[mwilliamshs]

Great thread! What if you use an Innovate LM2 to read actual AFR and modify the O2 signal to the ECU via the LM2's adjustable output so that instead of 14.7:1 in closed loop you were running say 16:1? (Or basically as lean as possible but as rich as necessary)

You'd have the gauge to monitor actual AFR so excessively lean running (and high EGTs) could be avoided and you'd still have the stock power enrichment (open loop) tables to preserve high load needs.

I've been thinking about this for years but never dug into it much. I now have a speed-density vehicle (no measure of airflow on the intake) and think a modified 02 signal would work to improve FE.