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Re: [Fot] Spark Plugs

To: fot@autox.team.net
Subject: Re: [Fot] Spark Plugs
From: Glenn Franco via Fot <fot@autox.team.net>
Date: Fri, 24 Apr 2015 09:21:18 -0400
Delivered-to: mharc@autox.team.net
Delivered-to: fot@autox.team.net
References: <Pine.LNX.4.62L.1504231426360.453@isis.mit.edu> <8D2C23C2-22EE-473C-A048-1C7CE5A4E4B3@ponostyle.com> <84F56CFCC31FAC48AE160008ADDECFA50BA0C71C@SVR-EXCH02.mccarty-law.com>
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It is the distance the heat has to travel up the center electrode to the 
metal shell so the plug can transfer heat to the water jackets in the head.
The greater distance the hotter the plug and shorter the cooler the heat 
range of a plug.
Champion makes is easy since the higher the number the hotter the plug.
A Champion RN9YC is a cooler plug than a RN12YC.
Look in any automotive text book or the Champion manuals for the 
explanation.
Glenn

On 4/24/2015 9:11 AM, Barr, Scott via Fot wrote:
>
> OK, so here?s the stupid question of the day ? what is it that makes a 
> hot plug ?hotter? or a cold plug ?colder?.  Is a ?colder? plug more 
> resistant to absorbing heat?  And if so, why?
>
> Scott (B.)
>
> *From:*Fot [mailto:fot-bounces@autox.team.net] *On Behalf Of *Bill 
> Babcock via Fot
> *Sent:* Thursday, April 23, 2015 7:11 PM
> *To:* Robert M. Lang
> *Cc:* fot@autox.team.net
> *Subject:* Re: [Fot] Spark Plugs
>
> Why would you want to play with heat range on a dyno? There?s no 
> horsepower difference. The only function of heat range is to have the 
> porcelain at the right temperature to burn off deposits and not 
> overheat to the point that the plug electrode melts or the porcelain 
> blisters. Or at an extreme that the spark plug starts acting like a 
> glow plug. Some tracks that are very tight or that have elevation 
> changes might dictate a change to a hotter plug, or one with long open 
> straights might warrant a colder one, but once you?re in the ballpark 
> you shouldn?t have to do much.
>
>     On Apr 23, 2015, at 8:51 AM, Robert M. Lang via Fot
>
>     Hi,
>
>     I've been using Accel 114's for the last ten or 15 years, they
>     seem to work fine. I have a collection of different temp range
>     plugs from Accel all the way from 113 through 117. I've never
>     taken the time to play on the dyno to see if there's any
>     difference changing heat range. I know = "my bad". I've never had
>     a plug fail despite the amount of internet detritus regarding the
>     quality of this brand.
>
>     In any case I was thinking about switching to NGK. My TR6 motor is
>     12:1, Webers, cam (street duration Isky Z19), header, etc.
>     Ignition is Mallory / Pertronix.
>
>     Would the NGK BP6ES or BP7ES be a better choice?
>
>     Regards,
>     rml
>     
> ---------------------------------------------------------------------------
>     Bob Lang              Triumph TR6!!            |  This space for rent
>     Former NER Solo Chair                          |
>     Voice:617-253-7438                             |  Cell: 339-927-4489
>     
> ---------------------------------------------------------------------------
>     _______________________________________________
>
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>
> Bill Babcock
>
>
> Editor: Ponostyle
>
> /Celebrating Water/
>
> Editor: Xtreme Geezer
>
> /Fitness and Fun After Forty/
>
> 503.936.7660
>
> http://www.PonoStyle.com
>
> http://www.Xgeez.com
>
>
>
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    <div class="moz-cite-prefix">It is the distance the heat has to
      travel up the center electrode to the metal shell so the plug can
      transfer heat to the water jackets in the head. <br>
      The greater distance the hotter the plug and shorter the cooler
      the heat range of a plug.<br>
      Champion makes is easy since the higher the number the hotter the
      plug. <br>
      A Champion RN9YC is a cooler plug than a RN12YC.<br>
      Look in any automotive text book or the Champion manuals for the
      explanation.<br>
      Glenn<br>
      <br>
      On 4/24/2015 9:11 AM, Barr, Scott via Fot wrote:<br>
    </div>
    <blockquote
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        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">OK,
            so here?s the stupid question of the day ? what is it that
            makes a hot plug ?hotter? or a cold plug ?colder?.  Is a
            ?colder? plug more resistant to absorbing heat?  And if so,
            why?<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D">Scott
            (B.)<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1F497D"><o:p> </o:p></span></p>
        <div>
          <div style="border:none;border-top:solid #E1E1E1
            1.0pt;padding:3.0pt 0in 0in 0in">
            <p class="MsoNormal"><b><span
                  
