[HWYSTR455]

Also kills me: People say they send their' distributors off to be 'tailored to my config', or 'back to factory original'. Both will most likely never get you where you need to be, every car is different, and you have to do it yourself, using trail & error method.

Another: 'I sent it to a guy who has a machine' . Uhg. So what, it will be a well-documented poor setup.

Anyone can do it themselves using only a timing light. 4 areas, initial, total, and rate of advance. Then you add vacuum.

Use graph paper, create a graph with timing on one side in 5 degree increments and RPM along the bottom in 500 RPM increments.

With the light, measure timing from idle to about 3500 RPM, in 500 increments and put dots on the chart. Drive it, and note performance and where any issues may appear in the RPM range. Then adjust.

Pontiac iron head engines like about 32 degrees max, all in around 2500-3200, start there.

You can determine max mechanical advance by removing the springs, and blipping the throttle to see what the reading is.



.