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Old 04-25-2012, 12:33 AM   #1
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Default FG too high?

I'm working on a DIPA recipe. I thought I had everything nailed down until I saw its expected FG: 1.024. Is that too high? The expected SG is 1.088.

If it's too high, what can I do to knock it down some? I want to keep the ABV about the same, mind you.

If it will help, I can post the recipe.

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Old 04-25-2012, 12:33 AM   #2
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I should say, as well, that the recipe is run through BeerSmith. So those are BS numbers, not my own calculations.

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Old 04-25-2012, 12:41 AM   #3
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My experience with software is that the FG is almost never predicted correctly. If you start with an OG of 1.088, it may give you the same FG as any other beer with an OG of 1.088, and not take mash temp, ingredients and yeast strain into consideration.

A better way to predict FG is through your own experiences, or ask someone around here what to expect based on a recipe. Some recipes have many more unfermentables than others, and Beersmith and other software programs still tend to give just an average attenuation number.

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Old 04-25-2012, 12:51 AM   #4
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Quote:
Originally Posted by Yooper View Post
My experience with software is that the FG is almost never predicted correctly. If you start with an OG of 1.088, it may give you the same FG as any other beer with an OG of 1.088, and not take mash temp, ingredients and yeast strain into consideration.

A better way to predict FG is through your own experiences, or ask someone around here what to expect based on a recipe. Some recipes have many more unfermentables than others, and Beersmith and other software programs still tend to give just an average attenuation number.
Should I just give it a go then and see what the FG settles down to?
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Old 04-25-2012, 12:53 AM   #5
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Should I just give it a go then and see what the FG settles down to?
If you're comfortable enough with formulating recipes and guestimating the FG, then sure! If not, you could post up the recipe and we could take a look and see what we think.
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Old 04-25-2012, 12:59 AM   #6
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what yeast you use and how you mash (temp & duration) will have a big effect on FG. beersmith doesn't always do a good job of evaluating these, and some things really depend on how things go on brew day. this past weekend i had a recipe that estimated my efficiency at 73%, turns out that i hit 81%... so my calculated FG in all likelihood isn't going to match my actual FG.

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Old 04-25-2012, 01:05 AM   #7
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Here's my recipe. It's a Falconer's Flight DIPA:

Quote:
Recipe Specifications
--------------------------
Boil Size: 3.00 gal
Post Boil Volume: 2.50 gal
Batch Size (fermenter): 2.50 gal
Bottling Volume: 2.10 gal
Estimated OG: 1.088 SG
Estimated FG: 1.024
Estimated Color: 10.3 SRM
Estimated IBU: 73.7 IBUs
Boil Time: 60 Minutes

Ingredients:
------------
Amt Name Type # %/IBU
7 lbs Pale Malt (2 Row) US (2.0 SRM) Grain 1 82.4 %
1 lbs Munich Malt - 20L (20.0 SRM) Grain 2 11.8 %
8.0 oz Caramel/Crystal Malt - 40L (40.0 SRM) Grain 3 5.9 %
1.50 oz Falconer's Flight [10.50 %] - Boil 60.0 min Hop 4 61.0 IBUs
0.25 oz Falconer's Flight [10.50 %] - Boil 20.0 min Hop 5 6.2 IBUs
0.50 tsp Irish Moss (Boil 10.0 mins) Fining 6 -
0.25 oz Falconer's Flight [10.50 %] - Boil 10.0 min Hop 7 3.7 IBUs
0.25 oz Falconer's Flight [10.50 %] - Boil 5.0 min Hop 8 2.0 IBUs
0.25 oz Falconer's Flight [10.50 %] - Boil 2.0 min Hop 9 0.9 IBUs
0.25 oz Falconer's Flight [10.50 %] - Boil 0.0 min Hop 10 0.0 IBUs
1.0 pkg Safale American (DCL/Fermentis #US-05) Yeast 11 -
1.00 oz Falconer's Flight [10.50 %] - Dry Hop 0.0 Days Hop 12 0.0 IBUs
It's only my second all-grain, 2.5-gallon batch. So be nice. I bruise easily.
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Old 04-25-2012, 01:06 AM   #8
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I plan to brew that this week, but I am tweaking things here and there. Also planning on using two packages of US-05, as of now, instead of the one listed above (if necessary).

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Old 04-25-2012, 01:31 AM   #9
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One package of yeast should be more than adequate for 2.5 gallons of 1.088 wort. Don't use two!

That recipe looks pretty good, but sort of high on crystal malt at 6%. I'd be inclined to reduce that just a bit. I also would consider dropping a pound of the base malt, and using 1/2 pound of corn sugar instead. That would make sure you don't have a too-high FG in the end. The Dark Munich will give you a darker color and malty backbone.

I'd probably increase the late hops from .25 ounce to .5 ounce, as IIPAs are all about hops aroma and flavor. I think you need more hops in those additions, but can reduce the bittering hops a tad.

Here's what I do with that grain/hop bill:

6 lbs Pale Malt (2 Row)
1 lbs Munich Malt - 20L
4.0 oz Caramel/Crystal Malt
.5 pound corn sugar
1.0 oz Falconer's Flight Boil 60.0 min Hop 4 (45-50 IBUs from this addition)
0.50 oz Falconer's Flight [10.50 %] - Boil 20.0 min
0.50 oz Falconer's Flight [10.50 %] - Boil 10.0 min
0.50 oz Falconer's Flight [10.50 %] - Boil 5.0 min
0.50 oz Falconer's Flight [10.50 %] - Boil 0.0 min
1.00 oz Falconer's Flight [10.50 %] - Dry Hop 5-7

Mash at 150. This should finish in the neighborhood of 1.012-1.014.

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Old 04-25-2012, 01:58 AM   #10
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Quote:
Originally Posted by Yooper View Post
One package of yeast should be more than adequate for 2.5 gallons of 1.088 wort. Don't use two!

That recipe looks pretty good, but sort of high on crystal malt at 6%. I'd be inclined to reduce that just a bit. I also would consider dropping a pound of the base malt, and using 1/2 pound of corn sugar instead. That would make sure you don't have a too-high FG in the end. The Dark Munich will give you a darker color and malty backbone.

I'd probably increase the late hops from .25 ounce to .5 ounce, as IIPAs are all about hops aroma and flavor. I think you need more hops in those additions, but can reduce the bittering hops a tad.

Here's what I do with that grain/hop bill:

6 lbs Pale Malt (2 Row)
1 lbs Munich Malt - 20L
4.0 oz Caramel/Crystal Malt
.5 pound corn sugar
1.0 oz Falconer's Flight Boil 60.0 min Hop 4 (45-50 IBUs from this addition)
0.50 oz Falconer's Flight [10.50 %] - Boil 20.0 min
0.50 oz Falconer's Flight [10.50 %] - Boil 10.0 min
0.50 oz Falconer's Flight [10.50 %] - Boil 5.0 min
0.50 oz Falconer's Flight [10.50 %] - Boil 0.0 min
1.00 oz Falconer's Flight [10.50 %] - Dry Hop 5-7

Mash at 150. This should finish in the neighborhood of 1.012-1.014.
You don't have to tell me to use more hops. I will do that happily.

The yeast was one thing I was going to figure out before brew day. I figured one packet would be OK, but I wasn't sure since it was 1.088. The recipe was originally a 5-gallon, partial mash brew so I had to do some tinkering down to the 2.5.

Regarding the corn sugar: I've never used it in a brew before. When's the best time to utilize it?

Thanks, yooper!
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