As the title suggests, I'm trying to get concrete data on how inaccurate the stock wideband O2 sensor is in the Subaru Forester XT (MY06 to MY08). I am attempting to create a custom map for the car and was cautioned by a Subaru expert that the stock O2 sensor measures too rich under Wide Open Throttle, making it seem like the car is running richer that is actually the case, which in turn could be disastrous if I tried to lean out the mixture to what I think is still a safe number.
As with my previous question, I'm not after opinion (Lord knows I've had enough opinions from the NASIOC and RomRaider people). If someone can tell me e.g. "The stock Subaru O2 sensor diverges from (for example) the Innovate LC1 by 0.8 units under WOT", that would be greatly appreciated. This is just an example. I have no idea what the actual difference between the LC1 and the stock unit is.
And again, I've gotten enough opinions on the matter. What I need is hard data from someone who has measured the difference (If any).