Question: Does Timing Affect Air Fuel Ratio?

Does advancing timing make more power?

Changing the timing value up or down changes the engine speed up or down for the optimum ignition timing.

The engine speed operating range affects where the timing is the best.

Increasing the timing advance raises the high-end power, reducing the low-end..

What happens if ignition timing is too advanced?

If ignition timing is too far advanced, it will cause the fuel-and-air mixture to ignite too early in the combustion cycle. This can cause the amount of heat generated by the combustion process to increase and lead to overheating of the engine.

Is it better to run an engine lean or rich?

Running lean can give you more power but to lean will blow your engine. Running too rich can also hurt your motor. Think of it when you are mixing gas for your weed wacker. It is always safe to add a little more oil than not enough to the mixture.

Is 16 AFR rich or lean?

Any mixture greater than 14.7:1 is considered a lean mixture; any less than 14.7:1 is a rich mixture – given perfect (ideal) “test” fuel (gasoline consisting of solely n-heptane and iso-octane).

What should air fuel ratio be at WOT?

We mentioned the stoichiometric air-fuel ratio (14.7:1) that is the ideal ratio for lowest emissions, but this isn’t the best ratio for power. It used to be that 12.5:1 was considered the best power ratio, but with improved combustion chambers and hotter ignition systems, the ideal now is around 12.8:1 to 13.2:1.

Does timing affect gas mileage?

Advancing timing as much as possible without pinging will give the best mileage. You might just advance it 1-2 degrees at a time because it is possible that if pinging occurs, the knock sensor will detect it before you hear it and the ECU would then retard the timing and richen the mix.