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Thread: Nitrous spark plug info

  1. #31
    Join Date
    Dec 2007
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    Quote Originally Posted by pl4yboy View Post
    I'm fairly good at reading the timing mark and rich/lean... How do you decide to go up or down a heat range?
    Looking at the outside threads and the heat mark it leaves on them... should only be on a few threads. If it goes all the way to the base, you need colder plugs. It may take a few passes/hits to show this.
    30' Ford Model A Tudor Sedan - Custom chassis - Big bore LS2 - twin B76's - Glide - 9" w/ 3.07 gears - 30" DR tire - 2k lbs cruiser

  2. #32
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    Quote Originally Posted by PurpleMinivan View Post
    Looking at the outside threads and the heat mark it leaves on them... should only be on a few threads. If it goes all the way to the base, you need colder plugs. It may take a few passes/hits to show this.

    That's what I thought. It also means 6's are the correct heat range for me. I'm showing 3 threads.

    1969 Chevy RCLB C10 350/TH400 SOLD
    2007 Chevy RCSB 4.8 4x4 LS SOLD
    2008 Chevy RCSB 5.3 4x4 LT SOLD
    2010 Chevy CCSB 6.2 4x4 LT SOLD
    2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
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  3. #33
    Join Date
    Aug 2007
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    How does it go the bigger the number the colder or opposite?

  4. #34
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    May 2008
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    Crowder, OK
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    Correct.

    1969 Chevy RCLB C10 350/TH400 SOLD
    2007 Chevy RCSB 4.8 4x4 LS SOLD
    2008 Chevy RCSB 5.3 4x4 LT SOLD
    2010 Chevy CCSB 6.2 4x4 LT SOLD
    2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
    2013 FORD CCSB F350 6.7 Powerstroke 4x4


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