Home Brew Forums > Home Brewing Beer > Extract Brewing > Converting from 7 gallon boil to 3 gallon partial boil
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Old 06-25-2010, 03:48 PM   #11
BogusOwnz
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yes you helped a lot. I'm just gunna add half at the start and half at the end.


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Old 07-27-2010, 04:33 PM   #12
travis2827
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Default Partial Boil Difficulty with OG

I have tried a few of Jamil's recipes and have been off around 20 points on my OG. I think the concentration of my wort is off when I rack it to the fermenter. Many people here are saying cut the recipe in half from a 6 gallon to a 3 gallon. If you start with 7 gallons for the pre-boil on the full boil recipe, shouldn't the starting volume of the partial boil be 3.5 gallons. Also, depending on the evaporation rate wouldn't the pre-diluted wort be of varying concentration. So if my stovetop is boiling 1.2 gallons per hour vs. the book's 1 gallon per hour wouldn't my 2.5 gallons of concentrate solution be 20 percent higher than the book's affecting the OG of my wort once I dilute to the 5.5 gallon mark on my fermenter. Thanks in advance for any help.
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Old 08-02-2010, 02:22 PM   #13
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Quote:
Originally Posted by travis2827 View Post
I have tried a few of Jamil's recipes and have been off around 20 points on my OG.
Are you 20 points high, or 20 points low?
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