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Thread: Yellow Plugs after nitrous run?

  1. #1

    Yellow Plugs after nitrous run?

    I have a delema with the nitrous system on a vehicle the setup is as follows:
    sbc 350 .030 over
    forged manley blower pistons 8:1 comp.
    race prepped rods, crank and block
    bowl blended heads
    TBI setup
    1 annular discharge nozzle
    with .065N .053F jets
    run 10lbs. fuel and 9-950lbs. nitrous psi.

    After a run the plugs have a yellowish tint to them, I don't see any other
    signs on the plugs as being to rich, or lean cond.
    the plugs do show a rich idle but thats from the cam I'm using
    the computer doesn't like it at Idle.

    Anybody ever run into this with having yellow tint on porcelain after a run?
    and it only does it on nitrous?

    Thanks,
    NorthernPeaks[/img]

  2. #2
    Just a little on the lean side, that is where I run my N/A engines

  3. #3
    Senior Member RACING JUNKIE
    Join Date
    Nov 2004
    Location
    St. Louis, Missouri
    Posts
    664
    What brand of plug you running?

  4. #4
    Senior Member DYNO OPERATOR
    Join Date
    Aug 2007
    Location
    Lost Creek, WV
    Posts
    533
    The yellow tint is from sulfur dioxide. It is a chemical put in "RACE" grade NOS. That is what seperates it from the medical grade.

    TS1955

  5. #5
    Junior Member APPRENTICE
    Join Date
    May 2006
    Posts
    14

    yellowing

    master builder is correct

  6. #6
    Senior Member DYNO OPERATOR
    Join Date
    Apr 2008
    Posts
    496
    DO YOU USE LEADED FUEL?

  7. #7
    Senior Member RACING JUNKIE
    Join Date
    May 2006
    Posts
    2,044
    Quote Originally Posted by TS1955
    The yellow tint is from sulfur dioxide. It is a chemical put in "RACE" grade NOS. That is what seperates it from the medical grade.

    TS1955
    I concur


    Yeah, that stuff is to keep idiots from huffing it.

    Didn't phase my neighbor though, came by when I was taking my bottle our for a refill, he asked is it empy? I said yeah, he grabs it takes 2 big hits and said no it's not :shock: I just shook my head.
    ***IN GOD WE TRUST***


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