2nd BIAB queries

[Duxuk]

I'm going from extract/ partial mash to BIAB as soon as I can get the new things together. My research on the forum has been very usefull. One thing I have discovered is that you need to raise your temperature from a mashing temp of, say, 68C to a mashout temp of the order of 78C. You stir enthusiastically as you do so and it will increase your efficiency by around 5 points. Don't know if you've all been doing this, but I thought I'd mention it anyway. :

 

[calumscott]

Sometimes it works, sometimes not...

Mashout usually gets me a point or two, fine crushed grain is the biggest winner for me so far. :thumb:

 

[PokeHer]

Sometimes it works, sometimes not...

Mashout usually gets me a point or two, fine crushed grain is the biggest winner for me so far. :thumb:

In your opinion, should I mash out for every BIAB?

 

[rich27500]

I would

 

[Duxuk]

This is my source of information.............it's only an opinion of course, but halfway down it says that mashout is not normally necessay in AG, but essential in BIAB.

http://www.thebrewingnetwork.com/forum/ ... php?t=4650

5 points of efficiency may be an exageration, but it sounds like it's worth doing.

 

[calumscott]

Yes, we discussed BIAB mashouts at length in another thread and the conclusion was "why wouldn't you?"...

 

[janus]

Hi there why dont you try at www.biabrewer.info there is a specific calculator for all the data you need and a lot of people tp help you without fidling with questimates?

 

[EskiBrew]

It's what Beersmith is telling me!

8.4kg grain, 20.5l batch size. Was looking for 1.064 preboil, only got 1.050. Beersmith says that's a mash efficiency of 23.4%

I had to lash in a kilo of extra fermentibles to get me back to where I wanted to be for the boil!

You're figures are not adding up here Calum :wha: - am I missing something?

Using 8.4kg of Maris Otter in a 20.5l batch, you'd have to be using a figure of somewhere like 49% efficiency to get a reading of 1.064. Even assuming that very low figure is correct then if you achieved 1.050, that would still be in the high 30s percent wise.

If you have a link to your recipe, I'll run the full figures :hmm:

 

[calumscott]

It's what Beersmith is telling me!

8.4kg grain, 20.5l batch size. Was looking for 1.064 preboil, only got 1.050. Beersmith says that's a mash efficiency of 23.4%

I had to lash in a kilo of extra fermentibles to get me back to where I wanted to be for the boil!

You're figures are not adding up here Calum :wha: - am I missing something?

Using 8.4kg of Maris Otter in a 20.5l batch, you'd have to be using a figure of somewhere like 49% efficiency to get a reading of 1.064. Even assuming that very low figure is correct then if you achieved 1.050, that would still be in the high 30s percent wise.

If you have a link to your recipe, I'll run the full figures :hmm:

Oooh hang on - maybe it's because of the extra fermentibles I lashed in the boil that's throwing Beersmith off...?

Yup... That looks better...

Total Efficiency was set to 70% in the original recipe (oops!) and BS told me to expect 1.063 pre boil/1.078 pre boil.

I hit 1.050 pre boil.

By taking out the extras (sugar and DME) that went into the boil it now gives me an efficiency of 39.7%

Thanks for spotting that! :thumb:

 

[EskiBrew]

Total Efficiency was set to 70% in the original recipe (oops!) and BS told me to expect 1.063 pre boil/1.078 pre boil.

I hit 1.050 pre boil.

By taking out the extras (sugar and DME) that went into the boil it now gives me an efficiency of 39.7%

Thanks for spotting that! :thumb:

Still confused how you get 1.063 only from 8.4kg grain at 70% in 20 litres but it sounds like you have figured something out :thumb:

 

[calumscott]

Total Efficiency was set to 70% in the original recipe (oops!) and BS told me to expect 1.063 pre boil/1.078 pre boil.

I hit 1.050 pre boil.

By taking out the extras (sugar and DME) that went into the boil it now gives me an efficiency of 39.7%

Thanks for spotting that! :thumb:

Still confused how you get 1.063 only from 8.4kg grain at 70% in 20 litres but it sounds like you have figured something out :thumb:

Ah, ballcocks, sorry - 7.4kg grain - the extra kilo was the sugars I added to bump up the gravity when I missed target.

Does that work out better?

 

[EskiBrew]

Ah, ballcocks, sorry - 7.4kg grain - the extra kilo was the sugars I added to bump up the gravity when I missed target.
Does that work out better?

Hmmm - even with 7.4kg at 70%, I still get a gravity of 1.080 :wha: