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Spark Duration vs Mj of Energy

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Old Jan 1, 2022 | 03:59 PM
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Default Spark Duration vs Mj of Energy

How do those here control Arc Duration ?
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Old Jan 1, 2022 | 04:42 PM
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Originally Posted by IGN-1A
How do those here control Arc Duration?
The real question here would be- How WOULD those here control Arc Duration?
Can it be done via HPtuners, or any other tuning platform?
Or is any other method commonly available?
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Old Jan 1, 2022 | 05:09 PM
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Default Spark Plug Gap

The most simple method is to change the SPG
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Old Jan 1, 2022 | 05:50 PM
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I always thought the gap influenced the intensity, not the duration.
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Old Jan 1, 2022 | 07:26 PM
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Default Spark related to piston position

I have read here, most will reduce SPG on a high compression/boosted engine.
The small gap .020" will increase the Arc Duration and with a powerful coil like the IGN-1A, the Arc can exceed 30* of crankshaft rotation.
A waste of energy.
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Old Jan 1, 2022 | 08:24 PM
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The reduction in gap is because weaker coils simply can't jump the gap under very high cylinder pressures. Possibly your coil can surmount that obstacle?
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Old Jan 12, 2022 | 11:08 AM
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Default Ign-1a spg

Yes, the IGN-1A coil can fire a cylinder @ 35 .lbs of boost with E-85 fuel when the Spark Plug Gap is .045".
This will allow the "arc" to take place at the best piston position.
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Old Jan 12, 2022 | 12:59 PM
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I've read of others here who are quite knowledgeable, who have bought and used your coils with great results.
If you would excuse any ignorance on my part, would your coil show any performance improvement on a "bread and butter" situation such as the stock LM7 in my Tahoe? About 9.6:1 compression, 290HP.
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Old Jan 12, 2022 | 01:23 PM
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Default IGN-1A Coils reduce fuel consumption

True, users report a wheel HP increase of 18 with a 500 HP engine.
I should add, they report better throttle response and a increase in MPG
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Old Feb 4, 2022 | 08:49 PM
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Default IGN-1A Ignition Advance Reduction

Hi All, I sold another set of IGN-1A Coils to a LS-1 Tech user today.
My advice was to use three degrees LESS ignition advance !
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Old Jul 7, 2022 | 09:02 AM
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so the question was how do spark duration and spark energy controll arc duration? whats the answer?
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Old Jul 7, 2022 | 03:02 PM
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Default Spark Duration = Arc Duration

Arc Duration is controlled by SPW resistance, Coil Energy, and Spark Plug Gap.
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Old Jul 7, 2022 | 10:40 PM
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so whats the relationship and how much does arc duration matter (in our engines)? no idea why wire resistance would contoll it, as the plug resistance is is an order of magnitude higher. please explain.
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Old Jul 8, 2022 | 05:16 PM
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Default A short spark is a bad way to start combustion

The MSD CDI 6-AL produces a SHORT spark.
This will cause miss-fire at low RPM.
The answer was to spark many times at low RPM.

The normally LS engine uses a short spark plug wire.
When a SPW of 250 Ohms or higher is fitted, the spark will last longer.
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