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  1. #1
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    Polaris Fitch dfi injector flow rates

    Anyone know what it is and if the threads/attachments are the same as the kawi system?

    Thanks

    Sean


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    The Polaris Ficht injectors 2000-2004 are individually flow mapped. The 'compensation table' flow map for each injector is encoded into the EMM.

    The 1999 Polaris Ficht injectors did not use individual flow maps, they were all manufactured to the same precise flow tolerances.

    I do not have any data on how the Polaris Ficht injectors compare to those used on the Kawasaki DI engines.

  3. #3
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    Interesting, they are 12v triggered though?

    Sean

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    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by smokeysevin View Post
    Interesting, they are 12v triggered though?

    Sean
    Ficht RAM injectors are completely different from typical automotive or 4-stroke watercraft injectors. They are powered by 45 volts with high energy pulses. Effectively each injector is itself a high pressure fuel pump. Injection pressures are several hundred PSI, going from memory.

    The electrical system puts out almost a kilowatt, much of which is used to power the fuel injection system.

  5. #5
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    Got it. I think the stx di uses a standard efi fuel pump.

    Sean

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    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by smokeysevin View Post
    Got it. I think the stx di uses a standard efi fuel pump.

    Sean
    The fuel pump in the fuel tank is just there to flow the fuel through the Ficht injectors, with modest flow pressure. Then the injectors themselves use an internal second stage RAM fuel piston to highly pressurize the fuel and force it directly into the combustion chamber. The injector piston is powered by the high voltage DC system.

    The tip of the Ficht fuel injector is exposed to the full heat and violence of the combustion process

  7. #7
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    Got it, I wasnt sure if it was a di system with a lift pump like audi, Vw, and mini usethabks for clarifying

    Sean

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