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Old 01-08-2013, 12:03 AM   #1
ChefJoeR
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Default This can't be right!! Efficiency?

Ok, fairly new to all grain brewing, but have been doing partials for about 4 years now. On third all grain brew. It's an American Amber Ale, shooting for a target O.G. of 1.065 and a F.G. of 1.016. Should be about 6.4%. Recipe is as follows

11.5 lb 2 row brewer's malt
1.68 lb Crisp amber malt
1 lb cara-pils
1 lb caramel 80
1 oz cluster @ 60
1 oz cascade @ 45
1 oz cascade @ 30
2 pkts SAFALE US-05

Ok, I thought I originally had low efficiency and when I went to calculate, my calculations show 160% efficiency!! WTF! Here is what I got. I collected 8.5 gallons of wort pre-boil at a gravity of 1.063. I did my calculation through "Designing Great Beers". Can someone help clarify this? Or you can just tell me that I am that friggin' awsome!!



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Old 01-08-2013, 12:11 AM   #2
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100% is the maximum possible, so something is clearly wrong. Did you cool your sample or temp correct?



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Old 01-08-2013, 12:28 AM   #3
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Ok, like i said, something has to be wrong. I did my calculation for gravity/temperature conversion from http://dd26943.com/davesdreaded/tools/convert.htm and it gave me a reading of 1.063. My wort temp was 154 and the gravity reading at that time was 1.042. Now, here is where some stupidity could be coming in. I was reading on a refractometer and read it at 10.5 brix. First time I have ever used one. Am I still going crazy?!

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Old 01-08-2013, 12:29 AM   #4
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this is second time I have done this recipe. The first time i did a 3 gallon batch since I only had a 5 gallon cooler to work with. I recently bought a 10 gallon, so of course I can do a full batch. My last batch hit all the numbers perfectly. It could be a case of the monday's!

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Old 01-08-2013, 12:32 AM   #5
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I plugged your recipe into BeerSmith and came up with much lower numbers. Assuming 80% efficiency, your OG was only 1.051 and FG of 1.011.

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Old 01-08-2013, 12:36 AM   #6
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10.5 brix = 1.042 sg
If you measured with a hydrometer, they are completely un reliable at higher temperatures.

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Old 01-08-2013, 12:39 AM   #7
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I can't comment on your situation, but I keep blowing the math on Hopville. I regularly brew 11.5 gallon batches with a hybrid BIAB method.

8 lbs malt (sometimes MO or combo of Vienna and Munich)
7 lbs Pilsen DME

And I generally hit about 1.050 for an efficiency of about 112%.

I bag mash in too much water, about 10 gallons, with regular dunking. And then I sparge the bag with about a half gallon at 170. I get really good extraction, I think. I can't figure it out. Maybe my boil volume ends up below 11.5? I get two kegs and leave the loose pellets and traub behind leaving the kettle and the fermenters. I like the results....

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Old 01-08-2013, 12:43 AM   #8
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You know, I think I know the problems. One, I don't need to do a temperature conversion when using a refractometer and two, I believe I mis-measured the amount of wort collected. I think it is more along the lines of 7.3 gallons. I need rethink my measuring methods next time. I just replugged my numbers and came out with 88%. Hey, what can I say, it's been a long day. At least this is what I think is wrong.

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Old 01-08-2013, 12:45 AM   #9
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i just did a double check with both the refractometer and the hydrometer with a cooled down sample, i am sitting at 1.054. gonna boil a little bit more to reach my target of 1.061. both numbers were the same when i used the cooled down sample with the hydrometer.

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Old 01-08-2013, 03:06 AM   #10
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So, you've been boiling for awhile (and adding hops at timed intervals), and now you're at 1.054?

If you boil longer than designed, how will you control the hop flavor/bitterness?

If you continue to boil, all of your late hop additions will become bitter, adding to the IBU's.



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