Quote:
Originally Posted by Live4Driving
What is the leanest AFR that is typically considered safe? I have done some searching on the web and I've seen people talk about the ideal AFR mixture settings with a tune and people warning of leaning out a car but at what point is the AFR considered too lean that it hurts the engine? Anything above 13 or 14.7 or is there another general point that I am missing?
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14.7 is idle. I don't recall exactly from my NA tune but I don't think I go leaner than 11.7ish.