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  1. #1
    Live Fast wave15stx's Avatar
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    What's the minimum fuel pressure vt1100 injectors need?

    Wondering what the minimum fuel pressure vt1100 need to work properly


  2. #2
    44 lbs more than your max boost in the intake.

    Stock, 44 + about 10 or about 54 PSI in the fuel rail

    Somewhat modified and making about 15 PSI boost

    44 + 15 = 59 PSI in the rail.

    Anything below these numbers and you start running into problems.

    Hope this helps
    Last edited by whittlebeast; 04-19-2015 at 11:12 AM.

  3. #3
    boost junkie skidoochris's Avatar
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    to know the exact amount they would have to be flow tested
    but the safe number is 43psi

  4. #4
    Live Fast wave15stx's Avatar
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    I notice a differnce in the way the ski runs under 48 psi fuel it surges threw out the powerband

  5. #5
    Live Fast wave15stx's Avatar
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    Quote Originally Posted by whittlebeast View Post
    43 lbs more than your max boost in the intake.

    Stock, 44 + about 10 or about 54 PSI in the fuel rail

    Somewhat modified and making about 15 PSI boost

    44 + 15 = 59 PSI in the rail.

    Anything below these numbers and you start running into problems.

    Hope this helps
    ok makes sense data logger will be here Monday I will set at 60 psi and see what's going on because I cannot achieve the Afr I need without above 45 psi fuel pressure

  6. #6
    The most interesting man in the world. Nils888's Avatar
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    Quote Originally Posted by wave15stx View Post
    Quote Originally Posted by whittlebeast View Post
    43 lbs more than your max boost in the intake.

    Stock, 44 + about 10 or about 54 PSI in the fuel rail

    Somewhat modified and making about 15 PSI boost

    44 + 15 = 59 PSI in the rail.

    Anything below these numbers and you start running into problems.

    Hope this helps
    ok makes sense data logger will be here Monday I will set at 60 psi and see what's going on because I cannot achieve the Afr I need without above 45 psi fuel pressure
    Tuning buy changing fuel pressure is not the way to do things when you have a ECU that you can tune.

  7. #7
    hkss's Avatar
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    Is it right, that every fuel injektor need 44lbs. The stock one also. Isn´t it so?

  8. #8
    Most are rated at 43.5 PSI

  9. #9
    The tunes for vt11 are made for 58 psi static fuel pressure .

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