1- no, more than likely the afr range will be too low.
2- yes, increased pumping loses, plus the ecu is mapped (fuel & timing) for it
3- what ecu? If P07, the controller is in the ecu. The o2 sensor is 120-240 itself for the correct ngk.
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Shooting for 600 miles of range at 65-70 mph out of a vx.
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