badinfluence

I am looking to see if anyone happens to know the Current Draw of the ignition coils (stock B & or Stock C) and LS2 (any) on the RX8

Lets say at 2500 RPM to 7500RPM or just 5000RPM if you have it. I am trying to map how much of the electrical power is required and see if there is a way to guarantee the coils primary have enough to ensure the secondary gets the best spark possible (obviously the big one is voltage with any transformer/Inductor/Coil/Choke/Torrid but there is a reason these coils fail and I think heat just accelerates it. The ignition system and Alternator are targeting 14+ volts for a reason, and I trust that Mazda learned that a higher voltage is better for the whole car.... so a weak battery drawing to much could tank the ignition system in my opinion....

The best answer I can find for a newbie is use an Odyssey battery with pure virgin plates and get a 3-5 year warranty, but that isn't what I am looking for in this thread. Just wanted to throw that in there if anyone looking for an answer searches in the future.

badinfluence

If anyone is wondering, I haven't been able to find the exact number, but a good guess based on information I have found is 5amps per coil. (20amps for all 4) They are current switched based on RPM or Ignition signal and Input voltage to prevent or slow down burning up the coil with to much current for the wire.

http://home.earthlink.net/~jimlux/hv/igncoil.htm
http://www.instructables.com/answers...ignition-coil/



So when trying to estimate what kind of temporary storage you need for coils, you have to do Amp Seconds without a capacitor, and maybe even with depending on the strength of the Capacitor Mazda used. Whatever source exists, it must be capable of all the systems of the car working together at the rate they will all draw minus the alternator at lets say 25-100%.


Best guess is 50amphour for the minimum you could have to run with using the electric power steering.

9krpmrx8

iTrader: (46)

the coil thread - RX7Club.com

StarSpinner

Nice query...I'd like to see the current pass on pos. or neg. side with a multi-meter on MIN/MAX....maybe this weekend.

badinfluence

Thanks guys, much appreciated.