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need help with spark plug selection 383 turbo

Discussion in 'LS1, LS2, LS6, LT1, SBC Turbo and other GM Specfic Turbo Tech' started by toylet, Dec 31, 2009.

  1. toylet

    Joined:
    Oct 18, 2008
    fully forged 383, 8.8:1 compression, blow through 650 demon, dart iron eagle 200cc heads, aim at running it normally at 10 psi. no ic, just methanol inj. and 93 pump gas.
    will be mostly street driven in a 48 chevy pickup, with the occasional trip to the track.

    any suggestions on a correct spark plug?

    thanks
     
    toylet, Dec 31, 2009
    #1

  2. 64duece

    Joined:
    May 7, 2003
    I'd look to start with r5671a-8 (NGK Stock# 4554) These should stay clean if your tune is pretty decent. You need to run them a few hits and check the ground strap for your timing and see how they color up. If you run into issues keeping them clean, go one step hotter r5671a-7 (NGK Stock # 4091). That's as hot as you should run IMO.
     
    64duece, Dec 31, 2009
    #2

  3. toylet

    Joined:
    Oct 18, 2008
    ok thanks, i'll try those
     
    toylet, Dec 31, 2009
    #3
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