Redron
Regular.
Following on from MyQul's brewday thread and ongoing discussions re grain crush and efficiency...
Today I brewed a Tim Taylor Boltmaker clone with a view to improving my relatively poor efficiency from past brews using the true Biab method, i.e. Full 33L of strike water, squeeze the life out of the grain bag, and no sparge.
The recipe called for 3670 MO, 31 black malt and 195 crystal malt. I upped the MO to 4250 with a view to hitting a reasonable OG and to compensate for any 'poor'efficiency.
This time I used 22L strike water, mashed for 90 mins and then dunk sparged in a spare fv with a further 12 litres at 80degs for a good 10 minutes whilst the rest of the wort was on it's way to boil. I also stirred once during the mash and also stirred a couple of times during the dunk sparge.
After a 90 min boil I was left with 20L in the fv with an OG of 1040. According to the forum brewhouse efficiency calculator I make that 56.5% efficiency !
Disappointed ? I'll say. I can normally get somewhere between 60 and 68%.
This was an attempt to improve my efficiency, not make it worse !
Where am I going wrong ?
Today I brewed a Tim Taylor Boltmaker clone with a view to improving my relatively poor efficiency from past brews using the true Biab method, i.e. Full 33L of strike water, squeeze the life out of the grain bag, and no sparge.
The recipe called for 3670 MO, 31 black malt and 195 crystal malt. I upped the MO to 4250 with a view to hitting a reasonable OG and to compensate for any 'poor'efficiency.
This time I used 22L strike water, mashed for 90 mins and then dunk sparged in a spare fv with a further 12 litres at 80degs for a good 10 minutes whilst the rest of the wort was on it's way to boil. I also stirred once during the mash and also stirred a couple of times during the dunk sparge.
After a 90 min boil I was left with 20L in the fv with an OG of 1040. According to the forum brewhouse efficiency calculator I make that 56.5% efficiency !
Disappointed ? I'll say. I can normally get somewhere between 60 and 68%.
This was an attempt to improve my efficiency, not make it worse !
Where am I going wrong ?