air/fuel ratio at idle/wot

[UnderdogGN]

Just have a quick question,
where should the air fuel ratio be at idle on a h/c/i car?
Im pretty sure a safe WOT a/f ratio is around 12.8/1 right?
thanks

 

[jrichker]

The computer will shoot for 14.7:1 which is the perfect ratio for maximum economy and minimum pollution.

 

[NIKwoaC]

The computer will shoot for 14.7:1 which is the perfect ratio for maximum economy and minimum pollution.

AKA: stoichiometric. 14.7:1 is the ratio where all fuel and air will be consumed during combustion (ideally). Though I'm pretty sure you want to run a tad rich at WOT, for engine safety and chemical reasons like all the fuel will not vaporize perfectly and flame front moves faster in a rich mixture, etc. 12.8 sounds about right, but could also be too rich. Just check the plugs for fouling after some driving to see if its too rich.