I said they are considered vacuum secondary carbs because the secondaries function off of engine demand and not strictly off of the throttle plate butterflies. Twist however you want but look them up on Summit or Jegs and see if they are listed as mechanical or vacuum secondary carbs. You could also try pointing out where the secondary accelerator pump squirters are on those carbs.
So you use sales ads for your technical information? That helps explain your opinion on this.
And I have no idea what you are trying to say about the pump squirters. Did you read that in an advertisement, too?
Bottom line; the secondary air door is not essential to the operation of the secondaries. It can be an asset and certainly helps in some applications but is not an absolute necessity.
