BTW, an old hand told me, when starting off with an all-grain mash using
flaked maize or any other pre-cooked grain, you should begin with 1kg dry grain to 1 gallon (5 litres) of water at
90oC.
This is because, in flaked grains, the starch has already been cooked and rolled to release the starches and all you need to do is reconstitute the starch with near boiling water. For normal grain mash the water temp would be much lower to start so as not to kill the enzymes in the grain.
However, I found by hard experience, that if you're using flaked maize in particular, you should up that ratio to 1kg to 7 litres of water. The resulting Wort is likely to be more manageable as it is less likely to set completely solid before you can add the enzymes.
Once the Mash has gelatinised and cooled to around 67
oC you should add a further 3 litres of water per Kg of dry weight grain, also at 67
oC, to thin the mash. This will ensure all the grain starch is dissolved and suspended in the mash ready for the enzymes to convert to fermentable sugars.
Then when you add the malted grains the enzymes will have an easy job to do
AM
