Originally Posted by GrizlyGarou
This might seem a silly question, but is there a way to figure the percentage of conversion efficiency, or just the iodine test that will tell me if I've converted everything?
Nope, you can actually calculate the actual percentage. Then you can take your lauter eff. percentage... after doing both of these you can see where the bottleneck is (if any) in your system.
Eff. to the kettle is a dumb number, you cannot refine a process based on that #. If you can get your conversion eff. and lauter eff. numbers, than you can work on your process.www.braukaiser.com
He has a conversion eff. chart there based on malt/water grist ratio and SG. He also has a KILLER spreadsheet that will take inputs from your brew session and give you conversion eff., lauter eff., eff. to the kettle and eff. to the fermentor.
IMHO, these numbers are important, because without them you really have no idea what you are doing. You just know that somehow, somewhere, everything adds up to 70%. Well, you may not be converting 20% of your sugars... how else will you know? Or, you may be leaving 30% of your sugars in the mash when you lauter... how else will you know?
I have been tracking these #s lately as I am starting a push toward setting my sparge volume as a ratio of my grain bill size.(which is basically the opposite of what everyone else does) This way I can reduce my lauter eff. (yes I want to reduce it) and keep it consistent by keeping my sparge volume small for small grain bills and make it a larger volume for large grain bills. I cannot do this without these specific #s.