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Tractor Talk Discussion Forum

Hot spark

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other Will

10-18-2004 05:15:27




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Will spark plugs with hotter range damage an engine? Books all say to use the correct heat range plugs, yet some companies say to use their coil, electronic ignition, etc for a "hotter" spark. What gives?




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Bob - MI

10-18-2004 05:34:44




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 Re: Hot spark in reply to other Will, 10-18-2004 05:15:27  
Hotter plug range is different from "hotter spark". Plug range heat is dictated by the exposed length of the ceramic insulator that surrounds the electrode. Longer length = more exposure to combustion = higher retained heat. Colder range works the other way. Only reason that I know this is due to growing up in Michigan and having two-stroke motorcycles and snowmobiles. Depending on the ambient temp. we would have to switch plug ranges and actually used to carry different ranges in the tool kits. General rule used to be that the coldest plug that won"t foul out is better. Too hot of a plug could cause pre-ignition and that"s bad.

Hotter spark is just that and it"s a momentary thing that triggers the combustion cycle. I"m sure that some of it is hype but too little spark is a bad thing so it kind of boils down to what works for your engine application. High performance engines with high compression ratios would be good candidates for "hotter spark". Those engines that use a lot of oil may also benefit but they would generally need hotter plugs too.

If your engine runs good on stock plugs use them.

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Coloken

10-18-2004 06:41:15




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 Re: Hot spark in reply to Bob - MI, 10-18-2004 05:34:44  
So very well said that I think this should be placed over some where in the reference material.



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Bob - MI

10-18-2004 12:15:36




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 Re: Hot spark in reply to Coloken, 10-18-2004 06:41:15  
Thanks.



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Allan in NE

10-18-2004 05:42:45




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 Re: Hot spark in reply to Bob - MI, 10-18-2004 05:34:44  
Mornin' Bob,

Not to stray from the thread, but as you probably know I'm working on this hydraulic project.

Would you mind if I nosed around your site? I know you had some stuff up there with valving, gearing and all. I can't remember the URL tho..... ...

Thanks,

Allan



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Bob - MI

10-18-2004 05:59:00




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 Re: Hot spark in reply to Allan in NE, 10-18-2004 05:42:45  
Alan,

Wrong Bob I think. You can nose around the site for the CNC machining company that I represent if you get bored though, www.nowakmp.com. Pretty cool stuff.



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Allan in NE

10-18-2004 05:48:45




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 Re: Hot spark in reply to Allan in NE, 10-18-2004 05:42:45  
Or,

Maybe I got the wrong Bob here? :>)

Allan



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