I have been making espresso at home for more than a year, I just "upgraded" to an IMS basket and bottomless portafilter.
I cannot get my espresso to come out like it used to. I have a 20/22gr basket, I am putting in 18 grams, and WDT, then use a distributor no tamp.
It comes out pretty good at first then I get the dreaded spurts out the sides, and fills my shot glass in about 15 seconds. What is going on? Do I need more coffee in that basket since it is a 28mm and it for 20/22 grams? Or is it something in my distribution?
Also it is quite sour, so underextracted for sure.
Thanks for your help,