Is this oil pressure ok?

Small Block Mopar Engine

  1. MoparMark91

    MoparMark91 Well-Known Member

    Messages:
    511
    Likes Received:
    155
    Joined:
    Jun 22, 2018
    Location:
    CA
    Local Time:
    2:10 PM
    Hey guys took a picture of my oil pressure at idle of 800 or so at red light? Is this okay for after engine had been been built? I was always told 1000= 10psi rule?

    I know it's at a angle but it's right on that line between the 0 and 25

    If I put it in neutral it gains a few psi at a stop

    PXL_20200927_011458487.jpg
     
  2. Jadaharabi

    Jadaharabi FABO Gold Member FABO Gold Member

    Messages:
    7,708
    Likes Received:
    8452
    Joined:
    Jan 8, 2016
    Location:
    Peoria, Illinois
    Local Time:
    4:10 PM
    16013388322224793097132256048173.jpg
    Straight from the manual for the 73 318 + 340 minimum pump pressure at idle 8 PSI. Operating pressure at 2000 engine RPM 30-80 lb.
    Pressure drop resulting from clogged filter 7-9 lb.
     
    • Agree Agree x 3
    • Like Like x 1
    • 512Stroker

      512Stroker We are all here because we are not all there.

      Messages:
      1,799
      Likes Received:
      1258
      Joined:
      May 30, 2016
      Location:
      Freedom, MO
      Local Time:
      4:10 PM
      Is the oil hot or cold when you took the picture?
      What weight oil?
      That looks low have you checked that gauge against another oil pressure gauge?
       
      Last edited: Sep 28, 2020
      • Like Like x 1
      • Jadaharabi

        Jadaharabi FABO Gold Member FABO Gold Member

        Messages:
        7,708
        Likes Received:
        8452
        Joined:
        Jan 8, 2016
        Location:
        Peoria, Illinois
        Local Time:
        4:10 PM
        12 PSI at 800 RPM is better than 10 psi at 1000 RPM.
        What is your pressure at 2000 RPM?
         
        • Agree Agree x 2
        • Like Like x 1
        • MoparMark91

          MoparMark91 Well-Known Member

          Messages:
          511
          Likes Received:
          155
          Joined:
          Jun 22, 2018
          Location:
          CA
          Local Time:
          2:10 PM
          Hot oil fully warmed up at the light
           
          • Like Like x 1
          • MoparMark91

            MoparMark91 Well-Known Member

            Messages:
            511
            Likes Received:
            155
            Joined:
            Jun 22, 2018
            Location:
            CA
            Local Time:
            2:10 PM
            Anything above 1500rpm I'm pushing past 50psi

            The oil pressure increases really fast if it's anything off idle
             
            • Like Like x 3
            • Jadaharabi

              Jadaharabi FABO Gold Member FABO Gold Member

              Messages:
              7,708
              Likes Received:
              8452
              Joined:
              Jan 8, 2016
              Location:
              Peoria, Illinois
              Local Time:
              4:10 PM
              Drive it.

              How about increasing the idle to 1000.
               
              • Agree Agree x 3
              • Like Like x 1
              • Craig Burriss

                Craig Burriss Well-Known Member

                Messages:
                322
                Likes Received:
                247
                Joined:
                Aug 30, 2017
                Location:
                Statesboro Georgia
                Local Time:
                5:10 PM
                Sounds fine to me. If it makes you nervous you could always go up a thickness in oil
                 
                • Agree Agree x 5
                • MoparMark91

                  MoparMark91 Well-Known Member

                  Messages:
                  511
                  Likes Received:
                  155
                  Joined:
                  Jun 22, 2018
                  Location:
                  CA
                  Local Time:
                  2:10 PM
                  Also am running 10w40

                  If I put it to 1000 then it sits at about 35-45 I would say? I feel like I'm fine but just getting second opinion
                   
                  • Like Like x 4
                  • Jadaharabi

                    Jadaharabi FABO Gold Member FABO Gold Member

                    Messages:
                    7,708
                    Likes Received:
                    8452
                    Joined:
                    Jan 8, 2016
                    Location:
                    Peoria, Illinois
                    Local Time:
                    4:10 PM
                    Have you tried it with 15 - 40?
                    What if you set the idle at 900?

                    You've got plenty of Cam in that motor it wouldn't hurt it a bit.
                     
                    • Agree Agree x 1
                    • MoparMark91

                      MoparMark91 Well-Known Member

                      Messages:
                      511
                      Likes Received:
                      155
                      Joined:
                      Jun 22, 2018
                      Location:
                      CA
                      Local Time:
                      2:10 PM
                      That's true I'll look at it some more them I get home from work
                       
                      • Like Like x 1
                      • Mattax

                        Mattax Just the facts, ma'am FABO Gold Member

                        Messages:
                        11,169
                        Likes Received:
                        7062
                        Joined:
                        Feb 7, 2013
                        Location:
                        Phila. Pa
                        Local Time:
                        5:10 PM
                        20 is plenty at idle.
                        The important thing is that it rises with rpm.
                        does it keep rising above 1500 rpm? How far?
                        if 10W-40 gets it to keep rising with higher rpms thats good.
                        If its topping out at 50 psi at 1500 rpm then I'd go with the 10W 30 or straight 30 and to try to get pressure to follow the rpms a little higher.
                         
