Six pack secondary paper clip test?

pishta said
@RustyRatRod Rob, isnt the vaccum secondaries velocity based in a Holley? ie, velocity across the small vacuum pot sense orifice in the venturi? It generated a vacuum in the pot and opens the secondaries, or outboard carbs in a 6-pac. stiffer spring keeps em closed for a later in the RPM opening to reduce bogging. Still cant open them revving it as there is not enough velocity.
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Yeah, that's how I always though about it. In other words, when manifold vacuum DROPS OUT, the secondaries open. The venturi vacuum takes over. That's how it works.