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Thread: losing fuel pressure ?

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  1. #1
    Join Date
    May 2007
    Location
    Oshkosh, WI
    Posts
    116
    RC Fuel Injection

    Per this calculation, not knowing your numbers exactly.

    Here is what I put in:
    600HP
    8 Injectors
    .575 BSFC
    .70 Duty Cycle
    43.5 psig

    It returns:
    61.96Lb/hr
    651cc/min

    My choice would probably be 60's. If your fuel pressure regulator is not boost referenced I would probably upgrade that as well. This will allow you to set your fuel pressure at 45ish without boost and under boost it will increase 1:1 for every psi. RC

  2. #2
    Join Date
    Jun 2007
    Location
    saratoga springs ,new york {upstate ,adirondacks }
    Posts
    1,878
    Quote Originally Posted by richardacampbell View Post
    RC Fuel Injection

    Per this calculation, not knowing your numbers exactly.

    Here is what I put in:
    600HP
    8 Injectors
    .575 BSFC
    .70 Duty Cycle
    43.5 psig

    It returns:
    61.96Lb/hr
    651cc/min

    My choice would probably be 60's. If your fuel pressure regulator is not boost referenced I would probably upgrade that as well. This will allow you to set your fuel pressure at 45ish without boost and under boost it will increase 1:1 for every psi. RC
    by boost referenced do you mean the vaccuum line on it ?i do have that but allen said i dont need it .if so were do i run the vacc.from ?just a regular vac off the intake?thanks.let me know please its not working right i know it the pump is making all kinds of low and high noises.
    mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .

  3. #3
    Join Date
    Jun 2007
    Location
    saratoga springs ,new york {upstate ,adirondacks }
    Posts
    1,878
    Quote Originally Posted by ramsey rider View Post
    by boost referenced do you mean the vaccuum line on it ?i do have that but allen said i dont need it .if so were do i run the vacc.from ?just a regular vac off the intake?thanks.let me know please its not working right i know it the pump is making all kinds of low and high noises.
    o also how do i kow if i spend the money on inj.if there going to be to big and is there such a thing ,would i be chancing it ?or is there math to knowing if there going to be too big?thanks again
    mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .

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