boost_junky

Im just wondering about the needle valvle setup if i hook up a oil gauge after the valve and adjust the pressure to let say 20psi will it matter if im using a stock banjo fitting flared to the hose?Will this drop the pressure more cause it uses a small hole in the banjo fitting?Cause ive done to set's of oil seals on my turbo ,My oil pressure is 90psi at idle with HPR 40w oil.