Timing a 1951 Ford Flathead

[51shoeboxer]

Originally Posted by 38 coupe

The Load-a-matic uses primarily venturi vacuum. There is a little port drilled into the venturi, the more air flow the more vacuum. This is also tied into a passage near the throttle plates. Hook up your timing light and watch the ignition advance while you slowly rev the engine, and while you snap the throttle open. The advance is a good match to ignition timing needs based on engine load and speed.
You must have a good vacuum advance can for this to work.

Thanks, I will check that.