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FIC 1000 Injector Limits

Discussion in 'Engine/Tuning' started by carguy96, May 15, 2021.

  1. carguy96

    carguy96 Active Member Established Member

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    I am putting together my motor to go back into my car.
    My setup is a Fore Level 2 system, twin 465 pumps, FIC 1000 injectors (they’re 95lb), comp cams (XE266BH-116 grind), a 2.8 KenneBell Mammoth blower with a 3.5 upper pulley and stock lower (for now) mid length headers, off road X-pipe, etc.

    I am trying to determine roughly what my limits are with these injectors.
    For now, I estimate I’ll make about 650ish whp on 93 octane on what I think is around 18-19psi. But I am thinking down the road if/when I switch over to E85 and want to run more boost, where is the limit with these injectors?
    I’m trying to decide if I should get some bigger ones for down the road.

    I guess to be clear, I’m not expecting to ever make some crazy Gen 5 Whipple numbers with this KB, just trying to find what my limits are with this setup.
     
    03' White Snake likes this.
  2. 03cobra#2

    03cobra#2 Hobbyist Of Many Hobbies Established Member

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    The FIC1000's will get you pretty far even on E85. I am running the same injectors with twin 465's high pressure version on 25lbs of boost. I am seeing about 90% injector duty cycle at the top of my pulls, running 55psi base pressure in my return system. Injectors are pretty easy to sell aftermarket, and the FIC1200's are pretty reasonable priced. I would say if you are going to run more than 20 lbs on E85 I would probably go to the 1200's to give you a bit of room.
     
    carguy96 likes this.
  3. 03' White Snake

    03' White Snake Well-Known Member Established Member

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    I have a standard inlet 2.8H, built motor at 10.3 CR, cams, 2 465 pumps ect. With Ford Racing 80's, 22 psi I made 785hp/702tq on corn. Base fuel pressure was set at 60 psi. I was at 95% duty cycle.

    I switched to ID1050X's, lowered the base pressure to 42 psi and make 823hp/767tq on 22 psi now.

    So the point is, with a higher base pressure, you can get over 800 rwhp with those injectors.
     
    Last edited: May 15, 2021
    carguy96 likes this.
  4. IllCobra

    IllCobra Active Member Established Member

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    I need to do more reading into this, but what is base pressure's correlation to power? And what duty cycle are you at with the ID1050Xs?

    OP, I've read that ID1000's are at 100% duty cycle at 1000whp, if the FIC1000 are the same then you should be good.
     
  5. 01yellercobra

    01yellercobra AKA slo984now Established Member

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    Base pressure doesn't correlate to power. Raising base pressure makes a smaller injector act like a bigger one. The ideal plan would be to run a larger injector instead of raising base pressure. But injectors aren't cheap and sometimes you just need that little extra.
     
    Last edited: May 16, 2021
    me32, IllCobra and 03' White Snake like this.
  6. IllCobra

    IllCobra Active Member Established Member

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    Gotcha!
    What are the cons to doing that though?
     
  7. 01yellercobra

    01yellercobra AKA slo984now Established Member

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    Pumps can only supply so much pressure. Starting with lower base pressure gives more room for the pumps to work. Say you're running a base pressure of 50psi and you're running 20lbs of boost. The pumps will need to be able to supply 70psi to overcome the boost pressure. If the pumps can only supply 65psi they won't keep up.
     
  8. IllCobra

    IllCobra Active Member Established Member

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    Very good info!
     
  9. badcobra

    badcobra It's Fast Established Member

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    I think I know what you mean here, but it wasn't stated correctly. Pumps flow more fuel volume at lower pressure than they do at higher pressure. If you are tight on fuel pump capacity, starting with a lower base pressure will give you more headroom on volume. If you are tight on fuel injector capacity, a higher base will deliver more fuel through the injector. So depending on your situation, it changes how you approach this. If you need more base pressure to accommodate smaller injectors you should plan to run the Walbro 274 high pressure pumps.

    This link is a pretty good test and explanation on pumps.
    Blog Post Radium's Ultimate Fuel Pump Test
     
    Last edited: May 17, 2021
    DSG2003Mach1, carguy96 and 03cobra#2 like this.
  10. GNBRETT

    GNBRETT Premium Member Premium Member Established Member Beer Money Bros.

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    850 whp E85 / 700 93 octane.
     
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  11. carguy96

    carguy96 Active Member Established Member

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    Those seem like very solid numbers for a standard inlet 2.8H!
     
    Last edited: May 18, 2021
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  12. carguy96

    carguy96 Active Member Established Member

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    Guess we will have to wait and see. If I could break 700 on 93, that would be something.
     
  13. carguy96

    carguy96 Active Member Established Member

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    How much boost did you run to get those numbers? I am not 100% sure what boost I will make, yet. Trying to be safe for 93.
     
  14. cj428mach

    cj428mach Well-Known Member Established Member

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    Plenty of us have maxed out ID1000's/1050's in the 700's on e85. I'd recommend something bigger.
     
  15. carguy96

    carguy96 Active Member Established Member

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    Really? I thought I’ve seen people do over 800 on ID1000s?
     
  16. cj428mach

    cj428mach Well-Known Member Established Member

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    Maybe but I ran out of injector on my stock long block 2.3 tvs, e85 car, at 22 psi. My buddy did the same with the exact same combo. Malcolmv8 ran them out before 800rwhp, Soap went to ID1300's on his 2.3 tvs e85 car.

    People kind of laughed at me and called me crazy when I said they are iffy at 700+ but it seems now over time more people have experienced it, and accepted it. ID's calculator use to show that they were getting close to maxed out around 700rwhp unless the base pressure was turned up.
     
  17. carguy96

    carguy96 Active Member Established Member

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    Who tuned your car?
     
  18. IllCobra

    IllCobra Active Member Established Member

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    Are you at high(er) elevation? Couldn't that do it? Would turning up your base pressure have solved it? I just bought a set of 1050X's so I am hoping that I don't need to sell them already for a bigger set lol
     
  19. cj428mach

    cj428mach Well-Known Member Established Member

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    I did. Tuning has nothing to do with it. When the injector hits max duty cycle and base pressure is holding you're out of injector.
     
  20. cj428mach

    cj428mach Well-Known Member Established Member

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    Depends on how far you're going to go and how much safety factor you want in there.
     

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