                        • Like Like x 1
                        • Agree Agree x 1
                        • oldkimmer

                          oldkimmer FABO Gold Member FABO Gold Member

                          Messages:
                          16,533
                          Likes Received:
                          4899
                          Joined:
                          Nov 11, 2006
                          Location:
                          Kindersley, Saskatchewan,
                          Local Time:
                          4:10 PM
                          Usually what I’ve found with lower oil pressure at idle is cam bearing problems. Possibly it’s in the oil pump itself. I know they say ur pressure is ok at idle but to me it isn’t. Especially on a cammed up motor. Kim
                           
                          • Agree Agree x 4
                          • MoparMark91

                            MoparMark91 Well-Known Member

                            Messages:
                            511
                            Likes Received:
                            155
                            Joined:
                            Jun 22, 2018
                            Location:
                            CA
                            Local Time:
                            2:10 PM
                            So your saying I should be a lot higher pressure at idle and it could be my cam bearings?
                             
                          • oldkimmer

                            oldkimmer FABO Gold Member FABO Gold Member

                            Messages:
                            16,533
                            Likes Received:
                            4899
                            Joined:
                            Nov 11, 2006
                            Location:
                            Kindersley, Saskatchewan,
                            Local Time:
                            4:10 PM
                            Yupper. What is ur rod and main bearing clearances? Kim
                             
                            Last edited: Sep 28, 2020
                          • RustyRatRod

                            RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

                            Messages:
                            64,725
                            Likes Received:
                            37693
                            Joined:
                            Jun 7, 2010
                            Location:
                            Georgia
                            Local Time:
                            5:10 PM
                            What post #2 says. I've never in my LIFE seen a spec given at idle. NEVER. That manual up there ^^^^ is the first time I've ever seen an idle spec and yours is WAY over that. If there's enough pressure to keep the light out, or push the needle up as high as yours, you're good. The spec is almost always given at 2000 RPM. You need not concern yourself with any other spec. Stop worrying about a problem you do not have.
                             
                            • Agree Agree x 2
                            • harrisonm

                              harrisonm Well-Known Member

                              Messages:
                              2,808
                              Likes Received:
                              2731
                              Joined:
                              Jan 16, 2005
                              Location:
                              Topeka, KS
                              Local Time:
                              9:10 PM
                              Look at it this way, if your engine blows up due to low oil pressure, you have a great excuse for that stroker engine you always wanted.
                               
                            • Jadaharabi

                              Jadaharabi FABO Gold Member FABO Gold Member

                              Messages:
                              7,708
                              Likes Received:
                              8452
                              Joined:
                              Jan 8, 2016
                              Location:
                              Peoria, Illinois
                              Local Time:
                              4:10 PM
                              It is a stroker motor. It has a 3.58 crank in it and it's a 340 block.
                               
                            • cudamark

                              cudamark FABO Gold Member FABO Gold Member

                              Messages:
                              7,239
                              Likes Received:
                              479
                              Joined:
                              Mar 14, 2009
                              Location:
                              San Diego
                              Local Time:
                              2:10 PM
                              First, I would verify the oil pressure by using a known good quality gauge and not just rely on the aftermarket one. If it's accurate, I would be a little uneasy. It seems a bit low to me.
                               
                              • Agree Agree x 2
                              • Like Like x 1
                              • MoparMark91

                                MoparMark91 Well-Known Member

                                Messages:
                                511
                                Likes Received:
                                155
                                Joined:
                                Jun 22, 2018
                                Location:
                                CA
                                Local Time:
                                2:10 PM
                                So I haven't had a chance to put my oil pressure tester on it to first check if guage is reading accurate but that will be the first thing I do. I do also have a gallon of either vr1 20w50 or lucas 10w40. Should I stick with Lucas or go vr1?
                                 
                              • 512Stroker

                                512Stroker We are all here because we are not all there.

                                Messages:
                                1,799
                                Likes Received:
                                1258
                                Joined:
                                May 30, 2016
                                Location:
                                Freedom, MO
                                Local Time:
                                4:10 PM
                                Oil viscosity is determined by crank and rod bearing clearance's.
                                 
                                • Agree Agree x 2
                                • MoparMark91

                                  MoparMark91 Well-Known Member

                                  Messages:
                                  511
                                  Likes Received:
                                  155
                                  Joined:
                                  Jun 22, 2018
                                  Location:
                                  CA
                                  Local Time:
                                  2:10 PM
                                  Well I am .0025 I believe across the board on crank and .0020 on rods
                                   
                                  Last edited: Oct 13, 2020
                                • oldkimmer

                                  oldkimmer FABO Gold Member FABO Gold Member

                                  Messages:
                                  16,533
                                  Likes Received:
                                  4899
                                  Joined:
                                  Nov 11, 2006
                                  Location:
                                  Kindersley, Saskatchewan,
                                  Local Time:
                                  4:10 PM
                                  Then u need at least 15/40 20/50 would work also. Kim
                                   
                                • Mattax

                                  Mattax Just the facts, ma'am FABO Gold Member

                                  Messages:
                                  11,169
                                  Likes Received:
                                  7062
                                  Joined:
                                  Feb 7, 2013
                                  Location:
                                  Phila. Pa
                                  Local Time:
                                  5:10 PM
                                • Jadaharabi

                                  Jadaharabi FABO Gold Member FABO Gold Member

                                  Messages:
                                  7,708
                                  Likes Received:
                                  8452
                                  Joined:
                                  Jan 8, 2016
                                  Location:
                                  Peoria, Illinois
                                  Local Time:
                                  4:10 PM
                                  Did you raise the idle or change the oil yet?
                                  Inquiring minds want to know.
                                   
                                  • Agree Agree x 1
                                  1. This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
                                    By continuing to use this site, you are consenting to our use of cookies.