Datalog showing AF richer

[Hoggy]

I had tuned on different dynos with their o2 sensors and had used other o2 sensors for comparison. The readings on these o2 sensors were consistently the about the same but about 1.5 points off from kpro datalog. The datalog recorded 11.5-11.8 AF but the other o2 sensors displayed 12.8-13.0 AF

I had raised this before but was told the car o2 wideband sensor is fairly accurate. I used to tune with the car o2 sensor but not anymore after seeing the dyno sensor reading 14+ AF.

Is the JDM DC5R o2 sensor compatible with kpro calibration?

[Razathorn]

You should plug their o2 sensor in where the oem wideband goes and compare. Readings in the tail tend to be a bit leaner, especially with a cat as the cat will take some o2 to make other compounds and release o2 again in the second stage of it's conversion process but the o2 before and after the cat is not going to be the same... generally you see it a bit leaner by about 1 a/f point when you test with a wideband after the cat.