reVoxAHB
Well-Known Member
- Joined
- 3/3/07
- Messages
- 1,112
- Reaction score
- 17
Hey gang,
As the topic title suggests, I'm new to determining hop IBUs in a recipe; would appreciate guidance with an upcoming brew planned for the weekend.
I'll be brewing the Stone (American) IPA: Rate Beer review here and Beer Advocate review here. Stone Brewing Company website here
The recipe I've dug up, which seems pretty spot on calls for:
Hops:
Amount Name Form Alpha IBU Boil Time
-----------------------------------------------------------------------------
3.37 oz. (95.54g) Yakima Magnum Pellet 13.50 215.5 90 min.
1.50 oz. (42.52g) Centennial Pellet 9.00 0.0 0 min.
2.50 oz. (70.87g) Centennial Pellet 9.40 0.0 Dry Hop
*full ProMash Recipe Report follows the post.
Now, as I'm not able to source Magnum or Centennial pellets here in Aus, Belgrave Brewer suggested I substitute:
Yakima Magnum Pellet 13.50AA (sub with) Northern Brewer 9.5AA
Centennial Pellet 9.0AA (sub with) Cascade 6.7AA
Maths:
-----------------------------------------------------------------------------
I found the AHB Hops Calc whereby I plugged in a 1 unit AA conversion for Magnum to NB=
1 units of hops with an alpha acid strength of 13.50 is equal to 1.421 units of hops with an alpha acid strength of 9.5.
Does this mean I use the following maths:
95.54g (Mag) X 1.421 = 135.76g (NB) to be used 90 min.
42.52g (Cent) X 1.343 = 57.10g (Cas) to be used 0 min.
70.87g (Cent) X 1.343 = 95.17g (Cas) Dry Hop
?
Other:
-----------------------------------------------------------------------------
Found on the net: "FWIW, I picked up a Stone IPA coaster at a bar last month, and it lists the hops as Magnum, Centennial and Chinook to arrive at 77 IBU."
Is there such a thing as Starting and Arriving IBU?
In ProMash, I used the Hop IBU Calculator selecting Magnum with 13.50AA, 95.54g, 23.0L Boiled Wort, SG1.079, 90 Minute Boil, Form: Pellet and it's showing IBUs of 177.13 (and that's just the magnum).
Would this be starting IBU?
Obviously, the goal as the coaster and Stone website suggests, is to "arrive" at 77IBUs.
Thanks all,
reVox
Am I brewing the Death-Star? I already have a flux-capacitor.
*
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Stone 5th Anniversary IPA
A ProMash Recipe Report
BJCP Style and Style Guidelines
-------------------------------
14-B India Pale Ale, American IPA
Min OG: 1.056 Max OG: 1.075
Min IBU: 40 Max IBU: 72
Min Clr: 6 Max Clr: 15 Color in SRM, Lovibond
Recipe Specifics
----------------
Batch Size (Gal): 5.00 Wort Size (Gal): 5.00
Total Grain (Lbs): 15.25
Anticipated OG: 1.079 Plato: 19.04
Anticipated SRM: 7.1
Anticipated IBU: 215.5
Brewhouse Efficiency: 70 %
Wort Boil Time: 90 Minutes
Pre-Boil Amounts
----------------
Evaporation Rate: 15.00 Percent Per Hour
Pre-Boil Wort Size: 6.45 Gal
Pre-Boil Gravity: 1.061 SG 14.97 Plato
Formulas Used
-------------
Brewhouse Efficiency and Predicted Gravity based on Method #1, Potential Used.
Final Gravity Calculation Based on Points.
Hard Value of Sucrose applied. Value for recipe: 46.2100 ppppg
% Yield Type used in Gravity Prediction: Fine Grind Dry Basis.
Color Formula Used: Morey
Hop IBU Formula Used: Rager
Additional Utilization Used For Plug Hops: 2 %
Additional Utilization Used For Pellet Hops: 10 %
Grain/Extract/Sugar
% Amount Name Origin Potential SRM
-----------------------------------------------------------------------------
93.4 14.25 lbs. Pale Malt (2 row) Schreier U.S. 1.037 2
6.6 1.00 lbs. Crystal 20L America 1.035 20
Potential represented as SG per pound per gallon.
Hops
Amount Name Form Alpha IBU Boil Time
-----------------------------------------------------------------------------
3.37 oz. Yakima Magnum Pellet 13.50 215.5 90 min.
1.50 oz. Centennial Pellet 9.00 0.0 0 min.
2.50 oz. Centennial Pellet 9.40 0.0 Dry Hop
Extras
Amount Name Type Time
--------------------------------------------------------------------------
1.00 Unit(s)Whirlfloc Fining 15 Min.(boil)
1.00 Unit(s)Servomyces (yeast nutrient) Other 10 Min.(boil)
Yeast
-----
Wyeast 1764 Rogue Pac Man (original recipe calls for wlp001)
Mash Schedule
-------------
Mash Type: Single Step
Grain Lbs: 15.25
Water Qts: 19.82 - Before Additional Infusions
Water Gal: 4.95 - Before Additional Infusions
Qts Water Per Lbs Grain: 1.30 - Before Additional Infusions
Saccharification Rest Temp : 148 Time: 60
Mash-out Rest Temp : 168 Time: 15
Sparge Temp : 170 Time: 60
Total Mash Volume Gal: 6.18 - Dough-In Infusion Only
All temperature measurements are degrees Fahrenheit.
