3 Gal BIAB Recipes Question

[mic]

Hey all! New to brewing & have been lurking for quite some time. I'm thinking skipping extract and going straight to BIAB.

My question is...What is a simple calculation that would take the 5 gal batch recipies here & converit it to 3 gal BIAB?

I'm assuming the calculations would be different from IPA/stout and so on.

Thanks for a great site!

Ryan

 

[pelipen]

My question is...What is a simple calculation that would take the 5 gal batch recipies here & converit it to 3 gal BIAB?

assuming same efficiency, you would just multiply everything by 0.6 (3/5).
Efficiency depends if you sparge the bag or not, but will generally be lower than with the traditional manifold. That's not an absolute rule though.
I would assume low, and see what your method yields then adjust. Maybe start with 0.75 x 5 gallon quantities. Be prepared to adjust gravity up, or boil longer, or end up with an extra gallon. Hop accordingly.

 

[bmunos]

Get some kind of brewing software like ibrewmaster for your phone. It will scale every part of your recipe for you. Important thing for 3gallon biab is a really good scale.

 

[inhousebrew]

Get some kind of brewing software like ibrewmaster for your phone. It will scale every part of your recipe for you. Important thing for 3gallon biab is a really good scale.

Second. Math is stoopid....

 

[mic]

Thanks for the input...and yes, math is stoopid!!!

What about the yeast? Just use the entire packet/vial?

 

[tknice]

Thanks for the input...and yes, math is stoopid!!!

What about the yeast? Just use the entire packet/vial?

I would think you'll be fine using the entire packet/vial--some beers would prefer it.

 

[FlyDoctor]

I would recommend mr. Malty for the yeast. Even with the reduced volume, you might need a starter or more grams of dry yeast than you think. Especially true if the tube/pack is as old as is typical from my LHBS.

 

[BrotherGrim]

If you use a standard HBS grind, you will have lower efficiency than a normal mash method, but if you are going to BIAB you can grind the crap out of it. I always regrind and I get anywhere from low 80's to low 90's if I make flour out of it. Irish moss cleans it up in primary and the beer turns out great. Good luck with your efforts.