First, you know this is just a mental exercise, right?
Roffe Corollary: "If it says you can, you bloody well can!" Gauges are free, my wide-band sensor ports to a gauge, thus it is free. Disagree? All of my cars run wideband gauges with outputs ported to data logging, you'll just be risking $25 to find out its legality.
Furthermore, ECUs are free, including their wiring.
Additionally, data acquisition is allowed (nothing more than gauges that write info to to a card; there's no limitation on "gauges are free" that indicate I have to look at the data in real-time.)
Finally, it just so happens that my ECU is also my data logger, thus (legal) wires are feeding "gauge" data to my (legal and open) ECU through (legal and open) wiring.
ERGO, since my (legal) data logger in inside my (legal) ECU, and everything inside that ECU is free, take your best shot at proving they don't interface - or even more importantly, prove to me how that would be illegal in the first place.
Damn, I love these rules games...
See discussion above. What "prohibited function" to you suggest such an arrangement is doing? Feeding the (free) ECU air/fuel ratio info? A/F sensor came with the car stock. Replacing the narrow-band with a wide-band for better info? Nope, narrow-band is still there and wired up, but it's being ignored just like the MAF in the Miata that's being ignored because I'm using a (legal) TPS/MAP system.“No permitted component/modification shall additionally perform a prohibited function.”
Then, after all is said and done, if you still want to insist it's illegal and a prohibited function, my response is "fine, prove it's being done."
GA
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