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Precision Sport Compact Mitsubishi 1000cc Injector

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  • Precision Sport Compact Mitsubishi 1000cc Injector

    hi,

    what injectors do i choose for Precision Sport Compact Mitsubishi 1000cc low impedance injectors.

    regards,

    Jihan

  • #2
    Good day,

    Do you have any data with respect to the injector latency (battery compensation/dead time values)? I myself am not sure if there's an injector from that available listing which is compatible based on core used and flow ratings. What model ECU are you using? I don't think this was mentioned.

    Cheers!
    Damien King
    Technical Analyst/Engine Management Calibrator
    Stephen's Automotive Research & Development Engineering

    Comment


    • #3
      Hi,

      Thank you for your reply. im using an SMC V1.99.

      Regards,

      Jihan

      Comment


      • #4
        They look very much like a Delphi 17113744
        He gets his lap dogs to do his talking for him. Buzzard is a good example.

        Comment


        • #5
          I had a look on what I am assuming is the injector manufacture website (shop.precisionturbo.net) but oddly enough I didn't see an available download stating the flow rating for various base (differential) fuel pressure applied to the injector nor did I see any injector latency data post. Some manufacturers take this sort of information as proprietary, meaning that it's only available to dealers to support customer or only available to customer who buy directly from them as in this case where the manufacturer in question are open to direct retail.

          My advice would be to seek assistance from a dealer concerning the injector data needed, however, if that alternative isn't feasible for you for what ever reason then there are a couple options open to you. The Aubert Electronics office in Australia will test the injectors in question to gather the necessary data the fuel model needs to correctly and accurately operate the injector. Also, as Chris has indicated, the core used looks very familiar. And chances are there may be an injector driver within the latest release of the SMC software which may be a close enough match to the injectors themselves.

          With the latter, you may have a few downsides to contend with. Nothing terrible or problematic, just a few things you have to understand. Because the injector data used will be close but not exact then you can expect the values of the fuel table to be a odd even though the engine runs great! This is because the fuel model is calculating fuel flow based on slightly inaccurate data, if the engine calibrator understands this well enough you won't see much of any downsides to the behavior of the engine itself. You might also see a slightly awkward graphical representation of the fuel table values. Once again, these aren't serious problems or problems which can hurt your engine, but the calibrator must keep the inaccurate injector data in mind.

          What's really amazing about the brand of ECU you chose to work with is the fact that the fuel model used is by far one of the most comprehensive solutions you will find on the open market today. And in saying this you won't have the terrible headache your situation poses with the very sensitive millisecond fuel equations which was traditionally used by most other ECU brands. To calibrate the fuel table within an Autronic ECU is to match the air flow or Volumetric Efficiency (how well the engine is able to full itself) of the engine, that's all, so even if your injector data isn't spot on correct then you will still be able to achieve the primary objective. The downsides may only present as eye sores when you look at the fuel table or if you keep a watchful eye on the lambda meter, if this is the case with you then it will be more bothersome than it needs to be. Also, if you try to look at the fuel used in an effort to reverse calculate the air flow and/or air mass passing through the engine then you'll see that something or somethings are off.

          Of course, the flip side of having accurate injector data you can depend on make calibration duties that much easier as the fuel model will do exactly what it is supposed to do. The time taken for a complete calibration can be considerable less in comparison. This will always be my advisory, however, if the ideal isn't achievable then you can still have great results nevertheless. My apologies for the long winded response but I sure hope that you have a better understanding of your given screnario. Please feel free to ask follow up questions concerning the specific injector data which is needed or any other aspect of your scenario and either myself or one of the other member will respond to you accordingly.

          Cheers!
          Damien King
          Technical Analyst/Engine Management Calibrator
          Stephen's Automotive Research & Development Engineering

          Comment


          • #6
            Make sure the ECU injector drivers are appropriate and also that the injector ballast resistors are removed if fitting to a Mitsubishi wiring loom.

            Comment


            • #7
              this was Richards reply to me
              "Jihan,

              We have previously tested a Precision Injected 1000cc injector. If this is your injector type proceed as follows.

              Using the Laptop program select injector type = “USER DEFINED”. Then make the following settings:

              A = 1393900
              B = 27
              C = -816
              D = 711
              E = 562

              These injectors require high current injector drivers (4 Amp Peak / 1 Amp Hold) . Therefore your ECU MUST have a serial number ending in “…………..A4”.
              Late model SMC ECUs can be changed from low to high current without returning the ECU to Autronic for modification.
              " can some one please explain the above highlighted or how it could be done?

              Comment


              • #8
                Which ECU do you have, a standalone SMC or an EVO PnP?

                Comment


                • #9
                  SMC EVO Pnp

                  Comment


                  • #10
                    Any help guys

                    Comment


                    • #11
                      Originally posted by Jihan30 View Post
                      this was Richards reply to me
                      "Jihan,

                      We have previously tested a Precision Injected 1000cc injector. If this is your injector type proceed as follows.

                      Using the Laptop program select injector type = “USER DEFINED”. Then make the following settings:

                      A = 1393900
                      B = 27
                      C = -816
                      D = 711
                      E = 562

                      These injectors require high current injector drivers (4 Amp Peak / 1 Amp Hold) . Therefore your ECU MUST have a serial number ending in “…………..A4”.
                      Late model SMC ECUs can be changed from low to high current without returning the ECU to Autronic for modification.
                      " can some one please explain the above highlighted or how it could be done?
                      Hello, please tell me the method of calculation, if I have all the necessary data for their injectors?

                      Comment

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