Autolite 103

Discussion in 'V8 - Maintenance & Troubleshooting' started by shoftw, Jan 8, 2019.

  1. shoftw

    shoftw SHO Member

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    On a sparkplug cross reference chart it has autolite 103 as the equivalent to awsf22c (old pn). Just wanted to make sure this is correct. Im running a zex kit so that's why i want a plug thats one step colder.Thanks
     
    Last edited: Jan 8, 2019
  2. GEN 3 SHO FAN

    GEN 3 SHO FAN SHO Member

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    From what I have learned, any spark plug with iridium will be colder. This material offer less electrical resistance. NGK and other brands offer them as many today cars are running them from factory.

    But for your application, I'm not sure what will be the hottest part : spark plug or the entire heads (all around the plugs). The spark plugs will be as hot as the rest of the heads.
     
  3. luigisho

    luigisho SHO Member

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  4. GEN 3 SHO FAN

    GEN 3 SHO FAN SHO Member

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    Very interesting Luigisho,

    Iridium have some benefits (required coil voltage reduced by as much as 20-percent !) but there are others facts to check.

    Thanks Luigi to keep us in the right way (remembering an old spark plug war somewhere...).

    Seems not so easy to know which brand is where on a scale.

    " Unfortunately, heat range numbers are not universal—each brand has its own method for assigning heat ranges. You’ll need to talk with your sales rep or consult with the manufacturer to find the best heat range for your application and spark plug brand. Be prepared to supply some basic vehicle information, including any modifications you’ve made. "

    https://www.enginebuildermag.com/2011/05/understanding-spark-plug-heat-range/

    By googling some words we can find some heat range charts for some brands. (Autolite isn't there sadly.)
    Sparkplugchart.jpg

    Mines are NGK TR5IX (iridium), they are at 5 on the NGK scale from 2 to 12 which is considered a hot one. Confirmed after a visual check up on a old one. They have a short heat dissipation zone. (Almost perfect for my need : sporty daily driver.)

    Autolite #103 isn't on SHO page on rockauto site (even if they are many). I wasn't able to find the autolite chart at this moment, did you already found it ? (shoftw)
     
    Last edited: Jan 10, 2019
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  5. GEN 3 SHO FAN

    GEN 3 SHO FAN SHO Member

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    The cross reference list I presume...

    https://www.sparkplug-crossreference.com/convert/MTRCRFT_PN/AWSF22C

    According to Rockauto Autolite 103 fit on many ford models but not on V8 SHO. They have them for a very cheap price BTW. The rockauto isn't precise because engines aren't mentionned...

    FORD CROWN VICTORIA : 1996-2011

    FORD E-150 : 1997-2014

    FORD E-250 : 1997-2014

    FORD E-350 : 1997-2018

    FORD E-450 : 2000-2017

    FORD E-550 : 2002-2003

    FORD ECONOLINE SUPER DUTY : 1997-1999

    FORD ESCAPE : 2007-2012

    FORD EXCURSION : 2000-2005

    FORD EXPEDITION : 1997-2004

    FORD EXPLORER : 1997-2005

    FORD EXPLORER SPORT : 2001-2003

    FORD EXPLORER SPORT TRAC : 2001-2005

    FORD F-150 : 1997-2003

    FORD F-150 HERITAGE : 2004

    FORD F-250 : 1997-1999

    FORD F-250 SUPER DUTY : 1999-2004

    FORD F-350 SUPER DUTY : 1999-2004

    FORD F-450 SUPER DUTY : 1999-2004

    FORD F-550 SUPER DUTY : 1999-2004

    FORD FOCUS : 2003-2004

    FORD FUSION : 2010-2012

    FORD MUSTANG : 2003-2012

    FORD RANGER : 1996-2008

    FORD TAURUS : 1999-2006

    If the photos are the good ones, we can have a comparative look.
    103_012406__ra_p.jpg #103 104_030207__ra_p.jpg #104

    Cross reference numbers for #103 refer to grade 20 on Denso scale, 9 on Champion scale and 6 to NGK scale which are all one step colder than stock recommanded ones on Rockauto. Cannot confirm at 100% because I didn't found an Autolite scale.

    See also :
    https://www.modularfords.com/threads/195756-NGK-TR6-vs-Autolite-103
    Some are compairing Autolite 103 with NGK TR6 (could be 2 steps colder rather than one).
     
    Last edited: Jan 11, 2019
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  6. shoftw

    shoftw SHO Member

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    Thanks for responding, this is the chart im using https://www.sparkplug-crossreference.com/convert/AUTOLITE/103.

    AWSF22C has been superseded but its suppose to be one step colder and copper. I've went ahead and installed the plugs and they were the same length as my motorcraft platinum. Online it says the last number on autolite plugs indicates how hot or cold it is.

    Like you im finding conflicting info on if this is one step or two steps colder. Since i have these in I'll try them out and go from there. Everybody who responded thanks!
     

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