
Originally Posted by
StraightSix
Let's the break this down into something more easily understood. An AFR is the Air/Fuel Ratio, right? And, lots of people, even ones without an engineering degree or any exposure to thermodynamics, know what the stoichiometric ratio should be. But, what does that mean?
The stoiciometric ratio is the ratio where the amount of air to the amount of fuel is correct. So, simply, a good AFR for an 800hp turbo whatever is going to be the same for a roughly 100hp Honda, or a 5hp lawn mower.
Adjusting timing to get won't really change anything. All you're doing there is changing when the volume of air is going to be entering and leaving the cylinder. It isn't going to solve the problem of getting too much fuel.
Rejet the carb first, then fine tune with timing. And, all this is assuming that the carb is the right size for the engine in the first place.