I was checking the timing on my '56 292. I'm running a recently rebuilt t-pot carb with a modification to run a single vacuum line to the vacuum advance. I have a distributor from a '62 Y-block and a single vacuum advance. When I adjust the timing with the vacuum line disconnected to the I think "3 deg" mark on the damper and then reconnect it after it's sets it runs poorly. It advances quit a bit with the line reconnected at idle. When I set it to the spec'd degrees with the line connected it runs much better, like it should. How much should the vacuum advance advance the timing at idle? It seems too much which is causing a poor running condition as specified in the shop manual.


~DJ~ AKA "Bleach"
1956 Ford Fairlane Town Sedan 30K original miles

The 62 version would be more desirable to me.. That way you can give it 12-14 degrees of initial advance for a nice idle and throttle response and the 22 degrees in the distributor gets you right where you want to be for total timing