HaveYouSeenAWizardSleep Posted February 11, 2021 Report Posted February 11, 2021 Hey, I was just wondering if it were possible in the future for the G4X firmware to support toggle style Ignition Coils, I've wired up a few RX7s, G4Xs in the past (direct fire), and have past experience working with the MegaSquirt Platform which supported Toggle Style Ignition Coils alongside with Direct Fire (w/ Wasted Spark Leading Coils). I'm not sure if this is hardware related, but is there a possibility that this can be supported in the future via a firmware update? The only way I've been able to get around this is by adding a second igniter to trailing coil. Quote
Adamw Posted February 11, 2021 Report Posted February 11, 2021 We used to support them years ago but it was removed due to the risk of using them with user configurable limiters. I dont know all of the technical detail, but I believe the reason was that under a specific set of conditions (maybe dwell extension or attrition coupled with an ignition cut limiter), there was a potential risk that the ignitor could initiate spark on the wrong rotor. Mazda got around this by always cutting fuel a few cycles prior to cutting ignition, then only adding fuel back a few cycles after spark was reintroduced. Quote
HaveYouSeenAWizardSleep Posted February 11, 2021 Author Report Posted February 11, 2021 59 minutes ago, Adamw said: We used to support them years ago but it was removed due to the risk of using them with user configurable limiters. I dont know all of the technical detail, but I believe the reason was that under a specific set of conditions (maybe dwell extension or attrition coupled with an ignition cut limiter), there was a potential risk that the ignitor could initiate spark on the wrong rotor. Mazda got around this by always cutting fuel a few cycles prior to cutting ignition, then only adding fuel back a few cycles after spark was reintroduced. Ahh interesting, the likelihood of it being added back is slim to none I assume? Quote
Adamw Posted February 11, 2021 Report Posted February 11, 2021 Yeah I dont think it would be responsible to support a system that has high potential to cause engine damage, especially when alternative coils/ignitors are relatively low cost. Quote
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