Power Valve Selection: The Definitive Answer
Maybe this version is a little clearer.
or actually more like this.
In many cases there is no fuel sitting in the idle circuit when the throttles are open enough that the booster is pulling hard. In fact, with very low pressure created at the booster, the IAB at atmospheric, and the transfer port no longer at really low pressure, its possible for air to flow back through the idle restriction into the main well.
This ^^^ is the reason getting the idle circuit figured out first is the best. And if we can't, then its good to do at one more itteration of idle and main circuit tuning. Idle circuit restrictions and bleeds can effect main circuit.
Maybe this version is a little clearer.
or actually more like this.
In many cases there is no fuel sitting in the idle circuit when the throttles are open enough that the booster is pulling hard. In fact, with very low pressure created at the booster, the IAB at atmospheric, and the transfer port no longer at really low pressure, its possible for air to flow back through the idle restriction into the main well.
This ^^^ is the reason getting the idle circuit figured out first is the best. And if we can't, then its good to do at one more itteration of idle and main circuit tuning. Idle circuit restrictions and bleeds can effect main circuit.