How did you come to a value on the coil charge time? You might need to increase the coil charge a little or even a lot.
Also running on fouled plugs can cause all manner of problems, we were doing a track car and couldn't get the CO right at all, put in new plugs, got the tuning spot-on...
After a quick grit blast the old plugs went back in and ran faultlessly again.
For now, configuration is not completely done - it is still very "raw", but at least engine starts right now each time, every time without problems - and that was impossible with Denso plugs...
We are unfortunately many months behind schedule, and right now our car needs lot of testing in extremely short time - next FS 2010 event is starting in July 15th @ Silverstone, and that's only one month away
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Our complete ignition system is right now really, how should I say, exotic, but at least it works flawlessly to 16 krpm
- 24-1 toothed wheel (laser cut from 3mmm steel plate, tooth shape & depth exactly as std 4-tooth R6 wheel, missing tooth part was made slightly shallower and with smooth edges , hopefuly to lessen effect of large missing tooth amplitude with VR conditioning circuit ),
- Yamaha R6 VR sensor,
- Ford Zetec ignition coil (this is strange choice, but as I didn't had suitable inductive COP's, this was only wasted spark coil that I had in the moment).
As ignition dwell - it's not adjusted yet - it's around 3ms, but I think we could get with 2.5ms, we should see how it will perform on testing track next week.
Before, we also thought that problems could be also caused by too short dwell - and with Denso plugs we tried up to the 4.5ms dwell but with no effect.