Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Spark plugs for a vortec/tbi conversion?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by blazup1x, Oct 5, 2004.

  1. blazup1x

    blazup1x Registered Member

    Joined:
    Jul 26, 2003
    Posts:
    30
    Likes Received:
    0
    Location:
    Carlsbad, NM USA
    Can anyone tell me when purchasing spark plugs for my set up do I buy plugs for a 87(stock year) or a for a later truck such as a 96 or so? Thanks.
    /forums/images/graemlins/thinking.gif
    Chris
     
  2. 84_Chevy_K10

    84_Chevy_K10 Banned

    Joined:
    May 30, 2001
    Posts:
    17,669
    Likes Received:
    0
    Location:
    IL, USA
    If you have Vortec heads, buy plugs for Vortec engines.

    AC Delco platinum ONLY!!!
     
  3. blazup1x

    blazup1x Registered Member

    Joined:
    Jul 26, 2003
    Posts:
    30
    Likes Received:
    0
    Location:
    Carlsbad, NM USA
    But It's still a 87 stock ignition, would it make a difference? but if I should run platinums guessI should pick up a set. Thanks /forums/images/graemlins/waytogo.gif
     
  4. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,980
    Likes Received:
    189
    Location:
    Roy WA
    R44LTS.

    If you don't run plugs for the Vortec heads, they won't even reach into the chambers.

    I'm sure the R44LTS isn't just a Vortec plug, but that is what you need for stock plugs for a Vortec head.
     
  5. 84_Chevy_K10

    84_Chevy_K10 Banned

    Joined:
    May 30, 2001
    Posts:
    17,669
    Likes Received:
    0
    Location:
    IL, USA
    R44LTS is a standard plug.

    Vortecs call for platinum only.
     
  6. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,980
    Likes Received:
    189
    Location:
    Roy WA
    I would suspect that has something to do with warranty intervals, no?

    Not sure why you'd need a platinum plug with compression ratio available with standard plugs and using the same HEI ignition that used standard plugs forever.

    A bit of a challenge, but I'm curious as to why the platinum plugs matter.

    You are correct, both AC part numbers appear to be platinum, one for sure is, the other is a rapidfire plug, looks to have a similar or same electrode setup as the platinum.

    No problems with mine running on the R44LTS'.
     
  7. 84_Chevy_K10

    84_Chevy_K10 Banned

    Joined:
    May 30, 2001
    Posts:
    17,669
    Likes Received:
    0
    Location:
    IL, USA
    R44LTS is not a Rapidfire plug either. Rapidfire plugs generally have single digit part numbers. Platinum or Iridium plugs have numbers such as 41-xxx. I have never seen anything else listed for a newer Chevy pickup so that is what I suggest.

    Either way, definitely AC Delco. Nothing else runs right in these engines in my experience.
     
  8. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,980
    Likes Received:
    189
    Location:
    Roy WA
    Yes, both the plugs you mentioned are listed by AC delco for a 1997 C1500 5.7L. (for instance) If the poster wants the GM recommended part numbers.

    I noticed with my headers, that number 5 plug removal/install results in a a broken insulator when you attempt to use a socket on it. Have to go in at a bit of an angle, and obviously that bit of an angle is enough to crack the insulator inside the base of the plug.

    Nothing wrong with the plugs, just gotta be careful with them.
     
  9. grundy99

    grundy99 1/2 ton status

    Joined:
    Sep 13, 2004
    Posts:
    389
    Likes Received:
    0
    Location:
    Loveland, CO
    [ QUOTE ]
    R44LTS is a standard plug.

    Vortecs call for platinum only.

    [/ QUOTE ]

    I have a GM Crate motor with Vortec heads and the book that came with my motor calls for R44LTS plugs.
    That is what i run and they work great. If nothing else call the dealer and ask the parts counter what they suggest
     

Share This Page