Does any one know how many mV's are made for a given raito of A/F or P.P.M.'s of O2?

 

A high reading of 1100mv and a low reading of 100mv. Perfect fuel mixture while cruising is 400mv. Most cars run 700-800mv. WOT runs should be around 950mv

 

Just keep in mind.... an OEM narrow-band sensor is intended to be accurate ONLY at 14.7:1 = 450mV. At extremely rich A/F ratios like you will see at WOT, they are not that accurate. The shift in mV readings due to operating temperature will mask the shift in mV output as a result of a major A/F ratio change.

 

And because of the curve to achieve 14.7:1 is so steep, only a computer can compensate quick enough to keep a good air/fuel mixture.

It's always better to error on the rich side. Running lean causes much more problems then running rich.

It doesn't take much to install a 3 wire heated sensor in any vehicle that uses a one wire sensor. I installed one in my 91 454SS truck. I picked one up from the junkyard from a Ford Taurus. Once wire goes to the original single wire. Another is a ground and the third goes to a switched power source. Using a heated sensor especially in headers will put the computer into a closed loop quicker.

 

Also keep in mind that 1-wire O2 sensors will be highly susceptable to ground offsets, so you may want to run a ground wire from a location as close as possible to the sensor back to whatever piece of electronics you're using to monitor it.

I'd recommend just sticking a nice heated 3- or 4-wire sensor in there - it'll be about the same amount of hassle and provide better results.