Increasing ABV question

[orange]

Hello all, I fancy trying the Guinness extra stout for my AG#2 but would like to raise the ABV from 3.8 to 5.0. Is there a calculation for increasing the grains, sugar and hops to do this? :wha:

Orange

 

[phettebs]

Do you use brewing software at all? I use BeerSmith so I just start increasing the grain(s) proportionally until I get the OG I'm targeting. Post your recipe and someone can help you bump it up to reach your target gravity. That's another important point: you are really trying to increase your target gravity because your ending abv % is a whole different set of variables! However, starting with the right OG will set you up to achieve your target abv.

I've never used it but the forum calculators will probably do what you need as well.

Baz

 

[orange]

For 23l
pale malt 3140
flaked barley 895
roasted barley 445

target hops 35

FG 1013

Orange

I did look at the forum calcs before posting. no find.

 

[phettebs]

This is very rough but assuming 75% efficiency, a target OG of 1.050, an FG of around 1.012 would get you to about 5% abv.

Your new grain bill would be:
pale malt: 3619
roast: 630
flaked: 1074

I don't have BeerSmith in front of me so hopefully someone can check my numbers. I used a quick and dirty program I wrote a few years back.

Baz

 

[orange]

Thank you Baz. I will use those amounts. Would the hops stay the same?

Orange

 

[robsan77]

try northdown instead of target. IMO and many others, a much nicer hop for a stout. Wont be like guiness though......... It'll be better :)

 

[orange]

Will do.

Orange

 

[Good Ed]

I'd go for 50 IBU all as start of boil addition

Good luck :

 

[orange]

I'd go for 50 IBU all as start of boil addition

Good luck :

Sorry for being a bit slow but does 50 IBU mean 50g of hops?

Orange

 

[evanvine]

IBU - International Bittering Unit.
Should be printed on your hop packet.

 

[Good Ed]

Use the calculator on this forum to calculate your IBU; as Jim says put your AA% in and play around with the quantity until you get the right IBU

 

[orange]

Weight of hops = EBU x 10 x Volume, divided by AA% x utilisation.

I used an estimate of 29% for the utilisation and came up with 45.6g of northdown hops. :clap:

I can't believe i just did that,

Thanks guys

Orange

 

[John_Henry]

Thinking of doing another stout myself soon. I read in a few places that to get a real Guinness sourness use some sour Guinness, i.e. leave a pint of guinness out on the side to go sour for a few days, then boil in the copper, I think I'll be giving it a go. Let us know how the brew goes.