Spark plug opinions

Small Block Mopar Engine

  1. Jonnylightening

    Jonnylightening Well-Known Member

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    Pulled my plugs and to me they seem good but wanted opinions. What do you guys think? Any changes I should make? 20210721_200250.jpg
     
  2. crewchief

    crewchief A & P Mechanic FABO Gold Member

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    How many miles on them? Seems to be firing well, good color on the insulator.
     
  3. Scody21

    Scody21 Just send it

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    What brand and number plugs are you running?
     
  4. Jonnylightening

    Jonnylightening Well-Known Member

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    Maybe 40 miles if that. Running good vp110 gets pricey
     
  5. Jonnylightening

    Jonnylightening Well-Known Member

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    Autolite 3924
     
  6. Scody21

    Scody21 Just send it

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    Is VP 110 leaded gas? Timing seems alright. Not seeing much heat into the threads. Maybe a touch lean..
     
  7. crewchief

    crewchief A & P Mechanic FABO Gold Member

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    Yes, but what a fuel!
     
  8. Jonnylightening

    Jonnylightening Well-Known Member

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    Yessir! Maybe a step up or 2 on the jets?
     
  9. Jonnylightening

    Jonnylightening Well-Known Member

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    It's for sure good stuff! Local to me it's $10.50/gal
     
  10. Scody21

    Scody21 Just send it

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    Last edited: Jul 21, 2021
  11. flyfish

    flyfish C8H18+N2O = :-D

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    10.50/gal....ouch....Do you have e85 near your? If so, converting to e85 would pay for itself in 1 summer of driving, no joke (a little over $2/gal).
     
  12. Jonnylightening

    Jonnylightening Well-Known Member

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    No doubt. I think over the winter I'm gonna get parts lined up
     
  13. furrystump

    furrystump Well-Known Member

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    You can get an angle grinder with cut off disc. Cut the crimp right above the hex and pull the porcelain right out. Easy to see the WOT part throttle. This is NOT an example of good plug.

    A4029776-E82B-4EDB-9531-54C801289A0A.jpeg
     
  14. furrystump

    furrystump Well-Known Member

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    VP 110 is leaded fuel.
     
  15. Jonnylightening

    Jonnylightening Well-Known Member

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    Took it to the track and it started missing pretty good so I left off of it. Pulled the plugs again when I got home. They weren't white which was a relief but they were starting to glaze. I changed the plugs and took it out on the road and flat footed it. No miss and actually pulled me into the seat harder then it did at the track. So I'm thinking the plugs fixed it. Before I was running Autolite 3923s and the plug in the pic is the ones I had laying around. They are Autolite 5224s. Still some fine tuning but well see what happens the next go round.

    20210725_125828.jpg
     
  16. furrystump

    furrystump Well-Known Member

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    I run cheap autolite 65’s. Cheap so I change them just on a whim.
     
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