Drilled Carb, No Vacuum

[Wunderbug]

Hi, I drilled the port on my 34 PICT 3 carb for the vacuum feed, but when I put a vacuum gauge on the port it shows zero vacuum at idle and increasing the RPM. Is that the way it is suppose to be or are there any suggestions? Thanks

[volkenstein]

Wunderbug,
          Post a pic of your carby/engine, or send me one at ctefehinoz AT hotmail dot com. I would also ask - how is it drilled? 4mm with a 2 mm step going throgh the body or something else?

At idle there should be none/minimal. It only needs 5in/hg to activate. You can put a vac gauge on it and see if it is working with varied throttle.

HTH
Volkenstein