[snbush67]

I think that your larger secondary holes are letting more air in to mix in the idle jet, while the unchanged main hole lets in the same amount of fuel.

Read down further on Paul’s description of detailed operation. Both during idle and progression air and fuel mix in the idle jet.

{The fuel passes up a dedicated fuel gallery located between the emulsion tube well and the fuel gallery running down the outside of the throttle body. It then passes through the idle jet where atmospheric air from the idle air bleed jet mixes with and emulsifies it before continuing down the external fuel gallery.}

{The idle and progression circuit achieves the same result using a different method; air from the idle air bleed jet is mixed with the raw fuel inside the body of the idle jet.}