Oil pressure line

Discussion in 'Race 400/430/455' started by St494, Sep 10, 2017.

  1. St494

    St494 New Member

    Hey there.i was wondering if it is common to get a lower pressure reading with a smaller diameter feed line to the gauge.replaced the blown line with one of the mailhouse brands and for whatever reason,it is much smaller than the one i replaced.i read about 15 psi at idle now compared to 30 plus before.i do have the adjustable regulator on the pump also.
     
  2. flynbuick

    flynbuick Guest

    Make sure that you do not use plastic line.
     
  3. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Be more specific, what line did you have before? The best line to use for a mechanical gauge is either the copper line or braided -4AN.
     
  4. St494

    St494 New Member

    It's -4an.same size fittings but smaller hose.
     
  5. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    I suppose if there is air in the line, it might change the readings. You can try bleeding it.
     
  6. flynbuick

    flynbuick Guest

  7. Rob Ross

    Rob Ross Well-Known Member

    No, pressure is pressure. The smaller line will change how fast the gauge responds to the change in pressure. The differences noted above probably have more to do with a bad test and unknown oil temp with the readings were taken.
     

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