Re: 1953 Delco Vacuum Advance

Posted by DavidPackard On 2023/8/31 21:48:53

1of750 & 53 Cavalier

If either of you has a failed vacuum chamber would you document the total stroke and the number stamped on the arm (assuming there is one)? If the fitting and spring are removed there will be really no force impeding the motion of the diaphragm. When a replacement is available repeat the measurement.

I’m just trying to expand the sample size of arm configurations beyond my current limited experience.

Bye the way, with today’s octane I’m not sure the engine wouldn’t mind a little more ignition timing at light load. A high vacuum reading, and the throttle open enough to provide full vacuum to the chamber must be a transient condition.

dp