Beersmith Ibu?

[sid]

Hey there, I have just got beersmith and was playing around with it trying to work it all out, so I made up a recipe for a lager (based on the american light lager, under "style") where I was doing a 12 litre batch size, the total grains/extract was 2.2kg, the boil time was 60 min.

Well that style beer says it should have an IBU of 8-22IBU, now in my recipe it says to reach that IBU profile,I need 260.27gm of hops, this doesn't sound right to me, I'm doing a 12ltr batch!!, i reckon it'll blow my head off, heheh. It uses 130.13gm green bullet hops at 60min, 55.77gm at 25min and then 74.36gm williamette at 20min.

this sound wrong or right? I can post the beersmith profile if you need to see it.

 

[Stuster]

Yep, that's not right at all. I think you'd probably need less than 5g of GB for that kind of beer and volume. Could you post a screen shot of it?

 

[sid]

Yep, that's not right at all. I think you'd probably need less than 5g of GB for that kind of beer and volume. Could you post a screen shot of it?

Hey ya stuster, I'll have to try and work out how to post the screen shot, in the mean time I can post a text profile of the beer below.


BeerSmith Recipe Printout - www.beersmith.com
Recipe: totara park lager
Brewer: sid
Asst Brewer: spike
Style: American Light/Standard/Premium Lager
TYPE: Partial Mash
Taste: (35.0)

Recipe Specifications
--------------------------
Batch Size: 12.00 L
Boil Size: 1.25 L
Estimated OG: 1.053 SG
Estimated Color: 7.7 SRM
Estimated IBU: 8.0 IBU
Brewhouse Efficiency: 75.0 %
Boil Time: 60 Minutes

Ingredients:
------------
Amount Item Type % or IBU
1.45 kg Pale Liquid Extract (8.0 SRM) Extract 65.9 %
0.30 kg Lager Malt (2.0 SRM) Grain 13.6 %
0.20 kg Rice, Flaked (1.0 SRM) Grain 9.1 %
0.05 kg Caramel/Crystal Malt - 60L (60.0 SRM) Grain 2.3 %
130.13 gm Green Bullet [13.50%] (60 min) Hops 5.6 IBU
55.77 gm Green Bullet [13.50%] (25 min) Hops 1.7 IBU
74.36 gm Williamette [5.50%] (20 min) Hops 0.8 IBU
0.20 kg Sugar, Table (Sucrose) (1.0 SRM) Sugar 9.1 %
1 Pkgs SafLager West European Lager (DCL Yeast #SYeast-Lager


Mash Schedule: Single Infusion, Full Body, Batch Sparge
Total Grain Weight: 0.55 kg
----------------------------
Name Description Step Temp Step Time
Mash In Add 1.43 L of water at 78.0 C 70.0 C 45 min

 

[Stuster]

Boil size 1.25L. I think that's where your problem lies.

 

[paulwin]

Boil size 1.25L. I think that's where your problem lies.

yeah i punched the info into beer smith you should have around 13 to 14 l boil size and with those hop amounts just the first addition came to 369 ibu

 

[sid]

thanx guys, I see where i went wrong, I had"set boil volume based on equipment" checked, when I changed batch size from 18.93ltr, based on a 2 gallon pot, down to batch size 12 litres it screwed it all up.............heh, now it's showing me a 297IBU, which would be right. One hell of a beer that would have been.

one other thing I noticed now i have it right, Is why does beersmith say to under fermentation, 4 days at 20 degrees and 7 2ndary at 20 deg if the saflager s-23 has a maximum temp of 10c???