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Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Original Gravity Low for Double IPA
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Old 06-23-2012, 12:43 AM   #1
lundy
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Default Original Gravity Low for Double IPA

So I just finished brewing what was supposed to be a Double IPA and I hit a wall when i saw my original gravity atr 1.056 and i was aiming for 1.108.

I have a had some issues in the past with other beers but not nearly this bad. I am fairly new to all grain brewing but i have had 2 successfull batches before this one where i hit my numbers.

Im not sure if this is an issue with the amount of grain I had, which was 19 lbs.

Any input would be awesome.

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Old 06-23-2012, 02:25 AM   #2
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that is way far off, any chance the grain hadn't been crushed?

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Old 06-23-2012, 03:16 AM   #3
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you're leaving a ton of info out. That said, I'd look at the crush for sure. that's the number 1 culprit. how did you come to the target of 1.108?

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Old 06-23-2012, 04:23 AM   #4
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Also, what was your target efficiency? Typically, brewing a beer that big will reduce your efficiency by about 10%.

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Old 06-23-2012, 01:32 PM   #5
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The crush should be ok. Ive been using the same mill at the supply store for a while and ive not had a problem, Unless over crushing causes a big issue with loss of sugars.
The numbers i have came from pro-mash. Ive been using that program for a long time and the SG numbers I have used have been all good for the time i have been brewing. It assumes a efficiency of 75% all the time. ( You can change it), but like i said i have always hit the numbers right on or slightly lower.
Even if I lower my efficiency 10% im still WAY off on my gravity. To get the epic fail I have my efficiency would be close to 40%, which i have NEVER had before.

let me know what else you need to know, Im new to the forums, so im not sure all the stuff you guys look at.

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Old 06-23-2012, 02:08 PM   #6
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I am batch sparging and on this particular time i put a bit to much water in and had extra rinse water in the mash tun. Would that cause a massive efficiency drop.

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Old 06-23-2012, 03:37 PM   #7
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Quote:
Originally Posted by lundy View Post
I am batch sparging and on this particular time i put a bit to much water in and had extra rinse water in the mash tun. Would that cause a massive efficiency drop.
Not sure how it would relate to efficiency, but too much water will reduce your gravity quite a bit.
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Old 06-23-2012, 03:48 PM   #8
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I dont think it was all that but that might have played a hand. I would have needed 3 extra gallons to go as low as i did.

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Old 06-23-2012, 04:25 PM   #9
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What do you mash in?
Mash water to grain ratio?
How much water did you sparge with?
Did you remove ALL the clumps in the mash at the start? I've seen this bugger your efficiency before.

We need to have more information about the batch process in order to narrow it down. It's pretty obvious that you didn't mash well. The reason could be any of several, or a combination of them.

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Old 06-23-2012, 05:23 PM   #10
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Mash tun is a 52 qt rectangular cooler. I am fairly certain that I removed all the clumps of grain, as i didnt find any dry spots in my mash. water to grain ratio was about 1.2 , 6 gallons to 19 lbs of grain. Mashed for an hour. I did get a stuck mash as i am draining with a pvc manifold. I fixed it by blowing through my drain tube to clear the manifold. Probably not good for oxidation and such but I didnt have much choice. after it unclogged it drained smooth. I dumped in roughly 4 gallons of water to sparge with and then drained. That turned out to be a bit to much drain water becasue i only had that one rinse. I immidiatly went to boil and the rest of the process.

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