455 acceptable idle oil pressure

Discussion in 'Street/strip 400/430/455' started by "66 Special 455, Oct 20, 2012.

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  1. LARRY70GS

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

    You can't evaluate it properly then. Just running it up to coolant operating temperature is not enough. Oil temperature will lag behind coolant temperature. You have to drive the vehicle.
     
    LARRY70GS, Mar 11, 2023
    #41
    446370 likes this.
  2. GermanTom

    GermanTom Member

    I will. But if i understand right the 40 psi wont damage anything
     
    GermanTom, Mar 11, 2023
    #42
  3. LARRY70GS

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

    Correct.
     
    LARRY70GS, Mar 11, 2023
    #43
    446370 likes this.
  4. Max Damage

    Max Damage I'm working on it!

    Are you saying you did a compression test and you are lacking compression?

    Your bearings must still be in good shape to produce that kind of oil pressure...
     
    Max Damage, Mar 11, 2023
    #44
  5. Guy Parquette

    Guy Parquette Platinum Level Contributor

    All great info Devon. But cylinder pressure is at its highest at idle. Bleeds off as engine rpm increases. Centrifugal force is the working oil problem.
     
    Guy Parquette, Mar 11, 2023
    #45
  6. Schurkey

    Schurkey Silver Level contributor

    Of course not.

    Cylinder pressure is low at idle, increases with throttle opening and load. Highest at torque peak RPM and WFO throttle.

    Huh?
     
    Schurkey, Mar 12, 2023
    #46
  7. Bad Buick

    Bad Buick Foe Fiddy Five

    Bad Buick, Mar 26, 2023
    #47
    TimR and Mark Demko like this.
  8. Mark Demko

    Mark Demko Well-Known Member

    Mark Demko, Apr 30, 2023
    #48
    TimR, Brian Albrecht, FLGS400 and 3 others like this.
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