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Author
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Topic: spark plug and tuning question
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73429MACH
Journeyman Posts: 76
From: Pocahontas,IL USA
Registered: Aug 2000
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posted 04-02-2001 10:22 PM
   
What does the terms "hotter" and "cooler" plugs mean exactly? What are the advantages or disadvantages of the two? Would either of these stop the pinging in my engine when I accelerate? I have a '71 429, I'm running Autolite plugs(stock replacement) gapped at .035, Pertronix Ignitor, stock vac. advance dist. Should I increase the gap on the plugs, or does this have any effect on the pinging? I've messed with the timing but I still have the ping. I don't have a timing light. It seems when I retard the timing it doesn't ping as bad but the engine has no power. Advance it and it runs better except for the pinging. It seems like there's no in between here. Can anyone help?
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kcode
Gearhead Posts: 3296
From: alvaton,ky,usa Suburb of Bowling Green, M&M #79, MCA #29208
Registered: Jun 99
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posted 04-02-2001 11:39 PM
An interesting spark plug site and info:www.centuryperformance.com/spark.htm Mike
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Moneymaker
Administrator Posts: 27660
From: Lyons, IL, USA
Registered: May 99
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posted 04-03-2001 08:04 PM
Use a Motorcraft AF-32 gapped at .035. Set your base timing at 10 degrees and your pinging "should" stop.  ------------------
Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link
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73429MACH
Journeyman Posts: 76
From: Pocahontas,IL USA
Registered: Aug 2000
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posted 04-05-2001 04:45 PM
Moneymaker, What is the difference in the Motorcraft AF-32 from the Autolite 45 spark plugs I'm running now? The Autolites are a stock replacement. Thanks, Ryan.
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Moneymaker
Administrator Posts: 27660
From: Lyons, IL, USA
Registered: May 99
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posted 04-05-2001 08:16 PM
An Autolite #45 is an 18MM plug for starters Ryan. It is equivilant to a BSF-42 Motorcraft which is one heat range higher than a AF-32. Do you have 18MM plug heads? ------------------
Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link
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73429MACH
Journeyman Posts: 76
From: Pocahontas,IL USA
Registered: Aug 2000
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posted 04-05-2001 08:28 PM
Moneymaker, I guess I do because that's the plugs I have now (Autolite 45). I talked to a guy at the parts store and he told me the AF-32 plug is a smaller plug,(smaller threads) Does this mean I need the BSF-42 plug instead? Or which one would you recomend? Am I needing a "cooler" plug? Bear with me here, when it comes to tuning an engine, I'm not that good. I'd rather stick to the bodywork stuff. Thanks, Ryan.
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