View Single Post
Old 09-09-2013, 02:48 PM   #4 (permalink)
gone-ot
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,190
Thanks: 179
Thanked 1,525 Times in 1,126 Posts
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 08:03 PM..