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chevy 350 spark plug numbers?

Discussion in 'The Hokey Ass Message Board' started by marq, Nov 21, 2004.

  1. marq
    Joined:
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    marq Member

    Anyone have a list of spark plug numbers for chevy 350 engines and what they were put into?it's a longshot i know but worth a go.........Marq
  2. OldCarPilot
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    OldCarPilot Member

  3. titus
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    stillwater mn

    titus Member

    yeah, Huh

    you mean like an ac delco part number for a 350 chev with HEI would be an R45TS

    points i run an R43TS's
  4. Noname38
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    Fontana/Rancho ,CA

    Noname38 Member

    yup r43ts should be like a 1.20 a piece
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  5. 1oldtimer
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    1oldtimer Member

    i use R45T but the "T" is a tapered seat and some of them used R45 (flat seat).
  6. squirrel
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    squirrel Member

    yup, you need to know which heads you have, as the early ones take the washer type plugs.

    The early 350s take R44 or R43, then starting in 1971 it's R44T or R44ts or R45Ts. Usually R45TS works fine. Set the gap at .035 for regular ignition, or .045 for HEI. The T means tapered seat, the S means projected nose.

    These are AC numbers.

  7. marq
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    marq Member

    yeah i have the small tapered seat type plug but i need to go a bit hotter than i'm running at the moment....marq
  8. marq
    Joined:
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    marq Member

    i have champion rv17yc i need hotter any suggestions?..Marq
  9. squirrel
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    squirrel Member

    hmmmm...rv17yc is an r46ts, which is hot as you should ever need. Why do you think they need to be hotter?

  10. marq
    Joined:
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    marq Member

    well from cold the engine dont burn off the fuel as well as when it's hot so a hotter plug would help.Not much hotter mind just one up.......marq
  11. squirrel
    Joined:
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    squirrel Member

    You might want to play with the carb some more before trying to solve the problem with different spark plugs. The heat range should be selected based on how the engine runs under load when it's warmed up....not when it's idling or still cold.

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