RIS IBU Troubles

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tlw08

tlw08

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Hello all. Having troubles working out a hop schedule for an aggressive RIS. :tank:

Rager Calculation has this recipe at 88 IBU. Tinseth has this recipe at undrinkable levels! Just trying to get a feel on whether I've got things at alright levels before I go and waste (or enjoy!) all these ingredients.

Russian Imperial Stout
OG 1.115
FG 1.029
Color 40 SRM
IBU 88?
Efficiency 70%
ABV 11.5%
Batch Size 5.0 gallons
Boil Size 2.8 gallons

Big Yeast Starter to be used.

Ingredients:

6lbs Dark DME (60min)
1lb Carapils (Added at 60min after initial Steep Mash @ 155 for 30min, @ 170 for 30 min)
8oz Chocolate Malt (Added at 60min after initial Steep Mash @ 155 for 30min, @ 170 for 30 min)
8oz Crystal 120L (Added at 60min after initial Steep Mash @ 155 for 30min, @ 170 for 30 min)
8oz Special B (Added at 60min after initial Steep Mash @ 155 for 30min, @ 170 for 30 min)
8oz Roasted Barley (Added at 60min after initial Steep Mash @ 155 for 30min, @ 170 for 30 min)
3lbs Amber LME (30min)
3lbs Amber LME (15min)

Hops:

1oz Warrior (15.8 AA%) @ 60min
1oz Yakima Magnum (13.5 AA%) @ 60min
0.5oz Glacier (6.0 AA%) @ 15min
0.5oz Glacier (6.0 AA%) @ 5min

Other:

1 Whirfloc Tab @ 15 min
1 Licorice Stick (0.7oz) at 0 min
8oz Maltodextrine @ Bottling Time, if needed

Yeast:

WLP007 Dry English Ale


Any help is much appreciated. Thank you





EDIT: My Recipe Link @ Hopville http://hopville.com/recipe/95082/russian-imperial-stout-recipes/russian-imperial-stout
 
Looks fine to me. I use Tinseth and I got worse efficiency than I planned, so even more IBUs. According to beersmith, 105 IBUs for my RIS. It tasted great at bottling, now it's pretty sweet (I'm guessing the priming sugar, been a couple months though). Not overly bitter/hoppy to me. I think your's looks just fine.
 
ODaniel said:
Looks fine to me. I use Tinseth and I got worse efficiency than I planned, so even more IBUs. According to beersmith, 105 IBUs for my RIS. It tasted great at bottling, now it's pretty sweet (I'm guessing the priming sugar, been a couple months though). Not overly bitter/hoppy to me. I think your's looks just fine.
Click to expand...

Thank you. Have you posted your recipe?
 
No, but here it is. Waiting on it to age a few more months at least to see how it is then.

Recipe: O'Daniel's Imperial Stout
Brewer: Rob O'Daniel
Style: Imperial Stout
TYPE: All Grain

Recipe Specifications
--------------------------
Batch Size: 5.00 gal
Boil Size: 6.84 gal
Estimated OG: 1.091 SG
Estimated Color: 59.1 SRM
Estimated IBU: 104.9 IBU
Brewhouse Efficiency: 60.00 %
Boil Time: 90 Minutes

Ingredients:
------------
Amount Item Type % or IBU
14.00 lb Pale Malt (2 Row) UK (3.0 SRM) Grain 63.64 %
3.00 lb Barley, Flaked (1.7 SRM) Grain 13.64 %
1.00 lb Caramel/Crystal Malt - 20L (20.0 SRM) Grain 4.55 %
1.00 lb Chocolate Malt (450.0 SRM) Grain 4.55 %
1.00 lb Oats, Flaked (1.0 SRM) Grain 4.55 %
1.00 lb Roasted Barley (300.0 SRM) Grain 4.55 %
0.50 lb Black (Patent) Malt (500.0 SRM) Grain 2.27 %
0.50 lb Wheat, Flaked (1.6 SRM) Grain 2.27 %
2.00 oz Challenger [7.50 %] (60 min) Hops 41.9 IBU
1.00 oz Fuggles [4.50 %] (60 min) Hops 12.6 IBU
1.00 oz Fuggles [4.50 %] (40 min) Hops 11.0 IBU
1.00 oz Goldings, East Kent [5.00 %] (30 min) Hops 10.7 IBU
1.00 oz Goldings, East Kent [5.00 %] (20 min) Hops 8.5 IBU
1.00 oz Challenger [7.50 %] (20 min) Hops 12.7 IBU
1.00 oz Fuggles [4.50 %] (20 min) Hops 7.6 IBU
4 Pkgs Nottingham Yeast (Lallemand #-) Yeast-Ale


Mash Schedule: My Mash
Total Grain Weight: 22.00 lb
----------------------------
My Mash
Step Time Name Description Step Temp
120 min Mash Add 22.00 qt of water at 172.1 F 153.0 F
Click to expand...

Yes I did 4 packets, haha. Huge blowoff in less than 12 hours.
 
Warrior and Magnum are both pretty mellow (not harsh like some other hops), I wouldn't worry about the bitterness.

What I would be worried about is the fermentability of your wort. Between the dark/amber extract, 2 lbs of crystal, roasted malts etc… you could end up with a very sweet beer. I would switch to light extract and get your color/flavor from the steeping grains
 

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