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Thread: Injectors & MAP Sensor for GPEC2a Twin Turbo 5.7 Hemi Build

  1. #1
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    Injectors & MAP Sensor for GPEC2a Twin Turbo 5.7 Hemi Build

    Hi everyone,

    Im working on a twin turbo setup for my Dodge Ram 1500 with the 5.7 Hemi (GPEC2a ECU) and need help choosing the right fuel injectors and MAP sensor. Here my current setup:
    - Stock 5.7 Hemi
    - Twin Pulsar G30-770 turbos (targeting ~10 psi boost)
    - Fuel: Pump gas 93 octane
    - Goal: Reliable 550-650 WHP for street use

    the question is what fuel injectors i should use and map sensor? stock sensor reads max 110kpa

    Thanks.
    Last edited by B8B8B8; 02-17-2025 at 01:47 PM.

  2. #2
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    1000cc FIC injectors and a 3bar map sensor from high horse. This will do great for what you are doing and give you room to grow in the future.

  3. #3
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    I think 1000cc injectors are little bit big. After a short calculation for your application, 775cc injectors from FIC should be more than enough, they can support up to 770hp to the wheel with a 80% duty cycle.
    Technically a 2 bar map should be enough as well but 3 bar will work if you want to get more boost in the future
    Last edited by Nycamar; 03-02-2025 at 10:34 AM.

  4. #4
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    isn't that you in that other thread not knowing how to write injector data?

    and you are over here giving advice...

    checks out lol

  5. #5
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    Not really sure what this has to do with the other one.
    I used the calculator on FIC. They will pretty much tell you how much HP the injectors can support.
    I?m asking a question about the scaling.
    And he is looking for 10 PSI boost what is with the atmospheric pressure 1.7 bar.
    But well, you not giving much help on the other one either, just smart comments. A Forum is here to help and not ?well give it a shot??
    Just my two cents.

  6. #6
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    you are referring to the internet

    people can say whatever they want to

    parts get overrated to boost sales

    parts get under-rated to boost sales

  7. #7
    Quote Originally Posted by Nycamar View Post
    I think 1000cc injectors are little bit big. After a short calculation for your application, 775cc injectors from FIC should be more than enough, they can support up to 770hp to the wheel with a 80% duty cycle.
    Technically a 2 bar map should be enough as well but 3 bar will work if you want to get more boost in the future
    if you know what youre doing 1000cc are not to big for the setup.

  8. #8
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    I am just installing some 1000cc FICs in my 2019 ram 1500 with a Magnuson TVS 2650 and these injectors were recommended to me, I think they are a good option

  9. #9
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    yeah...

    i am pretty confident of my choices before the install too

    : )

    be sure to post a dyno sheet and your log/tune

  10. #10
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    FIC1000 is an overkill for your target. But again they are cheape then ID's

    That power range you're good with 850cc, but again price difference is not worth the upgrade.

    Plus, having the bigger injector is better just in case you decided to push it more in the future.

    I just did 833 whp 67% injector DC.
    FIC1000
    Pump 93 with a can of octanium

    2 bar or 3 bar map sensor from dodge caliber SRT4 you can copy and paste the injector data from a stock dodge caliber file