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Which Spark Plugs?

Discussion in 'The Garage' started by 78Suburban, Mar 14, 2006.

?

What AC Delco plugs should I use?

  1. AC-R44T

    3 vote(s)
    17.6%
  2. AC-R45TS

    7 vote(s)
    41.2%
  3. Other (specify)

    1 vote(s)
    5.9%
  4. test old plugs while nekkid

    6 vote(s)
    35.3%
  1. 78Suburban

    78Suburban 1/2 ton status

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    I'm not too familiar with what the difference in heat ranges does. I need to know what plugs to use (I'm buy some new ones, along with new plug wires tomorrow, to see if it cures my wicked engine grimmlins) What gap should I use (I think .045)? It is a 350 motor, I think was origionally from a 73 camaro. HEI ignition. Mild cam. Edelbrock 600 cfm carb.
    He's a wicked embarrasing noob question, how do yall gap your plugs? Perhaps I'm doing something wrong (although I've never had problems in the past, untill I met this motor). I'm really hoping a new set of plugs and plug wires will cure my horrible drivablilty, and fouling out plugs. I'm thinking my engine troubles could very well span from plug wires that make a light show at night AND shock you :eek1: . I figure I may as well pick up a new set of plug on my voyage into the big city tomorrow :haha:
    thanks,
    James
     
  2. Muddytazz

    Muddytazz 1 ton status

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    .035 gap :thumb:
     
  3. y5mgisi

    y5mgisi 1 ton status

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    I use autolite 26's theyre my fave and yeah id go with .035 too. As far as how to gap? I use one of those little 50 cent "gaping disks" that most parts houses keep close to the counter. theyre like the size of a half doller or so and you just slide the disk inbetween the electrode and the arm over the electrode and see what its set at. close it up a bit if its too big, and visa versa.
     
  4. Wishbone

    Wishbone 1/2 ton status

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    And don't forget to check the timing after changing all that!
     
  5. R72K5

    R72K5 Banned

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    .045= Hei

    except for some 1975 vehicles that ran a .060 gap
     
  6. CB77GMC

    CB77GMC 1/2 ton status GMOTM Winner

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    R45TS .045 with Hei and Accel super coil
     
  7. Cowboy_80

    Cowboy_80 1/2 ton status

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    I'd still go with .035. I ran .035 in mine for years, never had a problem. HEI, Accel super, accel wires. I did blow apart a spark plug once though. The ceramic let go of the metal. I wonder if that was a gap issue.

    Why are you guys calling for .045 with the HEI?
     
  8. k20

    k20 3/4 ton status

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    Id say r45ts with an .045.

    Course on my 496 I am runnin r45ts with a .075 gap. Course that MSD setup lights it off good & strong. Ive opened it up on up to .09 with no misfires, but it seemed to eat the plugs too quick.

    EDIT: Whoa just noticed this thread is almost 2yrs old.
     
  9. Cowboy_80

    Cowboy_80 1/2 ton status

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    I didn't even notice that. It was up on the top of the page... wierd.
     
  10. Randy92782

    Randy92782 1 ton status

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    someone voted that's why it was at the top of the page
     

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