bullshit posts delted.
don't do that shit again-- ALL OF YOU.
now for the reasoning:
--wideband vs regular ol' heated o2
Most wideband meters have a 0-5 volt output proportional to air fuel ratio. That output is fed back into the O2 sensor wiring where <insert capture device > can turn it back into a precise air fuel ratio, just how your TPS uses 0-5volts for closed and wide open throttle. The stock O2 sensor is very inaccurate for anything other than 14.7:1 airfuel ratio.
take a look:
anything other than 14.7 (or just about stoich) the stock 02 sensor is useless. it will throw you a false result - a near constant voltage - , and in doing so, fuck up your entire tuning.
The ECU aims to keep the air/fuel ratio close to the stoichiometric air/fuel ratio in order for the catalytic converter to work at maximum efficiency. This air/fuel ratio also gives good fuel economy. Under increased engine load the optimum air/fuel ratio is richer than the stoichiometric air/fuel ratio in order to give maximum engine output and prevent engine damage.
An oxygen sensor produces an electric voltage from the different levels of oxygen present in the air and the exhaust gas. If the mixture is rich then the exhaust gas will contain very little oxygen. The oxygen sensor will therefore product a voltage output, which the ECU senses and determines that the fuel mixture is rich. Conversely if the fuel mixture is lean then the exhaust gas will contain higher levels of oxygen, which produces a lower voltage output. The normal range of the oxygen sensor output signal is about 0.2V to 1.2V It should be noted that most stock oxygen sensors are designed to be particularly sensitive around the stoichiometric air/fuel ratio
most info graciously stolen fmo hondata.com