You'll find some information on the Quest Handbook here. https://www.dropbox.com/s/ovhoi0uga5uev ... 2.pdf?dl=0 It isn't specific to the quest and posits that one needs to interpolate between the roast points for your particular roaster (1C start, 1C end, 2c start 2C end), as already suggested. There's a table in the last annex, which I used all the time until I got to know my roaster really well. After you do a few dozen roasts, if you keep a log, you'll soon enough know when to drop. Note also the importance of profile and, especially, charge temperature. You could drop two roasts at exactly the right temperature and have totally different taste if different profiles are used through the roast. Charge temperature is particularly important, as charging at too high a temperature can lead to a rather nasty, ashy, aftertaste in the coffee (IE a *bucks roast ).

lagoon wrote:Depends a bit on the beans, but I generally keep it in a pretty tight range between 212 and 218C. Rarely go over 220.

What is your typical first crack temp? Mine's pretty consistent at 211C on the ITBS of my Bullet except for Liberica which roasts like no other bean, needs a much lower pre-heat temp to keep it from getting away from me and hit first crack at 216C yesterday.

Thanks, yeah, that's the temp at the start of first crack for me, it seems to read higher than other users but it's very consistent.

I've found this useful: https://docs.google.com/spreadsheets/d/ ... edit#gid=0
Keep in mind a bean thermocouple measures the temperature of the bean thermocouple (not the coffee beans directly) and thermocouple size, placement, batch size, etc. have large effects. (which is why the Bullet IBTS is so great)