Engine Spark Plugs

Discussion in 'SN95 4.6L Mustang Tech' started by Navyellis, Aug 20, 2013.


  1. Navyellis

    Navyellis New Member

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    Okay guys, normally I would search around and try and find the answer through the posts but I have the feeling that not too many people have taken a 98GT and put a 3.4L whipple on it...So the question I have is I've been having some hesitation issues between 1400-1600RPM and some breakdown up in the higher RPM ranges ^4000. I'm 98% sure its the plug wires (which are coming in tomorrow) but I've also noticed after installing it I have copper plugs...So should I stick with the coppers, or change up to platnium, or iridium? I'll also be honest, I don't know much about spark plugs at all. If I change up what should I gap them to?
    #1
  2. flstang65

    flstang65 Well-Known Member

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    blower car = copper maybe even get them one heat range colder
    #2
  3. madspeed

    madspeed Colonel Mustard Mod Dude Founding Member

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    yes, one heatrange cooler with up to 12 psi, 2 colder for above that
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  4. sneaky98gt

    sneaky98gt Mustang Master

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    NGK TR6 plugs. Gap to .034.

    That's all you need for about 95% of blower cars out there. And the plugs are cheap. $1.59 last time I bought any.
    #4

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