Ok, am a bit confused over the best way to determine pressure on my Silvia. Here is some of the conflicting info I have seen:
-250ml per minute from the return pipe is about 9bar (never heard anyone say this is the correct rate for a V3, some say 400ml/min , some say 500ml/min because of the style pump it is being vibratory, some say the measurement doesn't simulate a shot because you use a blind filter, there is conflicting info of when to measure some say after 200mls has poured, and some say warm or cold machine makes a difference in the measurement)
-get a portafilter gauge (some say you must build one with a valve to simulate a shot, that a straight gauge to the portafilter can be off as much as 4bar). I feel building or buying one could be a waste if it is not a true measurement.
-install an isomac pressure gauge on the Silvia, I can't seem to find a comprehensive guide or package deal to accommodate such a mod and I surely do not want to 'play around' with that.
So I am not sure where to go from here, my return pipe is putting out 300ml minute, but something seems off with my pressure, the shots are disgusting (although I am still wrestling with other variables). I have a pro-barista showing up in a week for home training that should help but they do not own a pressure gauge or anything. Maybe a V3 Silvia owner who is happy with their shots can tell me what their return flow rate test produces?