|
Let me add that todays' modern engines try to maintain 14.7:1 mass air/fuel ratio, not for economy or power, but rather for EMISSIONS COMPLIANCE.
That's *why* individuals have to 'circumvent/trick' the engines normal "closed-loop" operational mode to make them "more efficient," by getting the ECM to operate closer to "lean" A/F ratio (16-18:1) than the 'chemical correct' stoichiometric (14.7:1) ratio needed for EPA requirements and catalytic converter "longivity."
|