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Thread: Tuning with N2O (N/A V6)

  1. #1
    turbo addict Murphy's Avatar
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    Tuning with N2O (N/A V6)

    95 dodge spirit 3.0 v6 5 speed w/ NOS Sniper kit

    I have a dawes device hooked up and whenever I'm WOT it shows full rich(.99V+), even when I'm not spraying. I was looking at the jetting chart, and it looks like my fuel jets are rather large for the amount of nitrous I'm running. I was thinking I would scale back my fuel jetting until my dawes device reads green(.94-.98V). Does this sound good?

    Just FYI my current jetting is:
    size-N2O/fuel
    35-26/18
    50-30/22
    75-36/24

    according to everything I've seen aside form the manual, these sound way too rich! The nitrous nozzles sound a bit small for the shot sizes they claim too.
    95 spirit 3.0/543 15.0@91 N/A, 14.5@96 on a 50 shot RIP 87 shelby Z - project car, maybe I can drive it this year 91 spirit - roll it, chop the top, do some burnouts! RIP

  2. #2
    See me ride out of the sunset... Turbo Mopar Staff BadAssPerformance's Avatar
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    Re: Tuning with N2O (N/A V6)

    You can a little, but gotta be careful. Need to read the plugs too. Safer to be a little richer on the gun!

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  3. #3
    turbo addict Murphy's Avatar
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    Re: Tuning with N2O (N/A V6)

    basically my plan is to go down one at a time, check the A/F, read the plugs, until my a/f gauge shows less than .99V. I'm gonna try to see if a local shop will let me borrow/rent a couple jets to tune with.
    95 spirit 3.0/543 15.0@91 N/A, 14.5@96 on a 50 shot RIP 87 shelby Z - project car, maybe I can drive it this year 91 spirit - roll it, chop the top, do some burnouts! RIP

  4. #4
    Super Moderator Turbo Mopar Staff contraption22's Avatar
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    Re: Tuning with N2O (N/A V6)

    How much fuel pressure are you running? Thats critical info for nitrous jetting.
    Mike Marra
    1986 Plymouth Horizon GLMF "The Contraption" < entertaining sponsorship offers
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    http://www.turbo-mopar.com/forums/showthread.php?69708-The-Contraption-2013-14&highlight=

  5. #5
    turbo addict Murphy's Avatar
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    Re: Tuning with N2O (N/A V6)

    48 is stock, and I havent touched it. I'm gonna put a gauge on it before I start changing stuff
    95 spirit 3.0/543 15.0@91 N/A, 14.5@96 on a 50 shot RIP 87 shelby Z - project car, maybe I can drive it this year 91 spirit - roll it, chop the top, do some burnouts! RIP

  6. #6
    Super Moderator Turbo Mopar Staff contraption22's Avatar
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    Re: Tuning with N2O (N/A V6)

    That does seem a bit rich then by the calculator I use.

    You should be able to go down to a .014 fuel jet for a 35 shot and still be safely rich.

    http://www.robietherobot.com/NitrousJetCalculator.htm
    Mike Marra
    1986 Plymouth Horizon GLMF "The Contraption" < entertaining sponsorship offers
    Project Log:
    http://www.turbo-mopar.com/forums/showthread.php?69708-The-Contraption-2013-14&highlight=

  7. #7
    turbo addict Pat's Avatar
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    Re: Tuning with N2O (N/A V6)

    Don't forget, if you tune your fuel jetting to be close, you have to maintain consistent bottle pressure to keep the same amount of nitrous flowing.

    Also, if you're rich now, you're bottle pressure may be a bit low.

  8. #8
    Super Moderator Turbo Mopar Staff contraption22's Avatar
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    Re: Tuning with N2O (N/A V6)

    Quote Originally Posted by Pat View Post
    Don't forget, if you tune your fuel jetting to be close, you have to maintain consistent bottle pressure to keep the same amount of nitrous flowing.

    Also, if you're rich now, you're bottle pressure may be a bit low.
    True! The calculator I use assumes 950psi bottle pressure. Anything lower than that and it will be rich.
    Mike Marra
    1986 Plymouth Horizon GLMF "The Contraption" < entertaining sponsorship offers
    Project Log:
    http://www.turbo-mopar.com/forums/showthread.php?69708-The-Contraption-2013-14&highlight=

  9. #9
    turbo addict Murphy's Avatar
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    Re: Tuning with N2O (N/A V6)

    ya i just ordered a bottle gauge, and i'm gonna get a bottle heater.
    95 spirit 3.0/543 15.0@91 N/A, 14.5@96 on a 50 shot RIP 87 shelby Z - project car, maybe I can drive it this year 91 spirit - roll it, chop the top, do some burnouts! RIP

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