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My current setup uses 'single pulse' trigger from an electronic dizzy. So the ecu knows when a spark event is happening, it just doesn't know on what cylinder. Hence why I still need to use the top half of the dizzy to distribute spark. Additionally the injectors need to be fired in a bank. With the custom cas I built, it has a 'dual pulse' on cylinder 1 and singles on the other 3 so the ecu will now know which cylinder is actually firing. Doing this you can run quad coils like this as well as sequential injection.... firing the injectors individually as the fuel is required essentially.

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Have done a little more research & have come up with the Toyota CoP P/N 90919-02240, which was fitted to the Toyota 1NZFE & 2NZFE engines on the Echo & Yaris cars. I chose these CoPs, as they have built in ignitors, which are both dumb & smart at the same time. The dwell will continue, just as long as the trigger signal is present from the ECU, but will also produce a minimum dwell, irrespective of how short the trigger signal is. These CoPs have a single bolt hole which normally bolts up flush with the Echo / Yaris camshaft cover. My daughter has an 2004 Echo with a 1NZFE engine, so I "borrowed" a CoP from her car this morning, and set it up on a 4K head on the bench. There are several spare 10mm threaded bolt holes on the rocker cover, on the spark plug side, which could anchor a simple, solid, single, mounting plate, to hold all four CoPs. It would require just one bend in the mounting plate. I'll fashion a mounting plate from a piece of then thinner aluminium, & dummy it all up on the bench, to make sure it all works & fits fine. One of the advantages of this arrangement, besides doing away with spark plug leads, distributor cap, and existing coil, is that propped up in the air like that, they will not overheat, as there will plenty of air flow over them. Apparently, from my reading on the net, overheating CoPs, tucked under plastic covers, (which often restricts air flow), can result in damaged or failed CoP coils & ignitors. Although CoPs can be expensive, the 90919-02240 ones are relatively cheap. I've even seen them new on ebay for less than $ 30.00 ea. I'll post a picture here, once I dummy it all up. Cheers Banjo As explained in the section above all of the four will fire for as long as the duration of the activation ofal from the ECU. However they will also fire to minimum dwell time regardless of how short the signal is triggered, this minimum duration is hard wired and can't be altered.

Looks awsum mate. Great to see it out there having a crack, not just a show piece. Love it.

A bit more progress today. Slowly coming together.