dual plug heads
Re: dual plug heads
It's actually a graduated firing order. At low RPMs, both plugs fire at the same time and above a certain RPM, they fire plug A and then 10* later, it fires plug B and the next ignition event would be the opposite and it alternates like that until it gets below that RPM threshold where it goes back to firing them at the same time.
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srt6Master (04-28-2023)
Re: dual plug heads
Are these cars SMART or what? Not only do they know how to adjust the firing sequence of the twin plugs, but they reverse the order. I miss the simplicity of my 48 Chevy that started even with the distribution 180* out of phase, but it was no where as much fun as the XFs. How did you find out this fascinating tidbit?
Re: dual plug heads
Originally Posted by Buggin
Cool, I learned something new today!
This is my 2nd. car with twin spark plugs. The other one was a 1983, Nissan 200SX. I bet it's spark plugs didn't fire sequentially.
Bmorgan, was that a Rotary reference?
Re: dual plug heads
Originally Posted by Infinite
Theres no real way for the stock ecu to split it like that.
Each coil is actually 2 seperate coils, with common wiring.
3 wires, positive, ground, and the signal wire. If it fires one, both fire.
Each coil is actually 2 seperate coils, with common wiring.
3 wires, positive, ground, and the signal wire. If it fires one, both fire.
Re: dual plug heads
Originally Posted by Infinite
If theres 2 signal wires, then each coil has its own driver. The thing you need to find out is can 1 driver handle the load for 2 coils
Re: dual plug heads
Originally Posted by Infinite
it sounds like a recipe for a disaster.
The aem fic is the way to go for me, at least with this car. My 240, full standalone. But as much wiring and integrated features this car has, best leave the stock ecu in place
The aem fic is the way to go for me, at least with this car. My 240, full standalone. But as much wiring and integrated features this car has, best leave the stock ecu in place
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