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Reading spark plugs boost & E85

Discussion in 'FAST Support Forum' started by 9secondz28, Jul 1, 2018.

  1. 9secondz28

    9secondz28 Member

    Joined:
    Jul 4, 2012
    Location:
    psl/florida
    Ok guys can you guys look and maybe help me with my tune? These are ngk br7ef and I’m running e85 and about 12lbs of boost.
    Questions are
    Timing good?
    Heat range good? I can switch to the tr8s
    Lean?
    It’s a sbc lt1 stroker
    Afr aluminum heads
    8.8:1
    Pump e85
    Turbocharged
    Thanks guys
     

    Attached Files:

  2. A A

    A A Well-Known Member

    Joined:
    Jun 22, 2014
    E85 burns clean. As long as they stay looking like this, everything appears normal. No signs of detonation or pre-ignition showing, and the heat range looks good.
     
  3. 9secondz28

    9secondz28 Member

    Joined:
    Jul 4, 2012
    Location:
    psl/florida
    What are signs of detonation? I just added a few lbs more of boost and it’s also been super hot out lately (Florida)


     
  4. Fastmanefi

    Fastmanefi Active Member

    Joined:
    Jun 4, 2011
    Location:
    Sonora, CA
    Plug looks pretty good. Ground strap shows that the timing is about correct. (I Like to see the color change at the bend). Gasoline would discolor the porcelain slightly making it turn tan, but E85 won't do that. Detonation would show as speckling on the porcelain. Good start!
     

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