Berlin Turbo modification help

[spineshank385]

I added a venturi and a mag 7 to my berlin turbo, replacing the needle wheel pump that it had originally (pump stopped working).

The problem now is, either i have bubbles that are too large, or not enough bubbles. What is the best way to regulate airflow into a venturi?

Also, is a mag 7 big enough to handle the triple pass design?

 

[RandyStacyE]

You can place a small valve on the air hose to regulate the amount of air that is sucked in.