As the topic title suggests, I'm new to determining hop IBUs in a recipe; would appreciate guidance with an upcoming brew planned for the weekend.
I'll be brewing the Stone (American) IPA: Rate Beer review here and Beer Advocate review here. Stone Brewing Company website here
The recipe I've dug up, which seems pretty spot on calls for:
Hops:
Amount Name Form Alpha IBU Boil Time
-----------------------------------------------------------------------------
3.37 oz. (95.54g) Yakima Magnum Pellet 13.50 215.5 90 min.
1.50 oz. (42.52g) Centennial Pellet 9.00 0.0 0 min.
2.50 oz. (70.87g) Centennial Pellet 9.40 0.0 Dry Hop
*full ProMash Recipe Report follows the post.
Now, as I'm not able to source Magnum or Centennial pellets here in Aus, Belgrave Brewer suggested I substitute:
Yakima Magnum Pellet 13.50AA (sub with) Northern Brewer 9.5AA
Centennial Pellet 9.0AA (sub with) Cascade 6.7AA
Maths:
-----------------------------------------------------------------------------
I found the AHB Hops Calc whereby I plugged in a 1 unit AA conversion for Magnum to NB=
1 units of hops with an alpha acid strength of 13.50 is equal to 1.421 units of hops with an alpha acid strength of 9.5.
Does this mean I use the following maths:
95.54g (Mag) X 1.421 = 135.76g (NB) to be used 90 min.
42.52g (Cent) X 1.343 = 57.10g (Cas) to be used 0 min.
70.87g (Cent) X 1.343 = 95.17g (Cas) Dry Hop
?
Other:
-----------------------------------------------------------------------------
Found on the net: "FWIW, I picked up a Stone IPA coaster at a bar last month, and it lists the hops as Magnum, Centennial and Chinook to arrive at 77 IBU."
Is there such a thing as Starting and Arriving IBU?
In ProMash, I used the Hop IBU Calculator selecting Magnum with 13.50AA, 95.54g, 23.0L Boiled Wort, SG1.079, 90 Minute Boil, Form: Pellet and it's showing IBUs of 177.13 (and that's just the magnum).
Would this be starting IBU?
Obviously, the goal as the coaster and Stone website suggests, is to "arrive" at 77IBUs.
Thanks all,
reVox
Am I brewing the Death-Star? I already have a flux-capacitor.
*
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Stone 5th Anniversary IPA
A ProMash Recipe Report
BJCP Style and Style Guidelines
-------------------------------
14-B India Pale Ale, American IPA
Min OG: 1.056 Max OG: 1.075
Min IBU: 40 Max IBU: 72
Min Clr: 6 Max Clr: 15 Color in SRM, Lovibond
Recipe Specifics
----------------
Batch Size (Gal): 5.00 Wort Size (Gal): 5.00
Total Grain (Lbs): 15.25
Anticipated OG: 1.079 Plato: 19.04
Anticipated SRM: 7.1
Anticipated IBU: 215.5
Brewhouse Efficiency: 70 %
Wort Boil Time: 90 Minutes
Pre-Boil Amounts
----------------
Evaporation Rate: 15.00 Percent Per Hour
Pre-Boil Wort Size: 6.45 Gal
Pre-Boil Gravity: 1.061 SG 14.97 Plato
Formulas Used
-------------
Brewhouse Efficiency and Predicted Gravity based on Method #1, Potential Used.
Final Gravity Calculation Based on Points.
Hard Value of Sucrose applied. Value for recipe: 46.2100 ppppg
% Yield Type used in Gravity Prediction: Fine Grind Dry Basis.
Color Formula Used: Morey
Hop IBU Formula Used: Rager
Additional Utilization Used For Plug Hops: 2 %
Additional Utilization Used For Pellet Hops: 10 %
Grain/Extract/Sugar
% Amount Name Origin Potential SRM
-----------------------------------------------------------------------------
93.4 14.25 lbs. Pale Malt (2 row) Schreier U.S. 1.037 2
6.6 1.00 lbs. Crystal 20L America 1.035 20
Potential represented as SG per pound per gallon.
Hops
Amount Name Form Alpha IBU Boil Time
-----------------------------------------------------------------------------
3.37 oz. Yakima Magnum Pellet 13.50 215.5 90 min.
1.50 oz. Centennial Pellet 9.00 0.0 0 min.
2.50 oz. Centennial Pellet 9.40 0.0 Dry Hop
Extras
Amount Name Type Time
--------------------------------------------------------------------------
1.00 Unit(s)Whirlfloc Fining 15 Min.(boil)
1.00 Unit(s)Servomyces (yeast nutrient) Other 10 Min.(boil)
Yeast
-----
Wyeast 1764 Rogue Pac Man (original recipe calls for wlp001)
Mash Schedule
-------------
Mash Type: Single Step
Grain Lbs: 15.25
Water Qts: 19.82 - Before Additional Infusions
Water Gal: 4.95 - Before Additional Infusions
Qts Water Per Lbs Grain: 1.30 - Before Additional Infusions
Saccharification Rest Temp : 148 Time: 60
Mash-out Rest Temp : 168 Time: 15
Sparge Temp : 170 Time: 60
Total Mash Volume Gal: 6.18 - Dough-In Infusion Only
All temperature measurements are degrees Fahrenheit.