Scaling Recipies- hops adjustments

[jwright]

I need a little help.

I am trying to tweak my Surly clone recipe and need some direction for the hop adjustments.
I usually manually adjust my hop quantities based on the aa% to match the recipe hops (aa X wt).

My question is, after adjusting quantities for any differences in the aa of the hops, which additions should be adjusted when the recipe is scaled up/down?

For example, if I scale 4 gal up to 5 gal (25%), I would adjust the 60 min addition up 25%(calc by aa) - easy. But, what about the late/aroma additions, should they be adjusted up as well and by the same amount? What about the dry hop?

I have seen multiple answers here, but usually in response to other questions, and certainly no consensus.

I know 25 % sounds like a big adjustment, but I do find myself often scaling up others 5 gal (batch size) to my 6 gal (I don't adjust for trub loss / dead space). I hope someone can offer some good common sense, KISS advice
thanks,
jason

 

[944play]

But, what about the late/aroma additions, should they be adjusted up as well and by the same amount? What about the dry hop?

Yes and yes.

But as you get to later and later additions, the aa% matters less. There may be some correlation between aa% and concentration of flavor-active compounds, but apparently it isn't very strong.

 

[Hammy71]

To much math for my head. Beersmith has a button for that....lol

 

[jwright]

Thanks for the responses.

I do use the Beersmith 'button' but it just adds the volume percentage increase to all of the hops across the board. I remember reading several discussions that debated the need to adjust later additions or to adjust to a lesser degree (can't find those now). I think that may have been what 944play was refering to.

cheers
jason

 

[kryolla]

the less into the boil you add hops i.e 5 min instead of 60 min the less the aa matters due to less ibu it will contribute to the beer

 

[SamuraiSquirrel]

Wow you saved me a post. I just scaled a recipe up from 5.0 to 7.5 gallons this weekend since it uses a buttload of hops and a buttload of dry hops as well. I figure by the time all is said and done I want 5 gallons. I was used beersmith to scale my recipe but wondered if the hop adjustment was right. I was planning on going with it as scaled by beer smth