Hello, I tried to find the right water pressure for my system.
I'm having difficulties with the upstair toilet. When we flush, we get a trumpet sound out of the toilet or pipe?
The water pressure is going lower as week goes by.
I have a shallow well, bleu pressure tank Flotec 82 gal. Pump 1/2 hp, RPM 3450 phase 1.
The pressure dial on the motor show between 32 and 66 psi.
What can I do to get better pressure and less noise.

The pressure dial on the motor show between 32 and 66 psi. What can I do to get better pressure and less noise.
How old is your home and what material are your water pipes?
The range of house PSI runs between 20 PSI low and 60 PSI for a high with the average being 45 PSI. You're at the top end now.
OR, Is this what the gage will measure and not your true pressure? Why don't you repost with more details.
As for your toilet sounding like Harry James and his trumpet shut the waster off and replace the ballcock. Good luck, Ton