When do you start to time the shot? - Page 2

[LaDan]

... On preinfusing E61 groups, it may take 7-8 seconds before the entire puck is saturated, and espresso droplets appear. This "dwell time" is 30% of the recommended pour time. On my Spaz S1V1 (rotary pump, no preinfusion) the dwell time is about half that, and the puck saturates 3-4 seconds sooner. ...

You always give me insights. Thank you for that!