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TR5 or TR55

This is a discussion on TR5 or TR55 within the External Engine forums, part of the LSx Technical Help Section category; Hi guys I am currently running TR55s gapped at .060, and looking at alldata they have a tsb specifying 41-985s ...

  1. #1
    Member 99yellowz28's Avatar
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    TR5 or TR55

    Hi guys I am currently running TR55s gapped at .060, and looking at alldata they have a tsb specifying 41-985s and gap of .040.

    I did some more research and on sparkplugs.com they plugs shown for my 99 Z28 are NGK TR5s with a gap of .040. My question is what spark plugs are you guys using?


    TIA

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    Am got ngk tr55 gaped at .50 and i also heard about 40-45???????

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    Slow'er'Ass Mr. Luos's Avatar
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    TR55 at .052

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    Senior Member bluehawk2000's Avatar
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    pulstar, is this a good spark plug I have seen them in magazines, and they are 24 bucks a pop, which is rediculous imo for one spark plug. Has anybody seen any reviews on them or used them theirselves.

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by bluehawk2000 View Post
    pulstar, is this a good spark plug I have seen them in magazines, and they are 24 bucks a pop, which is rediculous imo for one spark plug. Has anybody seen any reviews on them or used them theirselves.
    Don't even think about it.

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    I don't sell out! blackSS01's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    Don't even think about it.
    +1000 Waste of money.
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    Veteran Hi-Po's Avatar
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    Quote Originally Posted by bluehawk2000 View Post
    pulstar, is this a good spark plug I have seen them in magazines, and they are 24 bucks a pop, which is rediculous imo for one spark plug. Has anybody seen any reviews on them or used them theirselves.
    WHAT???? Do not, do not buy those.

  8. #8
    Senior Member bluehawk2000's Avatar
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    lol was not ever planning on paying 20 bucks for one spark plug thats insanity, but whats wrong with those plugs, whats the deal with them?

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    King 0f n00bz shady milkman's Avatar
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    Quote Originally Posted by 99z-28 View Post
    Hi guys I am currently running TR55s gapped at .060, and looking at alldata they have a tsb specifying 41-985s and gap of .040.

    I did some more research and on sparkplugs.com they plugs shown for my 99 Z28 are NGK TR5s with a gap of .040. My question is what spark plugs are you guys using?


    TIA
    why such a high gap ?

  10. #10
    Turgid Member Goat-E's Avatar
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    Tr55 .040

  11. #11
    Junior Member Bama99z's Avatar
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    Just got through with a LT & ORY project. Car had 116500 miles on the AC Delco iridium. Granted they were worn slap ass out but for the the hassel to get them removed I decided to re-install them for another 90,000. Only problem is the cost roughly 6~7.00 dollars each.But i think that they are worth the extra money. Go ahead and get the MSD 8.5 wires as well!!!

  12. #12
    Turgid Member Goat-E's Avatar
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    +1 on the MSD 8.5 wires. Best for the money IMO. I can take mine on and off by hand but I do recommend putting dielectric grease on the plug shafts. NOT ON THE TIP!!!

  13. #13
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    tr-55 .050

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    Member 6.0LiterImportEater's Avatar
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    TR5 0.40 cuz they are cheap and im still basically stock

  15. #15
    Member 99yellowz28's Avatar
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    Quote Originally Posted by shady milkman View Post
    why such a high gap ?
    pretty sure thats what the owners manuel said

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