AVS2 Tuning Woes...

If you dont have any slack in the throttle cable at idle you will have to do what RRR said. Find another point to connect the cable to that will give it more throw. I have an avs2 on one of my cars ,I can snap a pic of my setup for reference.
The only issue I fought with the AVS2 was a bad bog when the secondarys opened. The flap adjustment didnt seem to do anything no matter how it was adjusted. I finally got it sorted out after many combinations of the piston springs and jet changes. Its a nice carb once you get it sorted out. It fires up quick when cold and has been very reliable.