Vacuum advace from where?, I swear I serched but did't quite get what i was looking for Options

[914chic]

Alright i recently converted my 74 fuel injected to carbs and was wondering what you guys did for the vacuum advance on the distributor , the only way I can see doing this is tapping into the intake or what . Calling on you joe sharp if you got ant ideas?, or anyone , thanks alot.

[r_towle]

Dont plug it, leave the port on the dizzy open or you will create a vacuum inside the distributor advance can that will not allow it to advance the plates, unless the can is already leaking.

Just leave it unplugged and open to the air.

The vacuum advance moves the advance plates only when at low idle and you dont have enough centrifical force to swing the advance plates into full advance. Without it, you still have full advance, just not as fast as with vacuum.

On webers there is a little bung (you need to drill as Slits said) down near the bottom on the outside of the carb. There are two bungs, one per venturi, but you would only need one. It is located at the bottom, next to the air mixture screw...you will see it.
If you buy a simple 1/8 inch NPT brass piece from the hardware store, that is the item that you drill, tap and put in there. The outer portion is 1/8 inch with a barbed collar to hold the hose.

I would say try it without first to see what it feels like.
The Decel, or retard port (if you have one) is to reduce emmissions by closing down the advance plates faster...it also gives better idle...
It brings the car back to idle faster, so you reduce emmissions and save a little gas.

Rich