Holley/Demon Carb stumble
Fuel in the air well and main well is the same as in the bowl.
Increase airflow through the booster creates a low pressure area.
The upper e-hole allows some change but also restricts flow of air and fuel.
The combination of MAB, e-hole, fuel level and booster signal may move very little to a significant amount of fuel -air mix to the booster at this stage.
The graph YR posted shows the effects of changing the air bleed and e-hole combinations.
An imprtant take away is that MAB can effect start up.
However, its main job is to controlling AFR at the highest air flows.
Therefore my approach is to adjust the MAB for flat AFR at the top end, while keeping an eye on what's going on at the lower rpms. (talking WOT conditions only).
Lets ignore the effect of the idle circuit on the main.
Fuel in the air well and main well is the same as in the bowl.
Increase airflow through the booster creates a low pressure area.
The upper e-hole allows some change but also restricts flow of air and fuel.
The combination of MAB, e-hole, fuel level and booster signal may move very little to a significant amount of fuel -air mix to the booster at this stage.
The graph YR posted shows the effects of changing the air bleed and e-hole combinations.
An imprtant take away is that MAB can effect start up.
However, its main job is to controlling AFR at the highest air flows.
Therefore my approach is to adjust the MAB for flat AFR at the top end, while keeping an eye on what's going on at the lower rpms. (talking WOT conditions only).