a narrowband o2 sensor is only accurate at or near stoich. stoich only matters when cruising or idling. your stock narrowband o2 sensors are ignored by the ECU at full throttle because they are not accurate at the a/f ratio range that you would desire under full throttle.

you cannot put a wideband sensor on a narrowband gauge, because narrowband gauges cannot read the signal from a wideband which operates entirely differently.

an air/fuel guage that reads off your stock narrowband gauge is a completely POS and it will not tell you anything useful for tuning.

you can use the narrowband gauge only if you get a wideband with a programmable output and calibrate the output to send a signal to the narrowband that it can read and you will have to self calibrate it until its reading accurately.

 

wideband it is then! thanks!

 

hi guys

from what i know...defi afr gauge is just a 0-1v input gauge. You will need a wideband controller (like the LC-1) to send a 0-1 voltage in, that's the only way to get any useful data. The only thing that suffers is resolution, as long as you use a wideband controller. The LC-1 has fully customizable analog out, which can be configured to whatever the defi's specs are (such as 0v=9afr, 1v=20 afr, or smht of the sort). So, if you are going to need a $200 LC-1 and pay $120-150 for thedefi afr gauge, might as well just buy the LC-1/XD-1 combo for $375 from sharif and be done with it.

 

^^I couldnt agree more^^.