buzzmc wrote:When does the clock start? When you flip the lever, or when you start to see espresso falling in the cup? Sad to admit if my timing's off, since I've always timed shots from beginning of flipping the lever.
I've always used pump start time (Timing of espresso extraction starts when? and its redux elaborate). For the SCAA barista competitions, the rule is 20 to 30 seconds from the time the pump starts. For ristrettos, the guidelines are extended around 10 seconds. Given differences in personal taste profile preference and given that some espresso machines have long dwell times (E61s are around 5-7 seconds) and some have practically none (La Marzocco, Elektra), these recommendations should be tweaked as needed.
For what it's worth, I rarely time an espresso pour. I can estimate ~25 seconds with enough accuracy without a stopwatch, and besides, I would cut off the extraction if it showed signs of blonding independent of the elapsed time. I would only worry about it if an apparent longer/shorter timing was confirmed by an off balance taste (e.g., sourness -> too fast pour, edgy -> too slow pour).




