Does any one have a straight answer to what fuel psi to run with the VP44?

I just installed a new lift pump and it's set at 22b. When truck is off 19 at idle and it drops as low as 7 at WOT.

As far as I know the truck is stock besides for a edge juice and a raptor 4G 100GPH lift pump.

Should I turn it down or is 7 psi too low at WOT. Could this be that there are bigger then stock in the truck?