That'd be me mate! Got to remember too that when Mark says 80% efficiency that's for my into boiler %. Overall (brewhouse %) I'm still hovering around the 65% mark but think it will improve if I can finally nail my numbers. I seem to loose efficiency in my boil phase.
How do you lose efficiency during the boil? Is your SG lower into the kettle than it is into the fermenter??
I havnt personally checked my eff into the boiler, I just take an OG reading once its all in the fermenter with the volume, I dont even include the litre or two that gets left behind with the trub..
Yep exactly, I can hit my numbers or get very close into the boiler. But once I get into the fermenter I've dropped a couple of points. Not sure if I'm using too much water or leaving too much shit behind in the kettle. The last brew I did I got higher efficiency from the mash than usual because of the using less water we talked about. Then I got my boil volume up to planned amount through sparging. Once I got to fermenter I was slightly higher gravity reading but was 2L under planned! I thought about topping up but like the idea of a stronger bo pils so left it as is!
It could be all the protein that is in the wort solution prior to boiling it all off and losing it to trub. I reacon it must make the wort more viscous making the hydrometer do funny things anyone kinda agree?
I'm sure the soluble protein would affect the gravity but I cant say I know by how much. Its never really mentioned anywhere so I would assume it was very little. unless we have just discovered something new about brewing...:)
It's funny that it's not mentioned anywhere - I've had a wort drop 10-20 points post boil, my grav dropped significantly after evaporation! Except for fly sparging, pre boil grav measurements seem to be meaningless