LMSC How critical are the 30g pour and dry bed within 3:30 mins. Let’s say, I am going to brew 18g or 30g @60g/L? Thx
3:30 dry bed is not in any way critical. Both brews (so far) with this coffee and 2 different grinders gave me a dry bed at 3:25, but if your grind size is different, or your coffee is different, your time will be different - the coffee itself dictates the dry bed time (at similar grind & the same brew size/regime - time is the biggest variable). Broadly similar grind sizes & extractions have given me times of 3:24 to 3:48 accross different coffees (again, so far).
I don’t make drip brews with 18g with the drip assist (or drip brews at 30g with anything), if I was making 2 cups, I’d use 2 brewers. Pours take 10-15s each, so this is very doable.
60g/l - I don’t much like coffee brewed under 1.4% TDS as drip, So it’s not something I am going to explore. 60g/L is not a standard of anything, but since you asked: for 210g water 60g/L = 12.6g dose.
The thing that is critical, given the 30g pours, starting every 30s and taking 10-15s each, to 210g total, is the grind size, I am around 8-9% at 400 Kruve, or 20-22% at 600um with an ASTM/ISO sieve.
If I was finer, say 12% at 400 Kruve/30% at 600um, I’d be pouring 40g every 40s to 200g total, 2 pours inner, 3 outer.
(All sifting by hand for 2 mins with occasional side & downward taps, 10g in Kruve, 7g in 3″ 600um sieve).
Sorry to be so specific, but there isn’t a reliable way to extrapolate pour rates at any other brew size, without actually doing it. All I can say is, at the same grind setting, as brews get bigger, your pour rate will need to be faster.