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Well, I've been thinking, on and off, of using a WBO2 controller to control a WBO2 sensor, and passing the output through a microcontroller to generate a simulated narrowband O2 signal for the stock engine computer. The circuit would modify the WBO2 signal as required, taking throttle position and MAP into consideration, to fool the engine computer into running lean.
After thinking and thinking about it, I've come to the conclusion that I well and truly hate this idea. Why? Because decent off-the-shelf WBO2 controllers cost at least $150 apiece, and I'd need to install 4 of them into the Magnum (2 pre-cat and 2 post-cat). That's on top of the 4 each WBO2 sensors themselves, which I think are about $50 a pop. That's at least $800, all told.
Alternately, to test the WBO2-controller-as-EFIE idea, I could go install my other ancient PLX WBO2 controller into the truck (for the post-cat O2 sensor), but... why? I don't drive it that much any more.
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