Originally Posted by MDVDuber
My question for the OP is how are you getting a 92% mash efficiency? That's just crazy good!
It was actually 86%. 92% was a guess for this very high gravity beer since normally I get around 95-96%. You can see my setup at www.TheElectricBrewery.com
With really high gravity beers efficiency drops because you're using less sparge water than usual to rinse more grain than usual and end up leaving more sugars behind. This is true of any brewing setup. I've brewed 9% ABV IIPA's and still achieved close to my regular 95% efficency. With this Barleywine the effiency dropped to 86%. Still very high. The end result was a 12% ABV beer instead of the original target of 12.5%.