Wide Ratio O2

[garfield at pilgrimhouse.com]

On Mon, 23 Mar 1998 11:16:19 +0000, bamcknig at postoffice.syspac.com
wrote:

>It sounds (reads) like the wide range  O2 meter is doable and not to 
>expensive ($300 or so).
>Do you have any idea about the benefits over the original el cheapo 
>O2 analyzer?  If I got my old (less than 30,000 mile) single lead 
>sensor running at about 750 deg.F. after warm up and have the exhaust 
>system bonded to electrical ground, how much will I benefit by going 
>to a three lead system (I don't think much), or to the wide range O2?

Dude, if you have an el cheapo O2 analyzer that's giving you good
results, probably not much. But most of them "switch-type" sensors, even
the heated ones, have so steepNnasty a curve of O2 vrs voltage that they
aren't usually good for much of anything but telling if you are rich or
lean of stoich.

If you have one that's showing readable transitions between say each 0.5
AFR, or even 1.0 AFR changes, and you know those reading are for real,
you've got one of the 'few' el cheapos that works worth a diddle. Count
yourself unusually lucky; maybe buy a lotto ticket!

Gar