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Thread: turning the fuel screw

  1. #1
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    turning the fuel screw

    well it has come time to play with the fuel screw some more, I have just fitted a water to air intercooler and lost some boost pressure. I have turn the fuel screw in the past and I just went some more I think I am out to 4 or 4.5 turns now and pulling 15 psi boost. NOT HAPPY NEED MORE BOOOOST. I am trying for 20 psi but am feeling a bit lost as to how many turns on the fuel screw it should take.

  2. #2
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    Quote Originally Posted by lambrover View Post
    well it has come time to play with the fuel screw some more, I have just fitted a water to air intercooler and lost some boost pressure. I have turn the fuel screw in the past and I just went some more I think I am out to 4 or 4.5 turns now and pulling 15 psi boost. NOT HAPPY NEED MORE BOOOOST. I am trying for 20 psi but am feeling a bit lost as to how many turns on the fuel screw it should take.
    What turbo? is it wastegated?

  3. #3
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    Its a garret T25, yes it is waste gated and I have a adjustable boost valve in the sense line

  4. #4
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    Lamb,

    Just disconnect the wastegate and adjust boost levels/EGT with the fuel screw...


    JC
    The Isuzu 110. Solid and as dependable as a rock, coming soon with auto box😊
    The Range Rover L322 4.4.TTDV8 ....probably won't bother with the remap..😈

  5. #5
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    Quote Originally Posted by justinc View Post
    Lamb,

    Just disconnect the wastegate and adjust boost levels/EGT with the fuel screw...


    JC
    ok.

    before intercooler I was getting 15psi and hitting 17psi on a cool morning.

    intercooler fitted boost dropped to 13psi, so I wound the screw but it has taken 2.5 turns to get back to where I was, now running 15 to 16psi.

    it just seems like it has taken alot of turns to bring me back up. I am happy with how it goes but can't help myself

  6. #6
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    Is it a noticable improvement, what's the impact on egts.
    L322 tdv8 poverty pack - wow
    Perentie 110 wagon ARN 49-107 (probably selling) turbo, p/steer, RFSV front axle/trutrack, HF, gullwing windows, double jerrys etc.
    Perentie 110 wagon ARN 48-699 another project
    Track Trailer ARN 200-117
    REMLR # 137

  7. #7
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    yes there is a bit of difference, but I am not finished playing with it yet, it has dropped the egt's a little as well, but I need to get more air flow over the water to air's radiator.

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