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Spark per revolution question, should be easy

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Old 05-04-03, 01:52 PM
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Spark per revolution question, should be easy

I sort of feel like experementing and want to make a sequential shift light and got confused

For an rpm signal, could i use the trailing coil, and if so would that give me 2 spark signals per rpm?
Old 05-04-03, 02:05 PM
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trailing 2 sparks, leading 4 sparks.....a timing light is a very useful tool
Old 05-04-03, 04:01 PM
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cool, so i can use a timing light to determin it on other cars

i couldnt of done iton my car nwo anyways, i have no engine
Old 05-05-03, 04:08 AM
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Both of the coils have a short lead with a feamale bullet plug that can be used for connect a tach or shift light. Both coils will give you two pulses per revolution (each rotor is fired once per rev).

Don't let the waste spark set-up fool you. The trailing coil wire gives a summed signal (one coil then the other), so both coils will give you the same reading.
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