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Spark Plugs???!?

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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Spark Plugs???!?

Unread postAuthor: akaddis » Wed Jan 24, 2007 5:07 pm

Im a Pneumatic person....and just got started on combustion. Can I use Car "Spark Plugs" for the ignition of the fuel. And if so, How?
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Unread postAuthor: A-98 » Wed Jan 24, 2007 5:26 pm

definitely!...as for the source of the spark...try hooking up a bbq ignitor to it and seeing if that works. if it doesnt....uuhhh...i dunno. im not much of a combustion person...esp after one damn near took of my eyebrows
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Unread postAuthor: Hotwired » Wed Jan 24, 2007 5:30 pm

Spark plugs need a few KV to work so look at stunguns or piezo sparkers to generate the required voltage.
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Unread postAuthor: frankrede » Wed Jan 24, 2007 6:54 pm

They work, just not that well in a reall big chamber unless you use a few.
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Unread postAuthor: Zimdale » Wed Jan 24, 2007 7:09 pm

yeah spark plugs run on some 35,000 volts. So if ya find something that could put out that kinda power then sure ya can.
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Unread postAuthor: JDSpud » Sat Feb 03, 2007 3:17 pm

I wouldn't use peizo sparkers because i had a friend who tried one and he said that it sucked. I really think the bbq igniters are what work the best (other than stun guns of course!) but they are usually way more expensive.
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Unread postAuthor: LGM » Sat Feb 03, 2007 3:39 pm

A spark plug will work fine with a BBQ igniter, I have tried it. And, JDSpud, a BBQ igniter is peizo.
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Unread postAuthor: VH_man » Sun Feb 04, 2007 3:23 pm

Yeah, I used a spark-plug in a mini once...... it worked with those little piezo sparkers. Basically, if your spark gap without the spark plug is bigger than the gap made by the spark plug, you are perfectly ok.
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Unread postAuthor: SpudBlaster15 » Sun Feb 04, 2007 3:40 pm

You will probably have to widen the spark plug's electrode gap in order to achieve ignition, as they have a very small gap. They are designed to operate in the presense of a pressurized fuel mix, in which fuel molecules are tightly packed between the electrodes.
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