FG estimation - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > General Techniques > FG estimation

Reply
 
Thread Tools
Old 02-14-2007, 08:24 PM   #1
dbriggs10
Recipes 
 
Jan 2007
New York, NY
Posts: 24


So I bought a Fat Tire Clone kit from AHS and decided to see what the 1% alcohol boost was all about. The instructions that were included in the kit did not mention the 1% boost... However the 1% boost package said that it should be added to the boil. So I added the 14 oz supercharged corn sugar once the wort came to a boil. I continued the process an I normally would and found that my OG was 1.062, much higher than the expected OG of 1.050. I have to assume that this is due to the 1% boost addition.

I pitched Nottingham dry yeast and I have it fermenting at 70 F.

My question is: Since my OG was higher than expected, will my FG also be higher than expected??? (expected FG - 1.010)

How will this affect the length of time it will need in the primary / secondary fermenter?



 
Reply With Quote
Old 02-14-2007, 09:07 PM   #2
cweston
 
cweston's Avatar
Recipes 
 
Feb 2006
Manhattan, KS
Posts: 2,014
Liked 18 Times on 11 Posts


Quote:
Originally Posted by dbriggs10
My question is: Since my OG was higher than expected, will my FG also be higher than expected??? (expected FG - 1.010)
No. Corn sugar is virtually 100% fermentable. So if the "alcohol boost" is, in fact, corn sugar, the final gravity will be essentially the same as if you hadn't added it.

This is how some Belgian styles manage to be fairly dry in spite of their high alcohol content: a fairly significant amount of sugar is used in the wort, and since it is nearly 100% fermentable, the attentuation is higher than in an all-malt wort.
__________________

Primary: none
Secondary:
Bottle conditioning: Robust Porter
Drinking: Saison Dupont clone, tripel
Coming soon: Columbus APA, Rich Red ale

 
Reply With Quote
Old 02-14-2007, 09:35 PM   #3
WOP31
 
WOP31's Avatar
Recipes 
 
Feb 2007
Posts: 1,342
Liked 14 Times on 7 Posts


I would expect it to come out a little drier than you had expected. Just so you are not suprised. but it should ferment out all the way.
__________________
"Yes, I am a pirate two hundred years too late. The cannons don't thunder there's nothin' to plunder,
I'm an [under] forty victim of fate, Arriving too late, arriving too late."
-Jimmy Buffet

 
Reply With Quote
Old 02-14-2007, 09:56 PM   #4
dbriggs10
Recipes 
 
Jan 2007
New York, NY
Posts: 24

Thanks for the insight!!!

Will it take longer to ferment? I'm thinking about leaving in the primary for 10 to 14 days.

 
Reply With Quote
Old 02-14-2007, 10:21 PM   #5
Kaiser
 
Kaiser's Avatar
Recipes 
 
Nov 2005
Pepperell, MA
Posts: 3,895
Liked 129 Times on 75 Posts


Quote:
Originally Posted by cweston
No. Corn sugar is virtually 100% fermentable. So if the "alcohol boost" is, in fact, corn sugar, the final gravity will be essentially the same as if you hadn't added it.
Actually, expect it to be a little lower because of the additional alcohol.

Kai

 
Reply With Quote
Old 02-20-2007, 06:51 PM   #6
dbriggs10
Recipes 
 
Jan 2007
New York, NY
Posts: 24

Well, I transferred to the secondary last night and found that the gravity was at 1.020 (same as 3 days ago)... Still a bit high from the expected FG of 1.010. I plan on letting it sit in the secondary for two weeks and then bottling. Should I be concerned that I might have a stuck ferment? With the additional sugar (from the 1% boost & future priming sugar), might I have problems with bottle bombs down the road?

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Stupid OG estimation question salad 419 Mead Forum 3 08-22-2009 04:21 PM
SG estimation chemman14 Beginners Beer Brewing Forum 3 06-26-2009 08:44 PM
Estimation of OG ReverendTap General Techniques 2 05-31-2009 01:02 PM
Promash Alcohol Estimation Steve973 Equipment/Sanitation 2 08-25-2005 01:47 PM


Forum Jump