I just watched a Brewing TV epsiode on brewing-in-a-bag (BIAB). They took 7lb (3.2KG) of grains, and 5 US Gallon (19 Litres) of water. After mashing they had 4 US Gallons (15 Litres) of 1.052 gravity wort. After a 60 minute boil they had 3 US Gallon (11 Litres) at 1.060 gravity to ferment.
I have never tried brewing with grain so would like to give it a go. However I live in a small apartment and only have a 5 litre cooking pot. Would scaling this down to just 21% of the batch size work? (i.e. 660 grammes of grain and 4 litres of water - probably yielding only 2.4 litres of 1.060)
I was also thinking, to speed the cooling and increase the batch size I could dilute the batch with cold water to get about 3.5 litres at 1.042.