviews
 
Beerrific's Avatar
Recipes 
 
Join Date: Mar 2007
Location: Georgia
Posts: 5,600
Liked 45 Times on 37 Posts
Likes Given: 9

Default

Are you using the same formula in each? (Rager, Tinseth, Garetz, etc.)

__________________
Beerrific is offline
 
Reply With Quote Quick reply to this message
Old 02-16-2009, 12:44 AM   #3
The Pol
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2007
Posts: 11,616
Liked 54 Times on 51 Posts

Default

Yes... I am... this is frustrating. In my other software if I switch from tinseth to gartez the difference is like 3 IBU... in BeerSmith the difference is 23 IBU... so that doesnt match either.

__________________

Last edited by The Pol; 02-16-2009 at 12:47 AM.
The Pol is offline
 
Reply With Quote Quick reply to this message
Old 02-16-2009, 12:58 AM   #4
The Pol
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2007
Posts: 11,616
Liked 54 Times on 51 Posts

Default

I now have the recipe in three different softwares, including Brew Builder at Brewmasters Warehouse and BeerSmith is like 20 IBUs off. I have not purchased BeerSmith yet, but if I cant get this figured out, this will be the reason that I dont. I dont want to go messing up all of my tried and true recipes.

__________________
The Pol is offline
 
Reply With Quote Quick reply to this message
Old 02-16-2009, 01:12 AM   #5
Nurmey
I love making Beer
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Nurmey's Avatar
Recipes 
 
Join Date: Jul 2007
Location: Omaha, NE
Posts: 4,001
Liked 28 Times on 25 Posts
Likes Given: 6

Default

Do you need to manually adjust the AAs on your hops? The default may be different between the two programs. Just a thought.

__________________
Batch 1 Brewing
The American Revolution would never have happened with gun control.
Nurmey is offline
 
Reply With Quote Quick reply to this message
Old 02-16-2009, 01:15 AM   #6
The Pol
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2007
Posts: 11,616
Liked 54 Times on 51 Posts

Default

Quote:
Originally Posted by Nurmey View Post
Do you need to manually adjust the AAs on your hops? The default may be different between the two programs. Just a thought.
Nope, I input my inventory with the correct type (leaf and pellet) and the correct AA. I am telling you, the AA, TIME and TYPE (leaf/pellet) are all identical.

I can put 1oz of 14.2 AA Leaf Magnum in BeerSmith for 90 minutes and it gives me 42.3 IBUs

I can put 1oz of 14.2 AA Leaf Magnum in StrangeBrew, or any other software, for 90 minutes and it gives me 37.4 IBUs

Multiply that by 4 additions and I end up 20 IBUs off... and I have no idea why.
__________________
The Pol is offline
 
Reply With Quote Quick reply to this message
Old 02-16-2009, 01:16 AM   #7
ajf
Senior Member
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
ajf's Avatar
Recipes 
 
Join Date: Oct 2005
Location: Long Island
Posts: 4,643
Liked 99 Times on 93 Posts
Likes Given: 39

Default

I would suspect that you haven't got Beersmith configured properly yet. I have the formulae for Garetz, Rager and Tinseth, and can check the calculations for you if you want.
All I need to know (for one recipe) is:
What formula are you using?
What is the pre-boil volume?
What is the pre-boil gravity?
What is the post boil volume?
How long do you boil?
What hop additions do you make in AA% and minutes to boil?
What types of hops are you using (whole leaf, plugs, or pellets)?

-a

__________________
ajf is offline
 
Reply With Quote Quick reply to this message
Old 02-16-2009, 01:17 AM   #8
The Pol
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2007
Posts: 11,616
Liked 54 Times on 51 Posts

Default

Quote:
Originally Posted by ajf View Post
I would suspect that you haven't got Beersmith configured properly yet. I have the formulae for Garetz, Rager and Tinseth, and can check the calculations for you if you want.
All I need to know (for one recipe) is:
What formula are you using?
What is the pre-boil volume?
What is the pre-boil gravity?
What is the post boil volume?
How long do you boil?
What hop additions do you make in AA% and minutes to boil?

-a

If all of the softwares are using Tinseth... what is there to configure? Why is it that I can use ProMash, BTP, Brew Builder... and they all come out the same in Tinseth, but when I have BeerSmith set up in Tinseth it comes out 20 IBUs higher? What else can I configure?
__________________

Last edited by The Pol; 02-16-2009 at 01:20 AM.
The Pol is offline
 
Reply With Quote Quick reply to this message
Old 02-16-2009, 01:27 AM   #9
Beerrific
Feedback Score: 0 reviews
 
Beerrific's Avatar
Recipes 
 
Join Date: Mar 2007
Location: Georgia
Posts: 5,600
Liked 45 Times on 37 Posts
Likes Given: 9

Default

I use Beer Alchemy (for Macs), and I know it has an issue with the volumes. It will drop the IBUs if the volume of finished beer (or volume at pitching) is less than the volume at the end of the boil. Treats the IBUs as if they are finite quantity not a concentration.

Anyway, maybe it is a volume thing.

__________________
Beerrific is offline
 
Reply With Quote Quick reply to this message
Old 02-16-2009, 01:31 AM   #10
The Pol
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2007
Posts: 11,616
Liked 54 Times on 51 Posts

Default

Okay...

Preboil volume 7.7 gallons at 1.062

90 miunute boil

1oz 14.2AA for 90 min
1.5oz 7.8AA for 45 min
.5oz 7.8AA for 20 min
1.0oz 7.8AA for 10 min

POST boil volume is 5.3 gal at 1.104 (2 pounds honey in boil)

I am getting 94.9 IBUs Tinseth in BeerSmith
I am getting 73.5 IBUs Tinseth (give or take 1 IBU) with everything else.

__________________
The Pol is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
help with IBUs please mw20 Recipes/Ingredients 2 12-07-2008 06:24 PM
Beersmith and IBUs/HBUs burns629 Brewing Software 4 11-02-2008 04:35 PM
Beersmith and IBUs Proofman Brewing Software 10 05-06-2008 05:00 AM
Help with beersmith: why does boil volume affect IBUs? SenorWanderer All Grain & Partial Mash Brewing 10 09-06-2007 08:07 PM
IBUs off in Beersmith? (HRR Clone) Llarian Recipes/Ingredients 9 03-28-2007 07:22 PM