So, Dominick...A verdict???

[Aurora40]

Originally Posted by Paul Workman

A tuner would know, but I seem to recall reading that the exhaust pulses from the individual cylinders across the respective bank O2 can be (and are in some cases) monitored with respect to the exhaust valve timing. Thus, the mix and even the timing can be or is tweaked on individual cylinders - one of the advances allowed by the faster computers and OBD-II - one of the big advantages of the LSx over previous (OBD-I) ECM limitations. This could make position of the O2 on aftermarket exhausts a bit critical, if correct indexing of the cylinder is to be maintained. (I don't recall the source - been a while back.)

They certainly seem to be able to infer things like misfiring on an individual cylinder. I didn't know they also made fueling decisions on a per-cylinder basis, though.

Using a more modern controller would certainly be interesting, and perhaps could eliminate some of the difficult to find electronics. Though I wonder if it would be hard to get these newer ECMs to work with the 9-slot crank ring?