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Old 08-16-2008, 05:43 PM   #1
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Default Holy Boil-off Batman! Only 4 gal from 6.5 gallon boil?

So my 2nd all-grain batch didn't exactly go as planned. My first AG batch two weeks ago I miscalculated and only got 6 gallons into the brewpot, and 4.5 into the fermenter. My efficiency calculated at 68%.

This week I thought I calculated the sparge better, and after two batch sparges I sent 6.5 gallons to the brewpot. I dunno if I boiled it like a madman or something, but I only got FOUR GALLONS into the fermenter. Could I really have boiled off 2.5 gallons in 80 minutes?

To make matters worse, the OG was only 1.051 on that 4 gallons, giving me an efficiency of only 58%. (BTW, I thought the crush from the supplier looked way too coarse. If I'd been a more experience brewer, I probably would have recalculated the hops back a little anticipating a low OG.) So I've ended up with an American Pale Ale with an OG of 1.051 (which is OK I guess) but a calculated IBU 76.6!

Maybe it's a good thing there are only 4 gallons of this stuff. Hold me and tell me it'll be OK.

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Old 08-16-2008, 05:52 PM   #2
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Entirely possible, I'd say back off on the boil a bit.

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Old 08-16-2008, 05:53 PM   #3
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I don't know about holding you, but I'm sure it will be ok.

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Old 08-16-2008, 05:55 PM   #4
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I routinely boil off 2.5 gallons in the summer (60minute boil), If your pot is big enough you can adjust for it.

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Old 08-16-2008, 06:01 PM   #5
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hot didgity damn...do u turn your propane up to full blow?

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so barley is a leaves of hops? or barley is a different plant? and blend with hops? I need that to be cleared thanks..
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Old 08-16-2008, 06:04 PM   #6
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hot didgity damn...do u turn your propane up to full blow?
No, It's actually fairly low. I just try to keep a rolling boil. It was sort of breezy today so maybe that was part of it.

Also, I''m already seeing a really large amount of trub settling, more than I'd expect. I'll be lucky to get 3.25 gallons of clear beer out of this batch. Geez.
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Old 08-16-2008, 06:15 PM   #7
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No, It's actually fairly low. I just try to keep a rolling boil. It was sort of breezy today so maybe that was part of it.

Also, I''m already seeing a really large amount of trub settling, more than I'd expect. I'll be lucky to get 3.25 gallons of clear beer out of this batch. Geez.
ouch...well as long as it a great tasting 3.25 gallons than thats worth it to me
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so barley is a leaves of hops? or barley is a different plant? and blend with hops? I need that to be cleared thanks..
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Old 08-16-2008, 06:21 PM   #8
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ouch...well as long as it a great tasting 3.25 gallons than thats worth it to me
That "great tasting" part seems sort of unlikely at this point.

You know, 15 years ago when I used to brew extracts I routinely made 3 gallon batches. Of course, back then I did it on purpose.
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Old 08-16-2008, 06:21 PM   #9
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I usually shoot for 7.5 gallons into the kettle, boil off 2 in 60 minutes, and get about 5.5 into the fermenter. I try to keep a nice rolling boil, nothing outrageous.

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Old 08-16-2008, 06:45 PM   #10
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I've been getting a pretty similar experience too. I topped one off, without thinking and put the OG about 8 points below what I was shooting for. Guess my oktoberfest will have a bit less kick to it this year. Finished right on mark if that counts for anything.

What I have resulted with is collecting some extra off the lauter tun and adding it in later. It is expecially neccesary for me with recipies involving pilsner malt. I too would end up getting around 4.5 gallons if I let it go uncorrected for the whole 90 minutes. I collect an extra gallon or so usually and top it off right after the first hop addition at 60 minutes. I use a turkey fryer, and getting much more than 6.5 gallons in there is dicy at times. I make the addition right after the hops try to boil me over instead of before so as to have a little less volume to work with.

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