Morning,

I've got an Innovate wideband that i've just installed into my car. I thought it was running a little rich in the midrange and the lambda sensor seems to back this up.

Anyway, just wondering whats ideal, some say 12.5 a "tuner" told me 13.1 I've also heard 11.9 to be safest.
I was told by another person anything from 0.8-0.9 lambda to be the the limits (11.76-13.23)

So whats best?
Its on a turbo car. And at the moment its hitting 11.6 as the leanest on WOT. And about 10.6 at very richest, only ever hits this for a split second.

It's probably the wrong place to ask on the ford forum as all the cossies i see are bluming black smoke out like there on a mission to "clean" there bores

Many thanks.