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FJR Motorcycle Forums
Technical & Mechanical Problems
Iridium plugs on an FJR?
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<blockquote data-quote="Rolavine" data-source="post: 599240" data-attributes="member: 15639"><p>FredW is correct according to the schematic symbol as drawn for the coils. In order for current to flow in the secondary both spark gaps have to be bridged, the secondary voltage is floating until at least one gap has been bridged, and one will always have to go plus with the other going minus. I wonder if they didn't do this to try and keep the spark in the compression stroke more consistent, as I suspect that the potential required for the spark between exhaust and intake is far more consistent while requiring a higher potential to spark(compression stroke has compressed air and fuel mixture)? Of course, this could just be the way it is drawn in the schematic, and maybe these coils are more conventional in nature with the plugs in parallel? I bet that's it, just an easy premade symbol in the schematic editor! If that is the case there shold be a ground connection to the coils, or they could just use the 12 volts internally?</p></blockquote><p></p>
[QUOTE="Rolavine, post: 599240, member: 15639"] FredW is correct according to the schematic symbol as drawn for the coils. In order for current to flow in the secondary both spark gaps have to be bridged, the secondary voltage is floating until at least one gap has been bridged, and one will always have to go plus with the other going minus. I wonder if they didn't do this to try and keep the spark in the compression stroke more consistent, as I suspect that the potential required for the spark between exhaust and intake is far more consistent while requiring a higher potential to spark(compression stroke has compressed air and fuel mixture)? Of course, this could just be the way it is drawn in the schematic, and maybe these coils are more conventional in nature with the plugs in parallel? I bet that's it, just an easy premade symbol in the schematic editor! If that is the case there shold be a ground connection to the coils, or they could just use the 12 volts internally? [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Iridium plugs on an FJR?
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