[patrickt]

Cobragene, I'm still suspicious that there is something that is just not working right on your vac secondaries. I'd like to see if you can "force" them open with a tremendous amount of venturi vacuum. So, get a wash cloth out of the bathroom and take your car out to a reasonably deserted straight away. Then remove your air cleaner and drape the wash cloth across the driver's side half of the primary side, so that the carb is only breathing through the passenger side of the primary. Your car is now essentially a one-barrel carburetor. Set your zip tie so you can measure secondary opening. Then put the air cleaner back on so it holds the wash cloth in place and run it down the highway at full throttle, stop, remove the wash cloth and examine the zip tie. Unless something is broken that is virtually guaranteed to open the secondaries fully.