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Old 01-20-2013, 05:08 PM   #1
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Default Efficiency

I just calculated an 87% efficiency on a Wit I made yesterday and I need to know if that is even possible. Here's my work
4.5 lbs of briess pilsen malt with a max ppg of 37.
4.5 lbs of briess white wheat malt with a max ppg of 39
0.5 lbs of rolled oats with a max ppg of 32
I collected 6.5 gallons of wort.
Below are the calculations for 100% efficiency.
37x4.5/6.5=25.6
39x4.5/6.5=27
32x0.5/6.5=2.5
55.1 points or 1.055
I tested my collected wort after stirring and got 12 brix on my handheld refractometer, or 1.048 sg.
48/55 is 87%
I made sure before hand that my refractometer was reading correctly. I work at a sugar plant and know all about Brix. I made 4 different Brix samples at work and tested them on our bench top refractometer and they all tested spot on the hand held. I even warmed the samples to 150 F and tested them to make sure temp didn't affect the readings, as my wort was about that warm.
So did I miss anything here. I just find it hard to believe I really hit that number.
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Old 01-20-2013, 06:55 PM   #2
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Sure it's possible. I have hit 92% before. Only once though. But I am usually in the high 70's and low 80's with my efficiency.
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Old 01-20-2013, 07:02 PM   #3
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With at least one sparge and more than 4 gallons collected that is completely reasonable. The low weight grain bill will boost you efficiency.

See here for details:
http://woodlandbrew.blogspot.com/sea...ain+less+sugar
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Old 01-21-2013, 05:04 AM   #4
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I do no-sparge BIAB and consistantly get efficiencies in the 80s
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Old 01-21-2013, 05:08 AM   #5
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Quote:
Originally Posted by SOMDBrewer View Post
I just calculated an 87% efficiency on a Wit I made yesterday and I need to know if that is even possible. Here's my work
4.5 lbs of briess pilsen malt with a max ppg of 37.
4.5 lbs of briess white wheat malt with a max ppg of 39
0.5 lbs of rolled oats with a max ppg of 32
I collected 6.5 gallons of wort.
Below are the calculations for 100% efficiency.
37x4.5/6.5=25.6
39x4.5/6.5=27
32x0.5/6.5=2.5
55.1 points or 1.055
I tested my collected wort after stirring and got 12 brix on my handheld refractometer, or 1.048 sg.
48/55 is 87%
I made sure before hand that my refractometer was reading correctly. I work at a sugar plant and know all about Brix. I made 4 different Brix samples at work and tested them on our bench top refractometer and they all tested spot on the hand held. I even warmed the samples to 150 F and tested them to make sure temp didn't affect the readings, as my wort was about that warm.
So did I miss anything here. I just find it hard to believe I really hit that number.
Absolutely, nice job and congrats...I love Wit
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