JDM wideband O2 Sensor

Hoggy · Post by **Hoggy** » Sun Jun 19, 2005 8:29 am

Hi,

Is the stock JDM wideband sensor accurate for tuning? I have been tuning from my datalogging to AF of 13.2-13.5.

When I did my dyno, the dyno sensor read AF of 13.9-14.5. If it's supposed to be fairly reflective, is it time to change my O2 (about 2.5yrs old)?

Thanks.

Post by **Hondata** » Sun Jun 19, 2005 1:08 pm

Where was the dyno lambda sensor in relation to the stock sensor? If the dyno sensor was downstream of the car or in the tailpipe, the readings will not be the same. The stock o2 sensor reads within 0.1 AF of my PLX wideband as long as the sensor are next to each other. The dyno reads 1.5 AF points leaner than both sensors because it is downstream of the cat.

Hoggy · Post by **Hoggy** » Sun Jun 19, 2005 5:36 pm

Yup, it was placed at the tailpipe. That explains the difference. The peak power achieved was the same after enriching the mixture using the dyno sensor to about AF 13.0. Now, my datalogging reading about 12.2-12.5.

Would you recommend using the dyno sensor setup as a basis for tuning AF? Somehow I feel it can make a bit more power leaner but feeling uneasy that it reads a lot leaner on the dyno sensor.

Thanks.