Reply to "Timing marks?"

George PAdmin.

Danny,

with the motor warmed up to normal operating temp, and idling in the driveway, all vacuum connections connected to the distributor, slowly twist the distributor in the advance direction. As you do so the idle speed shall increase. Keep twisting slowly until the idle speed just reaches the point where it no longer increases, this is the ideal ignition advance for idle. This setting will also result in the highest intake manifold vacuum, and can be set with a vacuum gauge just as accurately as a tachometer.

This can be a problem with high compression motors, making them hard for the starter motor to crank, but with your cobra jet motor it is not a concern.

Low speed power, throttle response, drivability will all improve. Your motor will also have less of a tendency to overheat when idling (more heat being converted to work, less heat load on the cooling system).

give it a try

George

2/11/073:07 PM

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