Orange spark?

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Jun 9, 2006 | 06:51 PM

#31

Bear 45/70

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From: Union, Washington

Coils don't use a case ground and never have. The windings are a grounded thru the dsit.

Jun 10, 2006 | 03:41 PM

#32

Hellbore

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Hey guys, I bought a nice feeler gauge and checked the gap on my spark plugs. It was only about .032! I think the computer said .035 but it only was .032 on my guage.

So, I opened the gap up... I figure, I have a racing type of ignition, why not try a bigger gap! So I put it at .05 for now

We'll see if it makes a difference!

Jun 10, 2006 | 11:07 PM

#33

"Beemer Nut"

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From: "Islander"

If the replacement ignition unit specs a plug gap range like .035" to .040" it is better to set at the low side as the gap will wear larger than to gap at the maximum and go wider than max spec. Going to .050" will increase voltage before firing, may cause misfiring at high rpm's under load as well harder on the wires and cold weather starts.
If it were a "racing ignition" it would erode away plugs in a short time but at the track plugs are expendable under .500 plus milliamperes up to 44 amps per plug in Top Fuel.
.....=o&o>.....

Last edited by "Beemer Nut"; Jun 10, 2006 at 11:14 PM.

Jun 10, 2006 | 11:32 PM

#34

Bear 45/70

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From: Union, Washington

On the ADI (Alternator Driven Ignition, or an electronic magneto) used on outboards the manufactures widened the gap to .040 from .030 under the premise that the ignition system was hot enough to do this and there would be a hotter spark to light the mixture. Two years later they went back to .030 because plugs were wearing out in just 3 months over one summer where before the plugs were usually changed as preventive maintenance after 2 or 3 years. A big gap is not necessarily a good idea unless you are running ultra lean or very rich or exotic fuels.

Jun 11, 2006 | 12:37 AM

#35

"Beemer Nut"

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From: "Islander"

And a lot higher output ignition system, not for street use.

Magneto ignition motors in general run .025" to .028" maximum plug gap.
I have a Allison 1710 magneto that will burn thru 7mm wires when spun at 1750 rpm's, a fat purple spark that will make your arm go numb for two days after being hit. Don't ask as I had to go see a doctor, young and dumb stunt # 23,792.

.....=o&o>.....

Last edited by "Beemer Nut"; Jun 11, 2006 at 12:40 AM.

Jun 11, 2006 | 01:40 AM

#36

Bear 45/70

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From: Union, Washington

The ADI systems are basicly a stator (under the flywheel) producing about 200 volts AC sent to a "Switch Bo

es)" controlled by magnetic triggers also under the flyweel that tells the box which coil (2 to 12 depending on the engine) it is sent to, to fire that coil. As long as you can rotate the flywheel at 100 rpms (50 rpms gets you 30K volts)you have the same output as you do at 8000 (around 70k volts from the coil) and that will numb your arm so fast you will be out the rest of the day if not for several, sayeth the voice of several bad experiences (AKA a slow learner sometimes or just careless from being luck for a while).