Need Help with Hop Weights and Schedule for 60 IBU

Brewing Processes
1

I am working on a recipe that is measured at 60 IBU.

My setup is all-grain, 5.25 gallons (final product) 15.5 gallon keggle and 10 gallon mash tun.

The target recipe is:
OG – 1.084
TG – 1.020
IBU - 60
ABV - 8.7%

2 Row – 68% (about 11.15 lbs.)
Munich – 22.5% (about 3.70 lbs.)
C15 – 9.5% (about 1.55 lbs.)
Boiling Hops – Perle
Finishing Hops – Sterling

What I need help with is the hop weights and timing schedule to get to 60 IBU.

Who can help get me to 60?

2

Try this, you’ll like it.

3

We need more info…what’s the AA of the hops?  What are you looking for in terms of hop flavor and aroma?

4

based on
http://www.beersmith.com/forum/index.php/topic,4500.0.html
This is for a Rouge Double Dead Guy clone.
Recipe: Double Dead Guy Test 4
Style: Mailbock/Helles Bock

Recipe Specifications

Batch Size: 5.25 gal
Boil Size: 6.43 gal
Estimated OG: 1.086 SG
Estimaged FG: 1.018
Estimated Color: 9.5 SRM
Estimated IBU: 59.7 IBU
Brewhouse Efficiency: 75.00 %
Boil Time: 60 Minutes

Ingredients:

Amount Item Type % or IBU
11.55 lb Pale Malt (2 Row) US (2.0 SRM) Grain 70.00 %
3.30 lb Munich Malt (9.0 SRM) Grain 20.00 %
1.65 lb Caramel/Crystal Malt - 15L (15.0 SRM) Grain 10.00 %
1.85 oz Pearle [7.50 %] (60 min) Hops 53.0 IBU
1.75 oz Sterling [6.00 %] (5 min) Hops 6.7 IBU
1 Pkgs Pacman (Wyeast Labs #1764) [Starter 1000 mYeast-Ale

Mash Schedule: Single Infusion, Medium Body, Batch Sparge
Total Grain Weight: 16.50 lb

Single Infusion, Medium Body, Batch Sparge
Step Time Name Description Step Temp
60 min Mash In Add 20.63 qt of water at 163.7 F 152.0 F

Notes:

** SCALE RAGER FOR ACCURATE IBU AROUND 60 **

He was also confused on the differences between Tinseth and Rager in hitting his IBU target.

5

Pearle AA is 8.0 and Sterling 6.1 (Brewmasters Warehouse).

The recipe posted below - does this look right? While it does get to 60 IBU, would you go with more Pearl at 60 and less at flameout?

6

It all depends on what you’re trying to achieve.  Do you want more bitterness and less aroma?  If so, then do what you suggest.

7

Denny, I am not sure  ???

I am going for a Double Dead Guy clone; Rogue lists the IBU at 60.

IBU measures the bitterness right? Then the early additions @ 60 minute would contribute the most while late editions (5-0 minute) would contribute the least.

8

Yeah, by the time you’re down to 0 min. you theoretically get no IBU.  You might in reality get 1 or 2 since it takes a bit to cool the wort.  I’d recommend you go with Fred’s suggestion.