Here's why a single number won't work and what you need to do:
* Initial Timing: The initial timing is the base setting when the engine is idling. It's usually specified in degrees Before Top Dead Center (BTDC). This number varies slightly depending on the specific emissions standards and other factors for your particular engine. It's often around 10 degrees BTDC but can be slightly higher or lower.
* Total Timing: The total timing is the advance that the distributor adds as the RPM increases. This is not a single number either; it curves gradually. It's controlled by the distributor's centrifugal advance mechanism and vacuum advance system. These components will be adjusted by the manufacturer to meet the needs of your specific engine.
* Setting the Timing: You cannot accurately set the timing without the following:
* A repair manual: This will have the specific timing specifications and the procedure for properly setting the timing for your specific engine.
* A timing light: This tool is essential for accurately setting the timing.
* Access to a reliable tachometer: Your timing light may have this built in.
* Possibly a vacuum gauge: Depending on the specifics of your vehicle's repair manual, this may also be needed to properly adjust the advance mechanism.
In short: Don't try to guess the timing. Consult your Ford Econoline E-150 repair manual for the correct procedure and specifications. Improper timing can damage your engine.
