Results 1 to 6 of 6

TR55-IX or TR5-IX plugs

This is a discussion on TR55-IX or TR5-IX plugs within the General Help forums, part of the LSx Technical Help Section category; just bought some new plugs, and i think i bought the wrong ones....i told the guy at advanced auto that ...

  1. #1
    Stang Killer TransAmFanatic's Avatar
    Join Date
    Feb 2008
    Location
    Harvey, La
    Age
    33
    Posts
    294

    Pewter
    1999 Trans Am

    Question TR55-IX or TR5-IX plugs

    just bought some new plugs, and i think i bought the wrong ones....i told the guy at advanced auto that i needed some tr55-IX spark plugs from ngk, he looked it up, and said that he has them in stock...so i bought them, when i got home i checked them out and the plugs he sold me are the TR5-IX plugs....is there any difference between the two? basically what im asking is are the heat ranges the same, or are they different....i looked up the spark plug applications on ngk.com and it said that the tr5-IX plugs are premium plugs for my car.....just wanted to know if there is any difference, and if the TR5-IX plugs are going to fry my engine....
    SLP LT's, ORY, Flowmaster Catback, MTI Clear Lid, TB bypass, LS6 Intake,PP TB, Ram Air Mod, Tune, 3:73's, Deleted Cats, Deleted EGR/AIR

  2. #2
    Spaz is My Mentor SMWS6TA's Avatar
    Join Date
    Feb 2009
    Location
    Ugy Lower Corner of AL
    Posts
    10,511

    Navy Blue Metallic
    98 T/A w/a little mods...

    TR-5 are their iridium plugs while the TR-55 are copper plugs


    Good article on the differences between the types of metals for plugs

    Copper Spark Plugs vs. Iridium and Platinum: Understand for Top Performance - CarsDirect.com

  3. #3
    Stang Killer TransAmFanatic's Avatar
    Join Date
    Feb 2008
    Location
    Harvey, La
    Age
    33
    Posts
    294

    Pewter
    1999 Trans Am

    Thanks, that cleared up my questions....

  4. #4
    Spaz is My Mentor SMWS6TA's Avatar
    Join Date
    Feb 2009
    Location
    Ugy Lower Corner of AL
    Posts
    10,511

    Navy Blue Metallic
    98 T/A w/a little mods...

    OP, for the record I've tried both, I currently have a set of the TR5's in now and have a set of TR55 waiting to go back in.

    I haven't seen any improvements in power or fuel economy with the TR5's so I'm going back to the TR55's.


    Only thing the TR5's gave me was a longer lasting plug.

  5. #5
    Member km346's Avatar
    Join Date
    Nov 2008
    Location
    masssaaechuuuseettes
    Posts
    241

    Silver
    1998 hardtop SS

    Quote Originally Posted by SMWS6TA View Post
    TR-5 are their iridium plugs while the TR-55 are copper plugs
    ??? Both plugs are available in copper, platinum and iridium flavors. TR5 and TR55 are both copper plugs, the difference between the two part numbers is the gap (TR5's = .040 and TR55's = .060). If you want the iriduim version of either plug just add "IX" to the part number.

  6. #6
    Stang Killer TransAmFanatic's Avatar
    Join Date
    Feb 2008
    Location
    Harvey, La
    Age
    33
    Posts
    294

    Pewter
    1999 Trans Am

    I bought the TR-5 IX(iridium) gap .40 , I called a guy who specializes in LS motors, and ge said that the TR-5 IX plugs are hotter than the TR55 plugs, and after I did some research on both plugs, I found out that they both have same heat range...kinda mad me not want to trust him anymore....

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. tr55 plugs
    By blackbird99 in forum External Engine
    Replies: 8
    Last Post: 02-26-2008, 02:08 PM
  2. TR55 or TR6
    By Mr. Luos in forum External Engine
    Replies: 4
    Last Post: 04-22-2007, 08:19 PM
  3. NGK TR55-IX Iridium Spark Plugs
    By LS198Z in forum Parts For Sale / Trade
    Replies: 0
    Last Post: 06-18-2006, 04:35 PM
  4. Are the tr55 plugs really better than stock?
    By Street Fighter in forum General Help
    Replies: 1
    Last Post: 04-20-2006, 05:03 AM
  5. spark plugs, tr55 iridium or plane tr55 plugs?
    By got-a-ls1 in forum General Help
    Replies: 8
    Last Post: 02-09-2006, 07:06 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •