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I'm impressed. Wonderful writeup.
Unfortunately I wouldn't be comfortable using this in a 'street tune' situation for tuning fuel maps- ignition maps maybe, since there have been members on this board do their own work with the ignition maps and with great success- and have posted their tables which would give a good starting point.
The ECU does not provide data logging capabilities that would make street tuning fuel maps a viable method IMO. You not only need a wide band O2, but also you need to be logging RPM, manifold pressure, and throttle position along with that wide band O2 so that you can see the ever-changing A/F ratios as you change the load and speed of the engine.
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