Wideband O2

[Cashizslick]

so what does a wideband O2 sensor do and how is it usefull for tuning your motor ?

. . Sorry for the dumb question, and yes i searched - cash

 

[Cashizslick]

BUMP

 

[posol]

most hondas, with the exception of the 5-wire VX and HX, run a Narrow band o2 sensor, either heated (4-wire) or not heated (1 and 2 wire).

Most wideband meters have a 0-5 volt output proportional to air fuel ratio. Noarrow band units, like the stock o2, run close to 1 full volt for almost all ari fuel ratios that a car could possible run "well" under. That output is fed back into the gauge or tuning unit and can be converted into a precise air fuel ratio. The stock O2 sensor is very inaccurate for anything other than 14.7:1 airfuel ratio.

as you can see, lean or rich, its still throwing back just under 1 volt. it's near meaningless.

 

[posol]

see also: http://www.widebando2.com/FAQ_1.htm

 

[Iquark]

Hey B, so could we use a stock vx or hx O2 sensor as a Wideband O2 sensor?

Ian

 

[posol]

to a certain extent, yes.

however, they don't work well. i'm not sure exactly why though.

 

[Cashizslick]

so, thats why we go buy a nice one like AEM's wideband o2?

 

[posol]

yup, cuz it has a meaningful voltage to return, 0-5 volts which directly corresponds with an a/f ratio (depends on the actual wideband. some may start at one and end at 4, and be less accurate for "steps" between)

 

[Cashizslick]

who else makes good quality wideband o2's?

 

[D See 2]

is this decent?:
http://cgi.ebay.com/ebaymotors/ws/eBayISAP...item=2466652634
it looks like that uses the honda 5-wire wideband sensor.

it does... here's the manufacturers site.... http://www.techedge.com.au/vehicle/wbo2/1v5/built.htm in this case, why couldnt you just use this sensor and get a voltage reading and use the formula AFR = 9 + (2 * Vlin) to get your a/f ratio.

some more helpful links... http://www.techedge.com.au/vehicle/wbo2/wblambda.htm

 

[xj0hnx]

Originally posted by Cashizslick@Mar 16 2004, 08:02 PM
who else makes good quality wideband o2's?

http://www.plxdevices.com/M-Series_Videos.htm