Hi , i have read a couple of threads in this forum and read strive for tone articles regarding low pressure and low water debit. However i am a relatively amateur home barista and need help extraction the best flavors of coffee possible. So far after dialing down to 6 bars, the taste has declined in comparison with ( 9 bars, 0.6mm pulling for 33s ). My question is , for those who have played with 6 bars 0.6mm what is your usual brewing ratio and time? To get my 1:2 ratio i am pulling close to 45-48 seconds... with the coffee only starting to drip at 10s. My current water debit is 240ml/30s. i still get underextracted ,slight sour coffee at this timing . I dose 18 grams,10kg Eazytamp pressure+ mythos one grinder. Should i raise the pressure to get 250ml/30s? Also,do we essentially get better flavors running on 6 bars , or do we drop to 6 bars so that we can get the flow rate as close to 250ml/30s?
On another notes, my espresso has good crema and tiger stripping but it has some bubbles( IS this due to the water i am using?)
Thank you in advance for the responses.