Spark Plug Question?
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Spark Plug Question?

  1. #1
    Super Moderator HammerDown's Avatar
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    Question Spark Plug Question?

    Just asking > is there any real advantage to the fine-wire Platinum/Iridium type plugs from Autolite or NGK etc?

    Reason...I've always used copper core plugs for my Vette,Harley and Boat.
    The HD has a Crain HI4 ignition, the Vette is HEI and now the Jet Boat has the MSD-RTR dizy.

    I'm not expecting HP gains per say but maybe just a better burning plug...even if that hype is real.

    Are they worth considering, or should I just stay with my Champion Copper Core for the HD > and the regular AC Delco's for the Vette and Jet Boat?

    Can't say I've had any issues with the standard type plugs > the HD burns a little rich during our hot humid summers and it's air cooled so somewhat inconstant.
    <img src=http://www.performanceboats.com/gallery/data/500/medium/06-30-11_1234.jpg border=0 alt= />

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    gn7
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    The fine wire plugs require slightly less voltage to fire. But the spark is not as hot, and smaller. Not all fine wires are plat or iridium. the major reason for the platinum plug coming on the scene was not for power or even emission in itself. It was because of the EPA mandates for holding tune or emission requirements or an extended period. With todays OEM ignitions and the Platinum plugs, 100,000 or even now 150,000 miles between plug changes is the norm. There are claims that the Denso Iridium make big gains in boosted applications. Not buying into it. Maybe on extreme boost situations where the plug is difficult to fire. But if the energy is there to fire a standard plug, I don't see how there can be any gain. Now ask me how I feel about these

    http://www.pulstar.com/



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    Quote Originally Posted by gn7 View Post
    ... Now ask me how I feel about these

    http://www.pulstar.com/
    Ok, so lets have it.
    And thanks for your feedback > staying with the standard plugs.
    <img src=http://www.performanceboats.com/gallery/data/500/medium/06-30-11_1234.jpg border=0 alt= />

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  7. #5
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    This one has to kick ass
    <img src=http://www.performanceboats.com/gallery/data/500/medium/06-30-11_1234.jpg border=0 alt= />

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    Default spark plugs

    Quote Originally Posted by HammerDown View Post
    Just asking > is there any real advantage to the fine-wire Platinum/Iridium type plugs from Autolite or NGK etc?

    Reason...I've always used copper core plugs for my Vette,Harley and Boat.
    The HD has a Crain HI4 ignition, the Vette is HEI and now the Jet Boat has the MSD-RTR dizy.

    I'm not expecting HP gains per say but maybe just a better burning plug...even if that hype is real.

    Are they worth considering, or should I just stay with my Champion Copper Core for the HD > and the regular AC Delco's for the Vette and Jet Boat?

    Can't say I've had any issues with the standard type plugs > the HD burns a little rich during our hot humid summers and it's air cooled so somewhat inconstant.
    Hi,
    I am the technical manager at Autolite Spark plugs. The first poster who answered is well.... partially correct. Iridium fine wire plugs do take less volatge to fire than conventional plugs. The incorrect part is they do not "burn as hot" or the spark is smaller. Simply not true. Heat range is heat range and if it is matched correctly, the burn temp is the same wether using copper, platinum, DP or iridium fine wire. Secondly, we have independent research from Southwest Labs showing our XP plugs having a 20+% larger flame kernal in the combustion chamber over standard copper plugs. What you will notice in any carburated vehicle is crisper throttle response throughout the midrange and improved starting. If you want to learn more about what iridium is all about, go to www.autolitechallenge.com/pro and watch the videos there, particularly the ones on metallugy and heat range. And yes, the ugly mug in the video is me. Nice boat.

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    Quote Originally Posted by motorking View Post
    Hi,
    I am the technical manager at Autolite Spark plugs. The first poster who answered is well.... partially correct. Iridium fine wire plugs do take less volatge to fire than conventional plugs. The incorrect part is they do not "burn as hot" or the spark is smaller. Simply not true. Heat range is heat range and if it is matched correctly, the burn temp is the same wether using copper, platinum, DP or iridium fine wire. Secondly, we have independent research from Southwest Labs showing our XP plugs having a 20+% larger flame kernal in the combustion chamber over standard copper plugs. What you will notice in any carburated vehicle is crisper throttle response throughout the midrange and improved starting. If you want to learn more about what iridium is all about, go to www.autolitechallenge.com/pro and watch the videos there, particularly the ones on metallugy and heat range. And yes, the ugly mug in the video is me. Nice boat.
    I thank you for the feedback...and welcome to the Forum.
    <img src=http://www.performanceboats.com/gallery/data/500/medium/06-30-11_1234.jpg border=0 alt= />

  10. #8
    gn7
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    Quote Originally Posted by motorking View Post
    Hi,
    I am the technical manager at Autolite Spark plugs. The first poster who answered is well.... partially correct. Iridium fine wire plugs do take less volatge to fire than conventional plugs. The incorrect part is they do not "burn as hot" or the spark is smaller. Simply not true. Heat range is heat range and if it is matched correctly, the burn temp is the same wether using copper, platinum, DP or iridium fine wire. Secondly, we have independent research from Southwest Labs showing our XP plugs having a 20+% larger flame kernal in the combustion chamber over standard copper plugs. What you will notice in any carburated vehicle is crisper throttle response throughout the midrange and improved starting. If you want to learn more about what iridium is all about, go to www.autolitechallenge.com/pro and watch the videos there, particularly the ones on metallugy and heat range. And yes, the ugly mug in the video is me. Nice boat.
    Didn't mean to imply that the plug operated colder. But that the spark itself is not as hot. Due in part to the fact that it will jump the gap at a lower voltage than a conventional plug. What no comment on the Pulstar plugs?



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    Last edited by gn7; 07-28-2010 at 05:14 PM.

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