Coldbreak Brewing HERMS Giveaway!

HomeBrewSupply AMCYL Brew Kettle Giveaway!


Home Brew Forums > Home Brewing Beer > Extract Brewing > My OG's are always low. What gives?
Reply
 
Thread Tools
Old 11-11-2006, 06:48 AM   #1
Toadkiller Dog
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2006
Posts: 13
Default My OG's are always low. What gives?

I swear that either the home brew kits exaggerate their alcohol potential or my water is less dense than other people's. Every time I make a kit, my OG is noticeably off. For example, I made MoreBeer's porter kit the other day. Followed the directions to a tee; they say the OG should be 1050 to 1055. Mine was 1038.

I even left it out in the cold to get it down to 60 degrees. And yes, I have tried 2 hydrometers and they concur. So what gives? Do I just need to add more malt extract?

On another note, man I love these smilies! They crack me up when I am trying to write a post.


Toadkiller Dog is offline
 
Reply With Quote
Old 11-11-2006, 07:01 AM   #2
Yuri_Rage
Gritty.
HBT_MODERATOR.png
Feedback Score: 0 reviews
 
Yuri_Rage's Avatar
Recipes 
 
Join Date: Jul 2006
Location: Southwest
Posts: 14,148
Liked 703 Times on 447 Posts
Likes Given: 76

Default

Have you corrected for temperature? If you are measuring the OG when the wort is hot, the hydrometer will read low. Most hydrometers are calibrated for 60 degrees.

Are you doing partial mashes? If that's the case, your mash efficiency might be low due to a variety of variables.

Those are the only things I can think of that would cause such a disparity in your OG readings in comparison with the recipe estimates.


__________________
Homebrewed Blog..........YouTube Channel .......... Shirts, posters, etc
Yuri_Rage is offline
 
Reply With Quote
Old 11-11-2006, 07:15 AM   #3
Mike B
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2006
Location: New York, NY
Posts: 88
Default

That's pretty funny. I just posted about the same problem. Maybe there's something going around . . .
Mike B is offline
 
Reply With Quote
Old 11-11-2006, 07:22 AM   #4
Yuri_Rage
Gritty.
HBT_MODERATOR.png
Feedback Score: 0 reviews
 
Yuri_Rage's Avatar
Recipes 
 
Join Date: Jul 2006
Location: Southwest
Posts: 14,148
Liked 703 Times on 447 Posts
Likes Given: 76

Default

I was just about to start in with the obligatory "don't double post" bit when I noticed that it's not a double post, just two people with the same problem. It would benefit both of you to give a detailed account of your ingredients and procedures so we can help you out. Low OG is common in AG brewing, but it's quite an oddity with extract beer. Wonder what's going on here?
__________________
Homebrewed Blog..........YouTube Channel .......... Shirts, posters, etc
Yuri_Rage is offline
 
Reply With Quote
Old 11-11-2006, 04:56 PM   #5
Mikey
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2005
Location: I'm gone!
Posts: 668
Liked 4 Times on 4 Posts

Default

There's two main causes:

1) larger batch size than intended. 5 imperial gallons is bigger the 5 US gallons. Some kits are for 20 liters/4 US gallons.

2) wort not stirred properly before taking a reading. All the extract is sitting on the bottom.
Mikey is offline
 
Reply With Quote
Old 11-11-2006, 08:08 PM   #6
Caplan
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2005
Posts: 1,165
Liked 5 Times on 5 Posts

Default

Quote:
Originally Posted by Toadkiller Dog
I made MoreBeer's porter kit the other day. Followed the directions to a tee; they say the OG should be 1050 to 1055. Mine was 1038.
If it's an extract based kit then Mikey has come closest

1 US Gallon = 3.8 Litres. 5 US Gallons = 19 Litres
1 Imperial Gallon = 4.5 Litres. 5 Imperial Gallons = 23 Litres.

So it's roughly 6 US Gallons to 5 Imperial Gallons.

Basing DME on a hydrometer reading of roughly 1.040 a pound in a US Gallon, you'd expect 6.1/4 lb to give you a reading of 1.050ish with the US and 1.040ish with the Imperial Gallon.
Caplan is offline
 
Reply With Quote
Old 11-11-2006, 09:52 PM   #7
Beerhead
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2006
Location: Boston, MA
Posts: 170
Default

Quote:
Originally Posted by Mikey
There's two main causes:

2) wort not stirred properly before taking a reading. All the extract is sitting on the bottom.
If all of the extract is on the bottom, is it ok for me to stir it now? a day later, or will the yeast get down into the extract and just mix it up through the whole fermenter?
__________________
"I wish it were winter so we could freeze it into ice blocks and skate on it and melt it in the spring time and drink it!"
Beerhead is offline
 
Reply With Quote
Old 11-11-2006, 10:17 PM   #8
Seveneer
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2006
Location: Hampshire, UK.
Posts: 102
Liked 5 Times on 2 Posts

Default

If the yeast has been in the wort for a day already then it's too late to take an OG measurement. I wouldn't worry about it this time. So long as the yeast does its thing you're going to end up with beer anyway .

/Phil.


__________________
http://www.philrobins.org.uk
Seveneer is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Double batch-different OG's? colonial General Techniques 5 10-27-2009 02:57 AM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS