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  1. #1
    oikonomoupetros's Avatar
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    Question Look at these spark plugs....and some thoughts



    So here i am....thinking what to do with this situation.....
    My ski just reached 150 hours.
    All my mods are listed at my signatute. As you can see the jet is running lean...so there is an issue. At this moment i am using stage 1 Vtech flash, 8375 169 36 39 AGR.
    Vtech has sent me a new tune, 48 8375 170 35 34.
    I am waiting for the following parts to arrive:
    - datalogger
    - VT 1100 injectors
    - wideband
    - Egt meter (just arrived)
    - Boost meter
    - Riva retainers and springs (arrived)

    Until i start checking my AFR etc should i use the new tune from Vtech or flash my ecu with the oem tune?
    I tend to decide for option 2, flashing my ecu to OEM specs and once i have all parts installed then i ll choose the right tune with the help of Vtech advise.
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  2. #2
    Branden's Avatar
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    personally if those plugs have 150 hours on them, they dont look bad. the second tune will be much safer than the one you are currently running as it has way less timing in it.

  3. #3
    oikonomoupetros's Avatar
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    Plugs are new, 5-6 hours.
    My engine has 150 hours

  4. #4
    Branden's Avatar
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    the plugs dont look bad either way. i would rather pull a set out looking like that than jet black.

  5. #5
    oikonomoupetros's Avatar
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    Another friend says they seem fine!
    Damn...i am no mechanic, i just can not imagine having any kind of damage now that the season starts!

  6. #6
    Branden's Avatar
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    if you are really worried, put the tune in with less timing. 34 degrees is very safe for a stock x charger.

  7. #7
    Bob 1tommygunner1927's Avatar
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    At 8300+ rpm your stock 48# injectors are at 105+% duty cycle.....which means your engine is running even leaner than stock. Until you install the parts you listed, keep your rpm at 8100 or lower!

  8. #8
    oikonomoupetros's Avatar
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    During The last 2 hours of use i have not revved above 7000rpms


  9. #9
    Bob 1tommygunner1927's Avatar
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    Go ahead and install the new 48 8375 170 35 34 tune now but still limit rpm to 8100/8160. Install new plugs, run it, post pics of plugs!

  10. #10
    oikonomoupetros's Avatar
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    How can i limit the rpm?

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