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Spark plugs (gap size)

This is a discussion on Spark plugs (gap size) within the External Engine forums, part of the LSx Technical Help Section category; If I dont have the peice to check the gap size, what could I just to check it, I just ...

  1. #1
    Senior Member Justin23454's Avatar
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    SOM
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    Spark plugs (gap size)

    If I dont have the peice to check the gap size, what could I just to check it, I just bought the AC Delco Iridium yesterday and wanna put them in SAt. when I do my headers, anyone know what else I can use to make sure they have the right gap?

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    Member 346ci's Avatar
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    NBM
    1998 Z-28

    You can go to NAPA or somewhere and pick up spark plug gap measuring tool for around $5, they're usually inexpensive.

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    Senior Member Justin23454's Avatar
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    alright, what size gap should I have in it?

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    Army Dude robcas47's Avatar
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    Arctic White
    01 TA / 06 Duc 749D

    just go to the nearest auto parts store and right next to the cash register they sell the half dollar size gap mesuring/adjusting tool. then just ask them to look it up in thier computer system and you should be good as far as proper mesurements. that lil tool only cost like $2 at the most.

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    Senior Member 35thAnniZ28's Avatar
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    eating bulldog
    son of biscuit

    oh ask in autozone or advance i think..theyll tell you at the counter...they should have it stored in the computer

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    Member hoss 2000 z-28's Avatar
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    Monterey Maroon Metalic
    2000 Z28

    I used NGK TR55's and gapped them at .45 I was told by a very reputable LS1 guy around here that these plugs and this particular gap was good for N/A applications. I think the iridium plugs are best for FI? Not sure what gap for your application though.

  7. #7
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    i got ngk tr55s and left them at the gap they came with. i think .50

  8. #8
    Member hoss 2000 z-28's Avatar
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    Monterey Maroon Metalic
    2000 Z28

    That's right

  9. #9
    Senior Member splitfinger09's Avatar
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    Bright Rally Red
    2000 Camaro SS #5075 M6

    stock gap on my 2000 was .060

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