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Old 09-09-2013, 01:48 PM   #4 (permalink)
gone-ot
...beats walking...
 
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Blame it on EPA / CARB emission regulations, because of these 3 facts:

• best POWER occurs at about 12:1 AF-ratio, for E0 gasoline.

• best ECONOMY occurs at 16-18:1 AF-ratio, for E0 gasoline.

• todays ECM's maintain 'stoichiometric' 14.7:1 AF-ratio in "closed-loop" operation for catalytic convertor operation.

Last edited by gone-ot; 09-09-2013 at 07:03 PM..