Quote:
Originally Posted by California98Civic
Again though, at 18:1 AFR, this chart suggests NOx is lower than at 14.7:1 and so is CO2. Why isn't 18:1 lean burn common place in contemporary cars? Or is it maybe common and not touted like in the old days of the 90s and early 00s?
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That graph is assuming you don’t have a cat,
Given the circumstances today it’s likely because of two things
1. We never did it so it’s impossible (hear that a lot)
2. Emissions controls (not represented by the graph) reduce Nox below the graph,
the unfortunate part is because we are laser focused are a single pollution percentage we rather burn more fuel and make more pollution in grams per mile.