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Yeah, I kinda figured that trial and error was the way to go, I really hate spending $30 on something that I'll probably only use once.

Thanks for the input gang!

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If you don't want to buy the kit just pick up a 39 cent protractor at the stationary store and glue it to an old rotor with the center centered over the main shaft of the distributor. Tape a piece of coat hanger to the housing to use as a pointer. Then just twist the rotor against the advance springs to measure the advance and adjust as necessary.

You want to measure on the protractor 1/2 the number of crank degrees you want, remember the distributor turns at 1/2 the speed of the crank. So if you are looking for 20 degrees of advance in the distributor the protractor should read 10 degrees.

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You can do it with a degree wheel also.


In my experience the plastic "gauges" that come in the mallory spring kit don't yeild as much advance as they say..... But the graph provided in the instructions does show curves for the different spring combinations which does seem good.

I don't know what springs I have in mine but I checked it last night and it starts advancing at 1200 and is all over by 1800. I only have about 14 degrees mechanical advance though.