The oil flow through the bypass filter is regulated by a small hole on the hollow tube inside the housing. I believe it's about 1/16" dia.
Maybe a previous owner made yours larger to get 'better filtering'.
Flow is always as good as the smallest opening in the system allows, unless the filter is clogged.
If I plug the bypass filter on my 235, there is no change in oil pressure.
But it's not new and never gets up higher than 35 lbs. hot with SAE 30.
Quality full flow filters keep particles larger than 15 microns away from main bearings.
Some bypass filters clean the oil down to fractions of 1 micron.
Both together are ideal. None keeps particles of any size suspended in detergent oil until it is drained.
