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Old 12-30-2013, 06:59 PM   #3 (permalink)
Old Tele man
...beats walking...
 
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Join Date: Jul 2009
Location: Tucson, AZ
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Q: Why no more lean burn??

A: EPA regulations.

Notice how "Best Economy" (blue line, ie: Lean Burn) coincides with NOx peak in below graph...and, remember, it's NOx which creates LA's brown-smog.



• source: EndTuning - Air Fuel Ratios
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Last edited by Old Tele man; 12-31-2013 at 12:09 AM..
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