just curious because I see this mentioned a lot.

Thanks,
Victor

 

Let you know how the fuel mix is reading... "too lean or too rich"... when you know how the mix is coming out of the engine you can tune it to prevent any damege... knowing how is your mix you can adjust fuel pressure, ing. timing, ect... for optimus performance.
This is use for FI engines but you can use it for N/A if you like!

hope tihs help!

 

Well I know about lean and rich conditions and about tuning the car to perform correctly, what I am asking is Why the WIDEBAND setup? Why not just a normal Autometer gauge?

What makes WIDEBAND so special?

 

Well is more quick to read the mix... if you use a Temp Exhaust gauge you see the reading a litlle late but not to late for not tune it as well!

I uses both w my Procharger SS and the Temp. Exhaust was good to tune it in top gears!!!

 

basically, the wideband has a much braider specturem it can read and does so much faster than a conventional narrow band 02. narrow band 02's are 0-1volt sensors, 0 being dead lean 1 volt being full on rich. Widebands are 0-5 volt sensors, so a much broader scale. The broader your scale, the more accurate of a reading you get. Thats a very rudimentary explanation mind you, but covers the basics.

 

Ok, narrow band o2 sensore are designes for nothing more than reading mixtures close to Stoich, they were originally designed to give feedback to ECM's to control the mixture at idle, and cruise IE for emissions and fuel economy. They become more inaccurate the further you go from 14.7:1. Wideband O2 sensors were designed to give reliable feedback through out the engine's entire operating range. They can read miixtures from somewhere below 10:1 to above 20:1 This is all the range you will ever need with a gasoline engine. Their beauty is in being able to read full throttle mixtures like 12:1 and being able to do so accurately. When tuning a forced induction car, depending on the car, boost levels and other variables, you will want a mixture say between 12.2 and 12.6 :1 this is an example. A wideband can tell wheather you are at 12.5 or 13.2 this can mean the difference between a healthy turbo/blower motor and an expensive pile of broken parts. A narrow band will say you are rich for both circumstances. High end aftermarket ECM's can actually use this input and tune real time. Generate a chart of what you want for a fuel curve and let it create it. When tuning on a Dyno you can use a WB to tweak your fuel tables for safety.

 

with the appropriate ecu, it will give you actual air fuel ratio. Not a guesstimate based on exhaust gasses