I switch one of my bracket cars to a 1/4 inch oil pressure line from the standard 1/16 or 1/8 (CRS) with the same gauge, the bigger line made the gauge a lot more responsive to the oil pressure changes It changed with RPM just like the tach did
NHRA outlaw the bigger line shortly after I made that change I never changed it and was never question by 8 or 9 different track NHRA techs about it either