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Old 05-03-2008, 05:31 PM   #1
earlyd
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Default 90% Efficiency ?????

I am looking for some help on efficiency. I have done about a half dozen all grain batches and calculated the efficiency on all of them. With my efficiency at 76% to 81% I felt pretty confident I was doing it correctly. I brewed the other day and when I was going through my notes I calculated my efficiency at 90%. Now I would be very happy if it where correct but I have a feeling that I must have screwed something up. I did use a 5.2 buffer for the first time and was told that it might help with efficiency. I mashed with 1.5 qt of water per pound of grain for 1 hour @ 158 F. My temp did drop to 153 # by the end. I then sparged with 175 F water for 45 minutes. And collected 7 gallons of work. I stirred the wort and pulled a sample. I chilled that sample to 60 F and it read 1.050.

Below are my grain bill and my math. If anyone can let me know if this is correct and if not what I did wrong I would appreciate it.

GRAIN BILL

Malt 1: 9# Maris Otter Gravity Points 38
Malt 2: .75 # Flaked Barley Gravity points 32
Malt 3: .5# Dark Crystal 135 L Gravity Points 33
Malt 4: .13 # Chocolate malt Gravity points 28

MATH
G= Amount of Grain
P= Gravity points
W= Amount of pre boil wort (7 Gallons)

G*P/W I used this formula for all 4 grains.

WORK:
Malt 1: 9*38/7 =49
Malt 2: .75*32/7=3
Malt 3: .5*33/7=2
Malt 4: .13*28/7=. 5

Total = 55

I then add the total points together, round up and then divide the gravity points in my pre boil by that number. In this case my per boil gravity was 1.050.

50/55= .90 or 90 % Efficiency

Sorry it so long I just wanted to give as much info as possible.

Thanks,

~d

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Old 05-03-2008, 06:22 PM   #2
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I'm not confident in my answer but........ I average 10 points higher when I use PH 5.2 than when I don't. It's not apples-to-apples because I average 75-80 with 5.2 and 65-70 without it. But it could account for the difference.

Hopefully one of the "mathier" brewers will step in here, I are math wee todd did.

BTW, what style is this, and what'd you hop/ferment it with? It looks pretty tasty from the grain bill!

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Old 05-03-2008, 06:30 PM   #3
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Promash says 90% with the information you gave. Good Work........

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Old 05-03-2008, 07:14 PM   #4
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BeerSmith sez 94% Either way that's really high eff.

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Old 05-03-2008, 07:54 PM   #5
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I'm jealous.

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Old 05-03-2008, 11:45 PM   #6
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Thank you all for getting back to me.


~d

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Old 05-04-2008, 03:24 AM   #7
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Quote:
Originally Posted by Bernie Brewer View Post
BeerSmith sez 94% Either way that's really high eff.
Does this mean I can increase my efficiency by 4% just by using BeerSmithh to measure it?

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Old 05-04-2008, 11:57 AM   #8
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Quote:
Originally Posted by chriso View Post
I'm not confident in my answer but........ I average 10 points higher when I use PH 5.2 than when I don't. It's not apples-to-apples because I average 75-80 with 5.2 and 65-70 without it. But it could account for the difference.

Hopefully one of the "mathier" brewers will step in here, I are math wee todd did.

BTW, what style is this, and what'd you hop/ferment it with? It looks pretty tasty from the grain bill!
I used Kent goldings 1 oz at 60 .5 oz at 30 and .5 oz at 5min. I used an Irish ale yeast. I was just playing around and using up som left over grain. Time will tell if it was worth it or not.
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Old 05-04-2008, 01:59 PM   #9
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Quote:
Originally Posted by earlyd View Post
...collected 7 gallons of work. I stirred the wort and pulled a sample. I chilled that sample to 60 F and it read 1.050.....
So this is your boil kettle efficiency, correct? Not your overall efficiency?
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Old 05-04-2008, 02:25 PM   #10
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Quote:
Originally Posted by maltMonkey View Post
So this is your boil kettle efficiency, correct? Not your overall efficiency?

I am still new to all grain brewing so this might sound stupid but what is the difference???
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