return line to gas tank

[Gary Derian]

CO is low everywhere on the lean side of stoic.  NOx is highest at stoic
where combustion temps are highest.  HC is lower as you go leaner until lean
misfire.  Stoic is best for emissions only with 3 way cats.  Without cats,
as lean as possible gives best emissions.

Gary Derian <gderian at cybergate.net>



>Tom wrote:

>You are all right and wrong. Normally aspirated engines make more power
when they
>are cold because they can injest (sp?) more air and fuel. But Blown motors
don't
>have that problem --- run 'em at 250 or higher -  if you can stand the
detonation.
>CO and NOx are both low(est?) at 14.6 afr. Each goes up quickly on one side
of
>14.6, so 14.6 is the balance point for emissions w/o cats.
>