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best LS1 spark plugs ?

This is a discussion on best LS1 spark plugs ? within the External Engine forums, part of the LSx Technical Help Section category; What is the best performing spark plug for the LS1? Does anyone disagree with the long service interval on the ...

  1. #1
    Gold Member - fadjur
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    2002 Trans Am Convertible

    best LS1 spark plugs ?

    What is the best performing spark plug for the LS1?

    Does anyone disagree with the long service interval on the 02 LS1 spark plug change ? Benefits of 60K change or just more risk of damaging something...

    Any advice on changing plug wires and/OR plugs? I heard that the head bolts are the same size on one of the years...

  2. #2
    Slow'er'Ass Mr. Luos's Avatar
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    NGK TR55's

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    Senior Member INMY01TA's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    NGK TR55's
    I'll second that.

  4. #4
    ls1ftw tigersport14's Avatar
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    do they add hp?

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    Slow'er'Ass Mr. Luos's Avatar
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    Only if the stockers are REALLY bad.

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    ls1ftw tigersport14's Avatar
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    so thats basically a no lol

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    Slow'er'Ass Mr. Luos's Avatar
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    Plugs shouldn't add power.
    It is a maintenance item, not a performance mod.

  8. #8
    Senior Member Redphoenix1998's Avatar
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    TR55's for sure

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    I got TR55's but the gap is not the same on all plugs. What should I gap it to for a natural aspirated mildly modded motor (for now mwahahahaha)?

  10. #10
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    another vote for TR55's

  11. #11
    Member 01blkformula's Avatar
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    TR55's fo sho

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by Kaution vBi View Post
    I got TR55's but the gap is not the same on all plugs. What should I gap it to for a natural aspirated mildly modded motor (for now mwahahahaha)?
    .055"

  13. #13
    Member shadowsnkx's Avatar
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    why the gap at .055? I thought the manual called for .044 or something.

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    2001 ws6 6-speed david_viny's Avatar
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    Stock is .060" IIRC, but I believe there was a TSB to gap them to .040" to cure erratic idle problems in some cars.

  15. #15
    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by shadowsnkx View Post
    why the gap at .055? I thought the manual called for .044 or something.
    Stock is 0.060"
    Gap for the TR55's on a stock or near stock motor should be set at .055".



    I think the iridium plugs call for lower gaps.

  16. #16
    2001 ws6 6-speed david_viny's Avatar
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    I'm actually going to replace my plugs soon also, are the NGK TR55's you guys mention the "V-power" ones or the "iridium" or ?

    Sorry, I'm an LS1 n00b, came from the world of Modular Fords

  17. #17
    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by david_viny View Post
    I'm actually going to replace my plugs soon also, are the NGK TR55's you guys mention the "V-power" ones or the "iridium" or ?

    Sorry, I'm an LS1 n00b, came from the world of Modular Fords
    I have gotten pretty quick at the change, and change my plugs yearly. I run the V-Power type. $2 each.

    The iridium ones are like $8 a pop, but will last 3-4 times as long.

  18. #18
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    Anutha vote 4 the NGK TR55's-just bought 4 today cuz they only had 4 last week & they're $2.09/ea at AutoZone (part #3951)

  19. #19
    formally 01 T/A 0verkill's Avatar
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    "Arrest Me Red"
    2001 trans am

    has any one tryed the e-fire plugs on hours power tv thay tested beter then the leading brand just wanted to know what you guys think

  20. #20
    The Bandit Wesman's Avatar
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    Quote Originally Posted by 01 T/A View Post
    has any one tryed the e-fire plugs on hours power tv thay tested beter then the leading brand just wanted to know what you guys think
    You mean the e3 plugs?? We sell them at work, I've sold a bunch for lawnmowers and small engines, but none yet for cars because we don't keep them in stock. They make all kinds of claims about better spark and increased efficiency, never seen any hard evidence though.

    I run NGK Iridiums, btw.

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