Fuel Pressure ?

Discussion in 'Ford, Lincoln and Mercury' started by 94Stang, Jul 18, 2015.

  1. 94Stang

    Hi people. New guy and I'm new to boost. I have some questions about buying and setting up my fuel system for boost.

    If I am running 12-12 lb of boost, on a 4.6L, what size injectors should I go with? Also what is the rule of thumb of what base pressure should be compared to boost? So if boost is 6 lbs what should the minimum be verses 12 lbs, 14, etc.?
     
    94Stang, Jul 18, 2015
    #1
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  2. vinces427bb Staff Member

    welcome to the site
    carbs are easier = base+1:1 increase in fuel pressure-to match increased boost pressure

    your question on EFI is more complex;
    do you have an FMU??
    the injector size, fuel pump, fuel pressure and boost are some of the variables that need to be looked at ...:blackalien:
     
    vinces427bb, Jul 19, 2015
    #2

  3. vinces427bb Staff Member

    vinces427bb, Jul 19, 2015
    #3

  4. 94Stang

    Right now I have a stock car and I'm trying to figure out what I need to get. I'm will put this together from used parts when I find them because I can't afford a new kit. Can the stock computer from a 94 work? Sorry about the title, ? I found this place from YB. Someone took it off the title?
     
    94Stang, Jul 19, 2015
    #4

  5. SCF/HAIC Staff Member Admin

    There are no hard set numbers, but I generally like a tune to have base pressure at least 30 psi over - 40-60 over if it's very high RPMs so you can have a short injector pulse width deliver enough fuel.
     
    SCF/HAIC, Jul 20, 2015
    #5

  6. 94Stang

    Thanks guys.
     
    94Stang, Jul 24, 2015
    #6

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