03-02-2011, 05:55 PM
The vacuum advance should be connected to the manifold source. You should also double check the advance solenoid and that the advance plate is functioning properly in the distributor. Set your base time and idle mixture with the line disconnected and capped. Then install when your done.
This will allow you idle the carb a little lower and leaner. The vacuum advance will help smooth the idle, then it will drop out as vacuum decreases and the centrifugal advance will take over when accelerating. After reaching cruising speed, the vacuum advance will add to the mechanical increasing fuel economy and drivability.
This will allow you idle the carb a little lower and leaner. The vacuum advance will help smooth the idle, then it will drop out as vacuum decreases and the centrifugal advance will take over when accelerating. After reaching cruising speed, the vacuum advance will add to the mechanical increasing fuel economy and drivability.
'72 TBA...