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> Fot
                [<a class="moz-txt-link-freetext" 
href="mailto:fot-bounces@autox.team.net";>mailto:fot-bounces@autox.team.net</a>]
                <b>On Behalf Of </b>Bill Babcock via Fot<br>
                <b>Sent:</b> Thursday, April 23, 2015 7:11 PM<br>
                <b>To:</b> Robert M. Lang<br>
                <b>Cc:</b> <a class="moz-txt-link-abbreviated" 
href="mailto:fot@autox.team.net";>fot@autox.team.net</a><br>
                <b>Subject:</b> Re: [Fot] Spark Plugs<o:p></o:p></span></p>
          </div>
        </div>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">Why would you want to play with heat range
          on a dyno? There?s no horsepower difference. The only function
          of heat range is to have the porcelain at the right
          temperature to burn off deposits and not overheat to the point
          that the plug electrode melts or the porcelain blisters. Or at
          an extreme that the spark plug starts acting like a glow plug.
          Some tracks that are very tight or that have elevation changes
          might dictate a change to a hotter plug, or one with long open
          straights might warrant a colder one, but once you?re in the
          ballpark you shouldn?t have to do much. <o:p></o:p></p>
        <div>
          <p class="MsoNormal"><o:p> </o:p></p>
          <div>
            <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
              <div>
                <p class="MsoNormal">On Apr 23, 2015, at 8:51 AM, Robert
                  M. Lang via Fot &lt;<a moz-do-not-send="true"
                    href="mailto:fot@autox.team.net";>fot@autox.team.net</a>&gt;
                  wrote:<o:p></o:p></p>
              </div>
              <p class="MsoNormal"><o:p> </o:p></p>
              <div>
                <p class="MsoNormal" style="margin-bottom:12.0pt">Hi,<br>
                  <br>
                  I've been using Accel 114's for the last ten or 15
                  years, they seem to work fine. I have a collection of
                  different temp range plugs from Accel all the way from
                  113 through 117. I've never taken the time to play on
                  the dyno to see if there's any difference changing
                  heat range. I know = "my bad". I've never had a plug
                  fail despite the amount of internet detritus regarding
                  the quality of this brand.<br>
                  <br>
                  In any case I was thinking about switching to NGK. My
                  TR6 motor is 12:1, Webers, cam (street duration Isky
                  Z19), header, etc. Ignition is Mallory / Pertronix.<br>
                  <br>
                  Would the NGK BP6ES or BP7ES be a better choice?<br>
                  <br>
                  Regards,<br>
                  rml<br>
---------------------------------------------------------------------------<br>
                  Bob Lang              Triumph TR6!!            |  This
                  space for rent<br>
                  Former NER Solo Chair                          |<br>
                  Voice:617-253-7438                             |
                   Cell: 339-927-4489<br>
---------------------------------------------------------------------------<br>
                  _______________________________________________<br>
                  <a moz-do-not-send="true"
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                      <p class="MsoNormal"><span
                          style="font-size:10.5pt;font-family:&quot;Comic
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style="font-family:&quot;Helvetica&quot;,sans-serif;color:black"><o:p></o:p></span></p>
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style="font-size:10.5pt;font-family:&quot;Georgia&quot;,serif;color:black">Editor:
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style="font-family:&quot;Helvetica&quot;,sans-serif;color:black"><o:p></o:p></span></p>
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