Quote:
Originally Posted by aerobod
I believe that under WOT conditions the car should be running open loop and there should be no feedback from the O2 sensor (unless a non-OEM wideband sensor is being used).
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I think the precat O2 sensors are wideband, and that open-loop operation at WOT is a thing of the past for BMW's. I was under the impression that newer BMW's ran closed-loop all the time.
Quote:
Originally Posted by BMW Maniac
This is a MAF based system, correct, and not a MAP based?
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I think the VF420 kit is MAF-based, and the 480/570 are MAF-less tunes.
Edit: I'm not where I heard this, and I'm reading different information on VF's website.