I would adjust it down to around 70psi cold.
Food for everyone's thought.
Don't mistake the adjustable bypass for a pressure regulator. It will lower cold oil pressure yes but will not raise hot idle pressure.
When cold starting any motor 90% of the oil is diverted through the bypass. The cheaper and more restricted the oil filter the more oil gets bypassed. Why? Because when oil is cold it can't pass through the filter and has to bleed off somewhere. ................My $.02
I just want to add my comments and opinion in this discussion based upon many years of dealing with Buick engine oiling starting with Buick engines before the turbo days.
It is not unusual for oil pressure of 80-90 psi when starting an engine on a " cold" day here which is 30-40 degrees, and about 35-50 psi at operating temp.
The issue I did have with these cold start oil pressures, the paper-type cartridge filter would collapse, or at least develop "tracks", or wide openings to allow oil to flow which means it is not filtering some oil even with the by-pass closed?
Some of the more expensive filters have a very fine media which actually restricts oil flow, and filtering oil down to 8 microns is counter-productive. I prefer to have more oil flow and pressure.
The Wix filter for example has a 60 micron media, which is adequate for protecting bearings and other parts.
Also, the cleanable filters use a 40 micron stainless steel mesh screen with NO bypass, and this is what we prefer to use especially to protect our expensive performance builds.
Our testing has shown an increase up to a 10 psi oil pressure across the entire RPM range with the mesh filter, which in our builds is 80-90 psi at high RPM.
I have well over 1000 passes in my race car over the years and never trashed a main bearing, and has fresh bearing every season.
