Full Sail Wassail clone Hops IBU question

Beer Recipes
1

I am planning on brewing this up tomorrow. I found the recipe here http://www.byo.com/stories/recipeindex/article/recipes/98-english-a-scottish-strong-ale/2279-full-sail-wassail-clone
The recipe and the Full Sail website both state 55 ibu’s .
My brewing software tells me the recipe as given will have around 27.
Should I bump up the hops to get closer to the 55, or just brew it as the recipe states?

Full Sail Wassail clone
5 gallons/19 L, all-grain; OG = 1.070  FG = 1.014; IBU = 55  SRM = 29  ABV = 7.3%

Ingredients:

13.75 lbs. (6.2 kg) 2-row pale malt
9 oz. (0.27 kg) crystal malt (60 °L)
2 oz. (56 g) crystal malt (120 °L)
2 oz. (56 g) chocolate malt
1 oz. (28 g) roasted barley
1 oz. (28 g) black patent malt
1 tsp. Irish moss (15 mins)
2.5 AAU Northern Brewer hops (75 min) (0.36 oz./10 g of 7% alpha acids)
2.5 AAU Styrian Goldings hops (75 min) (0.5 oz./14 g of 5% alpha acids)
3.75 AAU Hallertau Hersbrücker hops (15 min) (1.1 oz./30 g of 3.5% alpha acids)
3.75 AAU Styrian Goldings hops (15 min) (0.75 oz./21 g of 5% alpha acids)
7.5 AAU Hallertau Hersbrücker hops (0 min) (2.1 oz./61 g of 3.5% alpha acids)
7.5 AAU Styrian Goldings hops (0 min) (1.5 oz./43 g of 5% alpha acids)
Wyeast 1968 (London ESB) or White Labs WLP002 (English Ale) yeast
0.75 cups corn sugar (for priming)

2

What software are you using and what formula is it using for hops?

3

A program called Homebrew Formulator.
It uses Tinseth.

4

Someone in my HBC, informed me that the 15 min. steep of the 0 minute hops is like a 20 min. addition and that adds the extra IBU’s.
Unfortunately they told me too late.
So if I brewed that recipe with 78 IBU’s what kind of beer would you call it?

5

I’m enjoying a couple of this year’s FS Wassail. To me it’s at least 55 ibu and no doubt has a citrus variety, maybe simcoe. I think it’s more of an IPA with dark crystal and chocolate roast.

6

Yep, alot of the brewery recipes can be tricky to duplicate in terms of hop schedule, because many breweries get a significant number of their IBUs post boil by whirlpooling for extended periods.  I agree that 78 IBUs is pretty IPA-ish.

7

I don’t know how a 15 minute post boil steep could be equivalent to a 20 minute boil addition. In my experience it would be closer to a 5 minute addition, maybe 10 depending on how fast you lose heat in your system.

8

I was wondering if they confused hop stand with first wort

9

All I know is when I adjusted the hops to get my IBU’s up to 55, the beer tasted more hoppy then the commercial beer.
If I did it again I’d follow the recipe only adjusting the hops for AA% and not worry about the IBU number that the software spits out.
I really should brew it again.