I doubt that would be at all related. I'm fairly confident I identified the source of the stumble as an oversight I made in transitioning correctly at speeds where coils needed to be dwelled right around the 90 degree multiples (i.e. more than one TDC event ahead).
Bear in mind that the opti has open collector outputs that are quite different from the outputs of un-amplified hall effect sensors in terms of noise immunity. I've no first-hand experience in the field but I believe most factory harnesses use either twisting or shielding around hall sensor pairs due to the nature of the signal. I noticed no such care taken with the opti lines when I spliced into my harness.
That would be very helpful (more timing info). Assuming the signal transition coincides with #1 and #6 TDC, a synthetic CMP signal would likely be so trivial to implement I'd do it just for fun. The only drawback would be the controller would need to detect sequence before the synthetic CMP signal could be properly timed, and then the PCM would finally be able to detect sequence - possibly 360 degrees later. This means start time could be higher than with a native CMP signal, and it could potentially trigger a CKP or CMP code in the LS PCM.
I've been casually following the progress of the LS_droid stuff. It's a very significant milestone, but to be honest PCM swaps for a "nostalgia" gen 2 LT-1 wasn't the first thing I thought would result from it. My first thought was it will just make LSx engine swaps that much more ubiquitous (if that's possible).
Whatever the case, thanks for bumping the thread. I just got the tracking # on my reciprocating assembly yesterday afternoon so I'm finally going to be able to start building in a week or so.
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